/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/popl20/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:58:29,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:58:29,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:58:29,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:58:29,156 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 22:58:29,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:58:29,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:58:29,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:58:29,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:58:29,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:58:29,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:58:29,188 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:58:29,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:58:29,188 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:58:29,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:58:29,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:58:29,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:58:29,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:58:29,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:58:29,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:58:29,190 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:58:29,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:58:29,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:58:29,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:58:29,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:58:29,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:58:29,190 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:58:29,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:58:29,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:58:29,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:58:29,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:58:29,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:58:29,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:58:29,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:58:29,191 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:58:29,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:58:29,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:58:29,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:58:29,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:58:29,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:58:29,508 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:58:29,509 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:58:29,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2021-03-10 22:58:29,510 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-03-10 22:58:29,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:58:29,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:58:29,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:58:29,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:58:29,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:58:29,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (1/1) ... [2021-03-10 22:58:29,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (1/1) ... [2021-03-10 22:58:29,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:58:29,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:58:29,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:58:29,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:58:29,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (1/1) ... [2021-03-10 22:58:29,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (1/1) ... [2021-03-10 22:58:29,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (1/1) ... [2021-03-10 22:58:29,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (1/1) ... [2021-03-10 22:58:29,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (1/1) ... [2021-03-10 22:58:29,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (1/1) ... [2021-03-10 22:58:29,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (1/1) ... [2021-03-10 22:58:29,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:58:29,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:58:29,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:58:29,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:58:29,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (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 22:58:29,647 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:58:29,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:58:29,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:58:29,647 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:58:29,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:58:29,648 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:58:29,648 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:58:29,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:58:29,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:58:29,648 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 22:58:29,776 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:58:29,776 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:58:29,778 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:58:29 BoogieIcfgContainer [2021-03-10 22:58:29,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:58:29,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:58:29,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:58:29,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:58:29,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:58:29" (1/2) ... [2021-03-10 22:58:29,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfa3720 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:58:29, skipping insertion in model container [2021-03-10 22:58:29,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:58:29" (2/2) ... [2021-03-10 22:58:29,783 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-03-10 22:58:29,787 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:58:29,787 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:58:29,790 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:58:29,791 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:58:29,811 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 22:58:29,823 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 22:58:29,838 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:58:29,838 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:58:29,838 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:58:29,838 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:58:29,839 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:58:29,839 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:58:29,839 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:58:29,839 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:58:29,845 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-03-10 22:58:29,853 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:58:29,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:29,859 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:29,860 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-03-10 22:58:29,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:29,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165699] [2021-03-10 22:58:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:30,040 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 22:58:30,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165699] [2021-03-10 22:58:30,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:58:30,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:58:30,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340314422] [2021-03-10 22:58:30,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:58:30,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:30,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:58:30,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:58:30,062 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:30,118 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-03-10 22:58:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:58:30,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:58:30,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:30,126 INFO L225 Difference]: With dead ends: 43 [2021-03-10 22:58:30,126 INFO L226 Difference]: Without dead ends: 43 [2021-03-10 22:58:30,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:58:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-03-10 22:58:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-03-10 22:58:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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 22:58:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-03-10 22:58:30,164 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-03-10 22:58:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:30,164 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-03-10 22:58:30,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-03-10 22:58:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:58:30,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:30,167 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:30,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:58:30,167 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:30,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:30,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1417186195, now seen corresponding path program 1 times [2021-03-10 22:58:30,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:30,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131428357] [2021-03-10 22:58:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:58:30,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131428357] [2021-03-10 22:58:30,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:58:30,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:58:30,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537277825] [2021-03-10 22:58:30,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:58:30,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:30,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:58:30,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:58:30,277 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:30,316 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-03-10 22:58:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:58:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:58:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:30,319 INFO L225 Difference]: With dead ends: 50 [2021-03-10 22:58:30,320 INFO L226 Difference]: Without dead ends: 50 [2021-03-10 22:58:30,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:58:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-03-10 22:58:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-03-10 22:58:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-03-10 22:58:30,335 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-03-10 22:58:30,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:30,335 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-03-10 22:58:30,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-03-10 22:58:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:58:30,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:30,336 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:30,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:58:30,337 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-03-10 22:58:30,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:30,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475652134] [2021-03-10 22:58:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:30,478 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 22:58:30,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475652134] [2021-03-10 22:58:30,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060486774] [2021-03-10 22:58:30,480 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 22:58:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:30,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:58:30,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:30,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:30,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 22:58:30,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330043057] [2021-03-10 22:58:30,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:58:30,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:30,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:58:30,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:58:30,702 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) 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 22:58:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:30,718 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-03-10 22:58:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:58:30,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) 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 19 [2021-03-10 22:58:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:30,720 INFO L225 Difference]: With dead ends: 99 [2021-03-10 22:58:30,720 INFO L226 Difference]: Without dead ends: 78 [2021-03-10 22:58:30,720 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:58:30,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-03-10 22:58:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-03-10 22:58:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-03-10 22:58:30,725 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-03-10 22:58:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:30,725 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-03-10 22:58:30,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) 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 22:58:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-03-10 22:58:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:58:30,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:30,726 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:30,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 22:58:30,938 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash -654987203, now seen corresponding path program 2 times [2021-03-10 22:58:30,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:30,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345182447] [2021-03-10 22:58:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:30,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345182447] [2021-03-10 22:58:30,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965712443] [2021-03-10 22:58:30,981 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:31,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:58:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:31,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:58:31,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:31,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:31,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 22:58:31,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019420755] [2021-03-10 22:58:31,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:58:31,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:31,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:58:31,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:58:31,101 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:31,135 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-03-10 22:58:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:58:31,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:58:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:31,139 INFO L225 Difference]: With dead ends: 80 [2021-03-10 22:58:31,139 INFO L226 Difference]: Without dead ends: 77 [2021-03-10 22:58:31,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:58:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-03-10 22:58:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-03-10 22:58:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 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 22:58:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-03-10 22:58:31,152 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-03-10 22:58:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:31,152 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-03-10 22:58:31,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-03-10 22:58:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:58:31,153 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:31,153 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:31,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:31,368 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 3 times [2021-03-10 22:58:31,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:31,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498847060] [2021-03-10 22:58:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:31,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498847060] [2021-03-10 22:58:31,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039018281] [2021-03-10 22:58:31,446 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 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 22:58:31,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:58:31,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:31,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:58:31,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:31,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:31,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:58:31,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259629676] [2021-03-10 22:58:31,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:58:31,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:31,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:58:31,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:58:31,619 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:31,875 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-03-10 22:58:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:58:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:58:31,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:31,876 INFO L225 Difference]: With dead ends: 198 [2021-03-10 22:58:31,876 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 22:58:31,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 22:58:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-03-10 22:58:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-03-10 22:58:31,889 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-03-10 22:58:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:31,889 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-03-10 22:58:31,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-03-10 22:58:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:58:31,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:31,890 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:32,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:32,091 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:32,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 4 times [2021-03-10 22:58:32,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:32,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871216803] [2021-03-10 22:58:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:32,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871216803] [2021-03-10 22:58:32,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768777020] [2021-03-10 22:58:32,156 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:32,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:58:32,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:58:32,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:32,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:32,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-03-10 22:58:32,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045307395] [2021-03-10 22:58:32,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:58:32,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:58:32,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:58:32,317 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 22:58:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:32,639 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-03-10 22:58:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:58:32,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 22:58:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:32,640 INFO L225 Difference]: With dead ends: 170 [2021-03-10 22:58:32,640 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 22:58:32,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:58:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 22:58:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-03-10 22:58:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:32,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-03-10 22:58:32,654 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-03-10 22:58:32,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:32,654 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-03-10 22:58:32,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 22:58:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-03-10 22:58:32,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:58:32,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:32,655 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:32,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:32,872 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:32,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:32,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 5 times [2021-03-10 22:58:32,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:32,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311571149] [2021-03-10 22:58:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:32,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311571149] [2021-03-10 22:58:32,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407005315] [2021-03-10 22:58:32,960 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 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 22:58:32,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:58:32,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:32,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:58:32,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:33,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:33,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 22:58:33,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56437415] [2021-03-10 22:58:33,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:58:33,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:33,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:58:33,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:58:33,052 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:33,076 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-03-10 22:58:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:58:33,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 22:58:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:33,077 INFO L225 Difference]: With dead ends: 190 [2021-03-10 22:58:33,078 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 22:58:33,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:58:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 22:58:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-03-10 22:58:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-03-10 22:58:33,083 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-03-10 22:58:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:33,083 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-03-10 22:58:33,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:33,084 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-03-10 22:58:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:58:33,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:33,084 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:33,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:33,303 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:33,304 INFO L82 PathProgramCache]: Analyzing trace with hash -145594503, now seen corresponding path program 6 times [2021-03-10 22:58:33,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:33,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876575495] [2021-03-10 22:58:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:33,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876575495] [2021-03-10 22:58:33,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311367685] [2021-03-10 22:58:33,411 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 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 22:58:33,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:58:33,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:33,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:58:33,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:33,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:33,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 22:58:33,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54877470] [2021-03-10 22:58:33,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:58:33,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:33,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:58:33,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:58:33,618 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 22:58:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:34,052 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-03-10 22:58:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:58:34,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 23 [2021-03-10 22:58:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:34,056 INFO L225 Difference]: With dead ends: 320 [2021-03-10 22:58:34,057 INFO L226 Difference]: Without dead ends: 302 [2021-03-10 22:58:34,057 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:58:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-03-10 22:58:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-03-10 22:58:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-03-10 22:58:34,077 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-03-10 22:58:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:34,077 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-03-10 22:58:34,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 22:58:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-03-10 22:58:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:58:34,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:34,078 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:34,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:34,279 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:34,280 INFO L82 PathProgramCache]: Analyzing trace with hash -214603481, now seen corresponding path program 7 times [2021-03-10 22:58:34,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:34,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257359712] [2021-03-10 22:58:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:34,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257359712] [2021-03-10 22:58:34,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770941538] [2021-03-10 22:58:34,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:58:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:58:34,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:34,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:34,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-10 22:58:34,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700495337] [2021-03-10 22:58:34,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:58:34,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:34,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:58:34,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:58:34,529 INFO L87 Difference]: Start difference. First operand 141 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:34,785 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-03-10 22:58:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:58:34,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 22:58:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:34,787 INFO L225 Difference]: With dead ends: 321 [2021-03-10 22:58:34,787 INFO L226 Difference]: Without dead ends: 317 [2021-03-10 22:58:34,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:58:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-03-10 22:58:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-03-10 22:58:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-03-10 22:58:34,797 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-03-10 22:58:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:34,798 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-03-10 22:58:34,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-03-10 22:58:34,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:58:34,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:34,801 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:35,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 22:58:35,016 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1440957093, now seen corresponding path program 8 times [2021-03-10 22:58:35,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:35,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115114505] [2021-03-10 22:58:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:35,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115114505] [2021-03-10 22:58:35,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235019528] [2021-03-10 22:58:35,111 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:35,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:58:35,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:35,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:58:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:35,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:35,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-10 22:58:35,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871304725] [2021-03-10 22:58:35,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:58:35,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:35,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:58:35,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:58:35,343 INFO L87 Difference]: Start difference. First operand 173 states and 374 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:35,829 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-03-10 22:58:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:58:35,829 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:58:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:35,832 INFO L225 Difference]: With dead ends: 435 [2021-03-10 22:58:35,832 INFO L226 Difference]: Without dead ends: 417 [2021-03-10 22:58:35,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:58:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-03-10 22:58:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-03-10 22:58:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-03-10 22:58:35,838 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-03-10 22:58:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:35,838 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-03-10 22:58:35,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-03-10 22:58:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:58:35,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:35,839 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:36,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 22:58:36,055 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:36,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:36,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 9 times [2021-03-10 22:58:36,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:36,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194896043] [2021-03-10 22:58:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:36,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194896043] [2021-03-10 22:58:36,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492755331] [2021-03-10 22:58:36,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:58:36,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:58:36,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:36,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:58:36,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:36,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:36,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-03-10 22:58:36,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632958636] [2021-03-10 22:58:36,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:58:36,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:36,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:58:36,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:58:36,293 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 22:58:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:36,792 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-03-10 22:58:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:58:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 22:58:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:36,793 INFO L225 Difference]: With dead ends: 340 [2021-03-10 22:58:36,793 INFO L226 Difference]: Without dead ends: 336 [2021-03-10 22:58:36,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 448.3ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:58:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-03-10 22:58:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-03-10 22:58:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-03-10 22:58:36,802 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-03-10 22:58:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:36,802 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-03-10 22:58:36,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 22:58:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-03-10 22:58:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:36,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:36,803 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:37,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:37,017 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:37,017 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 10 times [2021-03-10 22:58:37,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:37,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006569072] [2021-03-10 22:58:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:37,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006569072] [2021-03-10 22:58:37,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228383498] [2021-03-10 22:58:37,079 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 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 22:58:37,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:58:37,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:37,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:58:37,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:37,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:37,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 22:58:37,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158918675] [2021-03-10 22:58:37,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:58:37,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:37,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:58:37,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:58:37,172 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:37,201 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-03-10 22:58:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:58:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:58:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:37,205 INFO L225 Difference]: With dead ends: 354 [2021-03-10 22:58:37,205 INFO L226 Difference]: Without dead ends: 321 [2021-03-10 22:58:37,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:58:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-03-10 22:58:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-03-10 22:58:37,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-03-10 22:58:37,213 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-03-10 22:58:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:37,213 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-03-10 22:58:37,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-03-10 22:58:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:37,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:37,214 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:37,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:37,433 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:37,433 INFO L82 PathProgramCache]: Analyzing trace with hash -971796299, now seen corresponding path program 11 times [2021-03-10 22:58:37,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:37,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091361819] [2021-03-10 22:58:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:37,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091361819] [2021-03-10 22:58:37,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524259787] [2021-03-10 22:58:37,564 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 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 22:58:37,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:58:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 22:58:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:37,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:37,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 22:58:37,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961988295] [2021-03-10 22:58:37,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:58:37,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:37,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:58:37,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:58:37,781 INFO L87 Difference]: Start difference. First operand 242 states and 531 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:38,514 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-03-10 22:58:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:58:38,514 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:58:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:38,517 INFO L225 Difference]: With dead ends: 559 [2021-03-10 22:58:38,517 INFO L226 Difference]: Without dead ends: 553 [2021-03-10 22:58:38,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:58:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-03-10 22:58:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-03-10 22:58:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-03-10 22:58:38,528 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-03-10 22:58:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:38,528 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-03-10 22:58:38,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-03-10 22:58:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:38,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:38,529 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:38,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 22:58:38,739 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:38,740 INFO L82 PathProgramCache]: Analyzing trace with hash -986406343, now seen corresponding path program 12 times [2021-03-10 22:58:38,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:38,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695396967] [2021-03-10 22:58:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:38,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695396967] [2021-03-10 22:58:38,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306752628] [2021-03-10 22:58:38,853 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 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 22:58:38,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:58:38,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:58:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:39,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:39,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 22:58:39,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739888522] [2021-03-10 22:58:39,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:58:39,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:39,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:58:39,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:58:39,072 INFO L87 Difference]: Start difference. First operand 234 states and 514 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:39,801 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-03-10 22:58:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:58:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:58:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:39,805 INFO L225 Difference]: With dead ends: 976 [2021-03-10 22:58:39,805 INFO L226 Difference]: Without dead ends: 940 [2021-03-10 22:58:39,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 631.3ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:58:39,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-03-10 22:58:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-03-10 22:58:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-03-10 22:58:39,816 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-03-10 22:58:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:39,816 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-03-10 22:58:39,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-03-10 22:58:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:39,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:39,817 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:40,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 22:58:40,034 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1716772253, now seen corresponding path program 13 times [2021-03-10 22:58:40,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:40,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026705604] [2021-03-10 22:58:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:40,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026705604] [2021-03-10 22:58:40,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158636919] [2021-03-10 22:58:40,115 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 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 22:58:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:58:40,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:40,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:40,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 22:58:40,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778656712] [2021-03-10 22:58:40,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:58:40,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:40,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:58:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:58:40,390 INFO L87 Difference]: Start difference. First operand 311 states and 691 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:41,131 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-03-10 22:58:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:58:41,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:58:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:41,134 INFO L225 Difference]: With dead ends: 802 [2021-03-10 22:58:41,134 INFO L226 Difference]: Without dead ends: 794 [2021-03-10 22:58:41,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 663.0ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 22:58:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-03-10 22:58:41,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-03-10 22:58:41,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-03-10 22:58:41,144 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-03-10 22:58:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:41,144 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-03-10 22:58:41,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-03-10 22:58:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:58:41,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:41,145 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:41,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:58:41,356 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:41,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1154698655, now seen corresponding path program 14 times [2021-03-10 22:58:41,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:41,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559069811] [2021-03-10 22:58:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:41,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559069811] [2021-03-10 22:58:41,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859441320] [2021-03-10 22:58:41,459 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:58:41,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:58:41,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:41,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:58:41,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:41,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:41,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:58:41,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306748071] [2021-03-10 22:58:41,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:58:41,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:58:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:58:41,717 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 22:58:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:42,487 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-03-10 22:58:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 22:58:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 29 [2021-03-10 22:58:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:42,489 INFO L225 Difference]: With dead ends: 680 [2021-03-10 22:58:42,489 INFO L226 Difference]: Without dead ends: 638 [2021-03-10 22:58:42,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 693.7ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 22:58:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-03-10 22:58:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-03-10 22:58:42,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-03-10 22:58:42,498 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-03-10 22:58:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:42,498 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-03-10 22:58:42,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 22:58:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-03-10 22:58:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:58:42,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:42,499 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:42,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:42,715 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:42,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1411544923, now seen corresponding path program 15 times [2021-03-10 22:58:42,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:42,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434618304] [2021-03-10 22:58:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:42,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434618304] [2021-03-10 22:58:42,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877314742] [2021-03-10 22:58:42,769 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:42,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:58:42,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:58:42,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:42,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:42,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-03-10 22:58:42,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133444063] [2021-03-10 22:58:42,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:58:42,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:42,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:58:42,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:58:42,988 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:43,648 INFO L93 Difference]: Finished difference Result 520 states and 1058 transitions. [2021-03-10 22:58:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 22:58:43,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:58:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:43,650 INFO L225 Difference]: With dead ends: 520 [2021-03-10 22:58:43,650 INFO L226 Difference]: Without dead ends: 516 [2021-03-10 22:58:43,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 646.2ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:58:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-03-10 22:58:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 270. [2021-03-10 22:58:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-03-10 22:58:43,659 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-03-10 22:58:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:43,660 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-03-10 22:58:43,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-03-10 22:58:43,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:58:43,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:43,661 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:43,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:43,878 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 16 times [2021-03-10 22:58:43,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:43,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665407020] [2021-03-10 22:58:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:43,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665407020] [2021-03-10 22:58:43,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253048964] [2021-03-10 22:58:43,941 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:58:43,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:58:43,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 22:58:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:44,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:44,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 22:58:44,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756189440] [2021-03-10 22:58:44,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:58:44,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:44,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:58:44,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:58:44,025 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:44,083 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-03-10 22:58:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:58:44,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 22:58:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:44,085 INFO L225 Difference]: With dead ends: 492 [2021-03-10 22:58:44,085 INFO L226 Difference]: Without dead ends: 453 [2021-03-10 22:58:44,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:58:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-03-10 22:58:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-03-10 22:58:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-03-10 22:58:44,092 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-03-10 22:58:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:44,092 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-03-10 22:58:44,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-03-10 22:58:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:58:44,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:44,093 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:44,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:44,312 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:44,312 INFO L82 PathProgramCache]: Analyzing trace with hash -791401487, now seen corresponding path program 17 times [2021-03-10 22:58:44,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:44,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057799432] [2021-03-10 22:58:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:44,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057799432] [2021-03-10 22:58:44,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110727420] [2021-03-10 22:58:44,447 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 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 22:58:44,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:58:44,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:44,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:58:44,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:44,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:44,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-03-10 22:58:44,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682529409] [2021-03-10 22:58:44,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:58:44,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:44,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:58:44,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:58:44,718 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 22:58:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:45,755 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-03-10 22:58:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:58:45,755 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 31 [2021-03-10 22:58:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:45,758 INFO L225 Difference]: With dead ends: 772 [2021-03-10 22:58:45,758 INFO L226 Difference]: Without dead ends: 766 [2021-03-10 22:58:45,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 887.3ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 22:58:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-03-10 22:58:45,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-03-10 22:58:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-03-10 22:58:45,770 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-03-10 22:58:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:45,770 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-03-10 22:58:45,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 22:58:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-03-10 22:58:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:58:45,771 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:45,771 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:45,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 22:58:45,972 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:45,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1870213771, now seen corresponding path program 18 times [2021-03-10 22:58:45,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:45,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151782145] [2021-03-10 22:58:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:46,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151782145] [2021-03-10 22:58:46,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576961390] [2021-03-10 22:58:46,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:46,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:58:46,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:58:46,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:46,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:46,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:58:46,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530345780] [2021-03-10 22:58:46,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:58:46,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:46,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:58:46,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:58:46,358 INFO L87 Difference]: Start difference. First operand 328 states and 723 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 22:58:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:47,489 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-03-10 22:58:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 22:58:47,490 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 31 [2021-03-10 22:58:47,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:47,493 INFO L225 Difference]: With dead ends: 1342 [2021-03-10 22:58:47,493 INFO L226 Difference]: Without dead ends: 1318 [2021-03-10 22:58:47,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 923.1ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-03-10 22:58:47,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-03-10 22:58:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-03-10 22:58:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-03-10 22:58:47,504 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-03-10 22:58:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:47,505 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-03-10 22:58:47,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 22:58:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-03-10 22:58:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:58:47,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:47,505 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:47,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 22:58:47,719 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:47,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1694387615, now seen corresponding path program 19 times [2021-03-10 22:58:47,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:47,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074414250] [2021-03-10 22:58:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:47,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074414250] [2021-03-10 22:58:47,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664015969] [2021-03-10 22:58:47,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:58:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:58:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:48,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:48,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 22:58:48,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431352239] [2021-03-10 22:58:48,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:58:48,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:48,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:58:48,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:58:48,082 INFO L87 Difference]: Start difference. First operand 404 states and 908 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 22:58:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:49,108 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-03-10 22:58:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:58:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 31 [2021-03-10 22:58:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:49,112 INFO L225 Difference]: With dead ends: 1094 [2021-03-10 22:58:49,112 INFO L226 Difference]: Without dead ends: 1090 [2021-03-10 22:58:49,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 882.3ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 22:58:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-03-10 22:58:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-03-10 22:58:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-03-10 22:58:49,121 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-03-10 22:58:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:49,121 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-03-10 22:58:49,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 22:58:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-03-10 22:58:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:58:49,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:49,122 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:49,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 22:58:49,335 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:49,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1317542905, now seen corresponding path program 20 times [2021-03-10 22:58:49,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:49,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436599891] [2021-03-10 22:58:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:49,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436599891] [2021-03-10 22:58:49,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616805311] [2021-03-10 22:58:49,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:49,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:58:49,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:49,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 22:58:49,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:49,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:49,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-03-10 22:58:49,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429746814] [2021-03-10 22:58:49,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:58:49,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:49,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:58:49,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:58:49,704 INFO L87 Difference]: Start difference. First operand 333 states and 737 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 22:58:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:50,570 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-03-10 22:58:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:58:50,571 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 31 [2021-03-10 22:58:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:50,575 INFO L225 Difference]: With dead ends: 1727 [2021-03-10 22:58:50,575 INFO L226 Difference]: Without dead ends: 1631 [2021-03-10 22:58:50,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 778.5ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 22:58:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-03-10 22:58:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-03-10 22:58:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-03-10 22:58:50,587 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-03-10 22:58:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:50,587 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-03-10 22:58:50,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 22:58:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-03-10 22:58:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:58:50,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:50,588 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:50,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 22:58:50,803 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:50,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1208538321, now seen corresponding path program 21 times [2021-03-10 22:58:50,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:50,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602108811] [2021-03-10 22:58:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:50,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602108811] [2021-03-10 22:58:50,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605379088] [2021-03-10 22:58:50,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:58:50,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:58:50,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:58:50,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:51,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:51,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 22:58:51,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882354603] [2021-03-10 22:58:51,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:58:51,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:51,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:58:51,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:58:51,119 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 22:58:52,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:52,179 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-03-10 22:58:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 22:58:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 31 [2021-03-10 22:58:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:52,183 INFO L225 Difference]: With dead ends: 1314 [2021-03-10 22:58:52,183 INFO L226 Difference]: Without dead ends: 1310 [2021-03-10 22:58:52,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 962.8ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 22:58:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-03-10 22:58:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-03-10 22:58:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-03-10 22:58:52,208 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-03-10 22:58:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:52,209 INFO L480 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-03-10 22:58:52,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 22:58:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-03-10 22:58:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:58:52,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:52,210 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:52,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:52,416 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2054310883, now seen corresponding path program 22 times [2021-03-10 22:58:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:52,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165709693] [2021-03-10 22:58:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:52,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165709693] [2021-03-10 22:58:52,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635621232] [2021-03-10 22:58:52,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:58:52,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:58:52,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:52,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:58:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:52,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:52,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-03-10 22:58:52,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673319272] [2021-03-10 22:58:52,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 22:58:52,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:52,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 22:58:52,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:58:52,797 INFO L87 Difference]: Start difference. First operand 563 states and 1301 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 22:58:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:53,864 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-03-10 22:58:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 22:58:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 33 [2021-03-10 22:58:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:53,867 INFO L225 Difference]: With dead ends: 1171 [2021-03-10 22:58:53,867 INFO L226 Difference]: Without dead ends: 1099 [2021-03-10 22:58:53,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 985.1ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 22:58:53,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-03-10 22:58:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-03-10 22:58:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-03-10 22:58:53,878 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-03-10 22:58:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:53,878 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-03-10 22:58:53,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 22:58:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-03-10 22:58:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:58:53,879 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:53,879 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:54,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:54,095 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash -120770725, now seen corresponding path program 23 times [2021-03-10 22:58:54,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:54,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520584200] [2021-03-10 22:58:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:54,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520584200] [2021-03-10 22:58:54,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428545441] [2021-03-10 22:58:54,155 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 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 22:58:54,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:58:54,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:58:54,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:54,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:54,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-03-10 22:58:54,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853237022] [2021-03-10 22:58:54,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:58:54,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:54,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:58:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:58:54,424 INFO L87 Difference]: Start difference. First operand 572 states and 1314 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 22:58:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:55,928 INFO L93 Difference]: Finished difference Result 984 states and 2110 transitions. [2021-03-10 22:58:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 22:58:55,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 33 [2021-03-10 22:58:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:55,931 INFO L225 Difference]: With dead ends: 984 [2021-03-10 22:58:55,931 INFO L226 Difference]: Without dead ends: 980 [2021-03-10 22:58:55,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 1417.0ms TimeCoverageRelationStatistics Valid=1834, Invalid=5822, Unknown=0, NotChecked=0, Total=7656 [2021-03-10 22:58:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-03-10 22:58:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 572. [2021-03-10 22:58:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-03-10 22:58:55,944 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-03-10 22:58:55,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:55,944 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-03-10 22:58:55,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 22:58:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-03-10 22:58:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:58:55,945 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:55,945 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:56,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 22:58:56,146 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:56,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:56,146 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 24 times [2021-03-10 22:58:56,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:56,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655822222] [2021-03-10 22:58:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:56,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655822222] [2021-03-10 22:58:56,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902828700] [2021-03-10 22:58:56,227 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 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 22:58:56,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:58:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:56,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:58:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:56,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:56,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 22:58:56,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628863156] [2021-03-10 22:58:56,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:58:56,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:56,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:58:56,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:58:56,313 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:56,367 INFO L93 Difference]: Finished difference Result 922 states and 2046 transitions. [2021-03-10 22:58:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:58:56,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:58:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:56,369 INFO L225 Difference]: With dead ends: 922 [2021-03-10 22:58:56,369 INFO L226 Difference]: Without dead ends: 877 [2021-03-10 22:58:56,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:58:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-03-10 22:58:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 720. [2021-03-10 22:58:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 2.3379694019471486) internal successors, (1681), 719 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1681 transitions. [2021-03-10 22:58:56,380 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1681 transitions. Word has length 35 [2021-03-10 22:58:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:56,380 INFO L480 AbstractCegarLoop]: Abstraction has 720 states and 1681 transitions. [2021-03-10 22:58:56,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1681 transitions. [2021-03-10 22:58:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:58:56,381 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:56,381 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:56,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:56,597 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:56,598 INFO L82 PathProgramCache]: Analyzing trace with hash 615463213, now seen corresponding path program 25 times [2021-03-10 22:58:56,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:56,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828962333] [2021-03-10 22:58:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:56,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828962333] [2021-03-10 22:58:56,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900881618] [2021-03-10 22:58:56,770 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 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 22:58:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:56,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:58:56,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:57,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:57,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-03-10 22:58:57,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576384002] [2021-03-10 22:58:57,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 22:58:57,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 22:58:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:58:57,116 INFO L87 Difference]: Start difference. First operand 720 states and 1681 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:58,498 INFO L93 Difference]: Finished difference Result 1286 states and 2740 transitions. [2021-03-10 22:58:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 22:58:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:58:58,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:58,502 INFO L225 Difference]: With dead ends: 1286 [2021-03-10 22:58:58,502 INFO L226 Difference]: Without dead ends: 1280 [2021-03-10 22:58:58,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 1214.3ms TimeCoverageRelationStatistics Valid=612, Invalid=4218, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 22:58:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-03-10 22:58:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 707. [2021-03-10 22:58:58,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 2.3427762039660056) internal successors, (1654), 706 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1654 transitions. [2021-03-10 22:58:58,513 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1654 transitions. Word has length 35 [2021-03-10 22:58:58,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:58,513 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 1654 transitions. [2021-03-10 22:58:58,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1654 transitions. [2021-03-10 22:58:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:58:58,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:58,515 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:58,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 22:58:58,730 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:58,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:58,730 INFO L82 PathProgramCache]: Analyzing trace with hash -959485263, now seen corresponding path program 26 times [2021-03-10 22:58:58,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:58,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316496930] [2021-03-10 22:58:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:58,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316496930] [2021-03-10 22:58:58,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149056566] [2021-03-10 22:58:58,841 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:58:58,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:58:58,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:58,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:58:58,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:59,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:59,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-03-10 22:58:59,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756318158] [2021-03-10 22:58:59,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 22:58:59,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:59,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 22:58:59,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:58:59,155 INFO L87 Difference]: Start difference. First operand 707 states and 1654 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:00,836 INFO L93 Difference]: Finished difference Result 2198 states and 4644 transitions. [2021-03-10 22:59:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 22:59:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:59:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:00,842 INFO L225 Difference]: With dead ends: 2198 [2021-03-10 22:59:00,842 INFO L226 Difference]: Without dead ends: 2174 [2021-03-10 22:59:00,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1283.5ms TimeCoverageRelationStatistics Valid=967, Invalid=5353, Unknown=0, NotChecked=0, Total=6320 [2021-03-10 22:59:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-03-10 22:59:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 830. [2021-03-10 22:59:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.365500603136309) internal successors, (1961), 829 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1961 transitions. [2021-03-10 22:59:00,857 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1961 transitions. Word has length 35 [2021-03-10 22:59:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:00,857 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 1961 transitions. [2021-03-10 22:59:00,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1961 transitions. [2021-03-10 22:59:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:59:00,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:00,858 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:01,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 22:59:01,071 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:01,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1689851173, now seen corresponding path program 27 times [2021-03-10 22:59:01,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:01,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392919438] [2021-03-10 22:59:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:01,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392919438] [2021-03-10 22:59:01,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124915531] [2021-03-10 22:59:01,212 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 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 22:59:01,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 22:59:01,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:01,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:59:01,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:01,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:01,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-03-10 22:59:01,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670870861] [2021-03-10 22:59:01,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:59:01,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:01,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:59:01,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:59:01,512 INFO L87 Difference]: Start difference. First operand 830 states and 1961 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:02,125 INFO L93 Difference]: Finished difference Result 1909 states and 4177 transitions. [2021-03-10 22:59:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:59:02,126 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:59:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:02,131 INFO L225 Difference]: With dead ends: 1909 [2021-03-10 22:59:02,131 INFO L226 Difference]: Without dead ends: 1905 [2021-03-10 22:59:02,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 631.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:59:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-03-10 22:59:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 891. [2021-03-10 22:59:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.344943820224719) internal successors, (2087), 890 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2087 transitions. [2021-03-10 22:59:02,147 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2087 transitions. Word has length 35 [2021-03-10 22:59:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:02,147 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 2087 transitions. [2021-03-10 22:59:02,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2087 transitions. [2021-03-10 22:59:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:59:02,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:02,149 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:02,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 22:59:02,364 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2112206539, now seen corresponding path program 28 times [2021-03-10 22:59:02,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:02,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850831474] [2021-03-10 22:59:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:02,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850831474] [2021-03-10 22:59:02,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395944513] [2021-03-10 22:59:02,482 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 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 22:59:02,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:59:02,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:02,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:59:02,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:02,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:02,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-03-10 22:59:02,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177404879] [2021-03-10 22:59:02,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 22:59:02,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:02,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 22:59:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:59:02,810 INFO L87 Difference]: Start difference. First operand 891 states and 2087 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:04,483 INFO L93 Difference]: Finished difference Result 2946 states and 6225 transitions. [2021-03-10 22:59:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 22:59:04,484 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:59:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:04,491 INFO L225 Difference]: With dead ends: 2946 [2021-03-10 22:59:04,491 INFO L226 Difference]: Without dead ends: 2850 [2021-03-10 22:59:04,492 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1390.2ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 22:59:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-03-10 22:59:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 850. [2021-03-10 22:59:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.3568904593639575) internal successors, (2001), 849 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2001 transitions. [2021-03-10 22:59:04,511 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2001 transitions. Word has length 35 [2021-03-10 22:59:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:04,511 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 2001 transitions. [2021-03-10 22:59:04,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2001 transitions. [2021-03-10 22:59:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:59:04,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:04,512 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:04,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 22:59:04,727 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:04,728 INFO L82 PathProgramCache]: Analyzing trace with hash -102132551, now seen corresponding path program 29 times [2021-03-10 22:59:04,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:04,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223926059] [2021-03-10 22:59:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:04,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223926059] [2021-03-10 22:59:04,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211629703] [2021-03-10 22:59:04,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:59:04,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:59:04,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:04,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 22:59:04,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:05,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:05,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:05,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955669693] [2021-03-10 22:59:05,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:05,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:05,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:05,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:05,185 INFO L87 Difference]: Start difference. First operand 850 states and 2001 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:06,706 INFO L93 Difference]: Finished difference Result 3270 states and 6974 transitions. [2021-03-10 22:59:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-10 22:59:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:59:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:06,714 INFO L225 Difference]: With dead ends: 3270 [2021-03-10 22:59:06,714 INFO L226 Difference]: Without dead ends: 3096 [2021-03-10 22:59:06,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 1362.4ms TimeCoverageRelationStatistics Valid=1489, Invalid=5993, Unknown=0, NotChecked=0, Total=7482 [2021-03-10 22:59:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-03-10 22:59:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 889. [2021-03-10 22:59:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.2905405405405403) internal successors, (2034), 888 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2034 transitions. [2021-03-10 22:59:06,737 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2034 transitions. Word has length 35 [2021-03-10 22:59:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:06,738 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2034 transitions. [2021-03-10 22:59:06,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2034 transitions. [2021-03-10 22:59:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:59:06,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:06,739 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:06,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 22:59:06,943 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:06,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:06,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1129387925, now seen corresponding path program 30 times [2021-03-10 22:59:06,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:06,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740148098] [2021-03-10 22:59:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:07,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740148098] [2021-03-10 22:59:07,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018923351] [2021-03-10 22:59:07,031 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 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 22:59:07,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 22:59:07,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:07,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:59:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:07,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:07,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-03-10 22:59:07,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135087176] [2021-03-10 22:59:07,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:59:07,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:07,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:59:07,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:59:07,361 INFO L87 Difference]: Start difference. First operand 889 states and 2034 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 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 22:59:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:08,653 INFO L93 Difference]: Finished difference Result 2421 states and 5273 transitions. [2021-03-10 22:59:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 22:59:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:59:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:08,657 INFO L225 Difference]: With dead ends: 2421 [2021-03-10 22:59:08,657 INFO L226 Difference]: Without dead ends: 2417 [2021-03-10 22:59:08,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 1239.3ms TimeCoverageRelationStatistics Valid=1155, Invalid=4851, Unknown=0, NotChecked=0, Total=6006 [2021-03-10 22:59:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-03-10 22:59:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 742. [2021-03-10 22:59:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.2672064777327936) internal successors, (1680), 741 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1680 transitions. [2021-03-10 22:59:08,670 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1680 transitions. Word has length 35 [2021-03-10 22:59:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:08,671 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 1680 transitions. [2021-03-10 22:59:08,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 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 22:59:08,671 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1680 transitions. [2021-03-10 22:59:08,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:59:08,672 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:08,672 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:08,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:08,884 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:08,884 INFO L82 PathProgramCache]: Analyzing trace with hash -826718247, now seen corresponding path program 31 times [2021-03-10 22:59:08,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:08,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399317745] [2021-03-10 22:59:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:09,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399317745] [2021-03-10 22:59:09,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038871176] [2021-03-10 22:59:09,008 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 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 22:59:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:09,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 22:59:09,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:09,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:09,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-03-10 22:59:09,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441157755] [2021-03-10 22:59:09,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 22:59:09,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:09,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 22:59:09,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:59:09,331 INFO L87 Difference]: Start difference. First operand 742 states and 1680 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:10,868 INFO L93 Difference]: Finished difference Result 1553 states and 3227 transitions. [2021-03-10 22:59:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 22:59:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:59:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:10,870 INFO L225 Difference]: With dead ends: 1553 [2021-03-10 22:59:10,870 INFO L226 Difference]: Without dead ends: 1445 [2021-03-10 22:59:10,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 1432.3ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-03-10 22:59:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-03-10 22:59:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 749. [2021-03-10 22:59:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.2553475935828877) internal successors, (1687), 748 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1687 transitions. [2021-03-10 22:59:10,881 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1687 transitions. Word has length 37 [2021-03-10 22:59:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:10,881 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1687 transitions. [2021-03-10 22:59:10,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1687 transitions. [2021-03-10 22:59:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:59:10,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:10,882 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:11,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:11,095 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:11,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:11,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1330775973, now seen corresponding path program 32 times [2021-03-10 22:59:11,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:11,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193085638] [2021-03-10 22:59:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:11,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193085638] [2021-03-10 22:59:11,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822018243] [2021-03-10 22:59:11,167 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 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 22:59:11,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:59:11,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:11,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:59:11,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:11,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:11,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-03-10 22:59:11,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127231725] [2021-03-10 22:59:11,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:59:11,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:11,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:59:11,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:59:11,483 INFO L87 Difference]: Start difference. First operand 749 states and 1687 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:12,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:12,927 INFO L93 Difference]: Finished difference Result 1245 states and 2647 transitions. [2021-03-10 22:59:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 22:59:12,928 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:59:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:12,929 INFO L225 Difference]: With dead ends: 1245 [2021-03-10 22:59:12,929 INFO L226 Difference]: Without dead ends: 1241 [2021-03-10 22:59:12,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1374.7ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-03-10 22:59:12,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-03-10 22:59:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 749. [2021-03-10 22:59:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.2540106951871657) internal successors, (1686), 748 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1686 transitions. [2021-03-10 22:59:12,939 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1686 transitions. Word has length 37 [2021-03-10 22:59:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:12,939 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1686 transitions. [2021-03-10 22:59:12,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1686 transitions. [2021-03-10 22:59:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:59:12,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:12,940 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:13,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 22:59:13,143 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 33 times [2021-03-10 22:59:13,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:13,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924377812] [2021-03-10 22:59:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:13,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924377812] [2021-03-10 22:59:13,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780658850] [2021-03-10 22:59:13,222 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:13,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:59:13,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 22:59:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:13,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:13,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-03-10 22:59:13,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278545421] [2021-03-10 22:59:13,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:59:13,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:13,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:59:13,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:59:13,401 INFO L87 Difference]: Start difference. First operand 749 states and 1686 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:59:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:13,539 INFO L93 Difference]: Finished difference Result 1189 states and 2590 transitions. [2021-03-10 22:59:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:59:13,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 39 [2021-03-10 22:59:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:13,541 INFO L225 Difference]: With dead ends: 1189 [2021-03-10 22:59:13,541 INFO L226 Difference]: Without dead ends: 1129 [2021-03-10 22:59:13,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:59:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-03-10 22:59:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 895. [2021-03-10 22:59:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.2740492170022373) internal successors, (2033), 894 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2033 transitions. [2021-03-10 22:59:13,551 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2033 transitions. Word has length 39 [2021-03-10 22:59:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:13,551 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 2033 transitions. [2021-03-10 22:59:13,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:59:13,551 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2033 transitions. [2021-03-10 22:59:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:59:13,553 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:13,553 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:13,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:13,755 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:13,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:13,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1873377773, now seen corresponding path program 34 times [2021-03-10 22:59:13,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:13,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903638426] [2021-03-10 22:59:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:13,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903638426] [2021-03-10 22:59:13,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981362198] [2021-03-10 22:59:13,899 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 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 22:59:13,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:59:13,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:13,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:59:13,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:14,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:14,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-03-10 22:59:14,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399197156] [2021-03-10 22:59:14,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:14,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:14,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:14,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:14,302 INFO L87 Difference]: Start difference. First operand 895 states and 2033 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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 22:59:16,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:16,887 INFO L93 Difference]: Finished difference Result 2570 states and 5296 transitions. [2021-03-10 22:59:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 22:59:16,887 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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 39 [2021-03-10 22:59:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:16,904 INFO L225 Difference]: With dead ends: 2570 [2021-03-10 22:59:16,905 INFO L226 Difference]: Without dead ends: 2546 [2021-03-10 22:59:16,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 1764.7ms TimeCoverageRelationStatistics Valid=1214, Invalid=7906, Unknown=0, NotChecked=0, Total=9120 [2021-03-10 22:59:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-03-10 22:59:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 837. [2021-03-10 22:59:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.271531100478469) internal successors, (1899), 836 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1899 transitions. [2021-03-10 22:59:16,932 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1899 transitions. Word has length 39 [2021-03-10 22:59:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:16,932 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 1899 transitions. [2021-03-10 22:59:16,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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 22:59:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1899 transitions. [2021-03-10 22:59:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:59:16,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:16,933 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:17,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 22:59:17,147 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:17,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1143011863, now seen corresponding path program 35 times [2021-03-10 22:59:17,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:17,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309266554] [2021-03-10 22:59:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:17,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309266554] [2021-03-10 22:59:17,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144405225] [2021-03-10 22:59:17,271 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:17,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 22:59:17,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:59:17,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:17,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:17,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-03-10 22:59:17,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234358657] [2021-03-10 22:59:17,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 22:59:17,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:17,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 22:59:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:59:17,663 INFO L87 Difference]: Start difference. First operand 837 states and 1899 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:19,710 INFO L93 Difference]: Finished difference Result 1954 states and 4095 transitions. [2021-03-10 22:59:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 22:59:19,711 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 22:59:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:19,714 INFO L225 Difference]: With dead ends: 1954 [2021-03-10 22:59:19,714 INFO L226 Difference]: Without dead ends: 1950 [2021-03-10 22:59:19,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 1584.7ms TimeCoverageRelationStatistics Valid=923, Invalid=6217, Unknown=0, NotChecked=0, Total=7140 [2021-03-10 22:59:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-03-10 22:59:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 716. [2021-03-10 22:59:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.2545454545454544) internal successors, (1612), 715 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1612 transitions. [2021-03-10 22:59:19,727 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1612 transitions. Word has length 39 [2021-03-10 22:59:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:19,727 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1612 transitions. [2021-03-10 22:59:19,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1612 transitions. [2021-03-10 22:59:19,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:59:19,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:19,728 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:19,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:19,943 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:19,944 INFO L82 PathProgramCache]: Analyzing trace with hash -65410959, now seen corresponding path program 36 times [2021-03-10 22:59:19,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:19,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34076392] [2021-03-10 22:59:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:20,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34076392] [2021-03-10 22:59:20,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630371105] [2021-03-10 22:59:20,092 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 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 22:59:20,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 22:59:20,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:20,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:59:20,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:20,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:20,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-03-10 22:59:20,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951799009] [2021-03-10 22:59:20,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 22:59:20,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:20,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 22:59:20,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:59:20,488 INFO L87 Difference]: Start difference. First operand 716 states and 1612 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 22:59:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:23,034 INFO L93 Difference]: Finished difference Result 3253 states and 6664 transitions. [2021-03-10 22:59:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 22:59:23,034 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 39 [2021-03-10 22:59:23,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:23,038 INFO L225 Difference]: With dead ends: 3253 [2021-03-10 22:59:23,038 INFO L226 Difference]: Without dead ends: 3205 [2021-03-10 22:59:23,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3598 ImplicationChecksByTransitivity, 2066.2ms TimeCoverageRelationStatistics Valid=1716, Invalid=9204, Unknown=0, NotChecked=0, Total=10920 [2021-03-10 22:59:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2021-03-10 22:59:23,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 718. [2021-03-10 22:59:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 2.2538354253835426) internal successors, (1616), 717 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1616 transitions. [2021-03-10 22:59:23,056 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1616 transitions. Word has length 39 [2021-03-10 22:59:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:23,056 INFO L480 AbstractCegarLoop]: Abstraction has 718 states and 1616 transitions. [2021-03-10 22:59:23,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 22:59:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1616 transitions. [2021-03-10 22:59:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:59:23,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:23,057 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:23,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-10 22:59:23,263 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:23,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1846885387, now seen corresponding path program 37 times [2021-03-10 22:59:23,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:23,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460357749] [2021-03-10 22:59:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:23,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460357749] [2021-03-10 22:59:23,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035032730] [2021-03-10 22:59:23,425 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:23,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:59:23,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:23,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:23,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 22:59:23,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641252914] [2021-03-10 22:59:23,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 22:59:23,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 22:59:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:59:23,863 INFO L87 Difference]: Start difference. First operand 718 states and 1616 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 22:59:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:26,006 INFO L93 Difference]: Finished difference Result 4064 states and 8310 transitions. [2021-03-10 22:59:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 22:59:26,006 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 39 [2021-03-10 22:59:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:26,010 INFO L225 Difference]: With dead ends: 4064 [2021-03-10 22:59:26,010 INFO L226 Difference]: Without dead ends: 3938 [2021-03-10 22:59:26,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1729.9ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-03-10 22:59:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-03-10 22:59:26,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 864. [2021-03-10 22:59:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.275782155272306) internal successors, (1964), 863 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1964 transitions. [2021-03-10 22:59:26,030 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1964 transitions. Word has length 39 [2021-03-10 22:59:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:26,030 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 1964 transitions. [2021-03-10 22:59:26,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 22:59:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1964 transitions. [2021-03-10 22:59:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:59:26,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:26,032 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:26,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 22:59:26,247 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:26,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1920611207, now seen corresponding path program 38 times [2021-03-10 22:59:26,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:26,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917688236] [2021-03-10 22:59:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:26,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917688236] [2021-03-10 22:59:26,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670084466] [2021-03-10 22:59:26,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:59:26,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:59:26,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:26,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:59:26,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:26,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:26,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 22:59:26,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316173129] [2021-03-10 22:59:26,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 22:59:26,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:26,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 22:59:26,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:59:26,850 INFO L87 Difference]: Start difference. First operand 864 states and 1964 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 22:59:29,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:29,063 INFO L93 Difference]: Finished difference Result 4076 states and 8364 transitions. [2021-03-10 22:59:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 22:59:29,063 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 39 [2021-03-10 22:59:29,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:29,068 INFO L225 Difference]: With dead ends: 4076 [2021-03-10 22:59:29,068 INFO L226 Difference]: Without dead ends: 3776 [2021-03-10 22:59:29,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3864 ImplicationChecksByTransitivity, 2038.4ms TimeCoverageRelationStatistics Valid=2308, Invalid=9248, Unknown=0, NotChecked=0, Total=11556 [2021-03-10 22:59:29,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-03-10 22:59:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 858. [2021-03-10 22:59:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.2602100350058345) internal successors, (1937), 857 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1937 transitions. [2021-03-10 22:59:29,087 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1937 transitions. Word has length 39 [2021-03-10 22:59:29,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:29,087 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 1937 transitions. [2021-03-10 22:59:29,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 22:59:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1937 transitions. [2021-03-10 22:59:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:59:29,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:29,088 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:29,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:29,299 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:29,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1859314999, now seen corresponding path program 39 times [2021-03-10 22:59:29,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:29,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296959340] [2021-03-10 22:59:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296959340] [2021-03-10 22:59:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020770885] [2021-03-10 22:59:29,390 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 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 22:59:29,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 22:59:29,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:29,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:59:29,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:29,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:29,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-03-10 22:59:29,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171914716] [2021-03-10 22:59:29,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 22:59:29,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:29,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 22:59:29,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:59:29,828 INFO L87 Difference]: Start difference. First operand 858 states and 1937 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:32,522 INFO L93 Difference]: Finished difference Result 2927 states and 6237 transitions. [2021-03-10 22:59:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-03-10 22:59:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 22:59:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:32,526 INFO L225 Difference]: With dead ends: 2927 [2021-03-10 22:59:32,526 INFO L226 Difference]: Without dead ends: 2923 [2021-03-10 22:59:32,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2507.4ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-03-10 22:59:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-03-10 22:59:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1133. [2021-03-10 22:59:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 2.325088339222615) internal successors, (2632), 1132 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2632 transitions. [2021-03-10 22:59:32,544 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2632 transitions. Word has length 39 [2021-03-10 22:59:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:32,544 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 2632 transitions. [2021-03-10 22:59:32,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2632 transitions. [2021-03-10 22:59:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:59:32,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:32,545 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:32,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:32,759 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash -605917803, now seen corresponding path program 40 times [2021-03-10 22:59:32,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:32,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351706947] [2021-03-10 22:59:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:32,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351706947] [2021-03-10 22:59:32,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209285612] [2021-03-10 22:59:32,939 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 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 22:59:32,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:59:32,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:59:32,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:33,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:33,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-03-10 22:59:33,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576939362] [2021-03-10 22:59:33,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 22:59:33,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:33,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 22:59:33,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:59:33,382 INFO L87 Difference]: Start difference. First operand 1133 states and 2632 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:35,780 INFO L93 Difference]: Finished difference Result 2199 states and 4675 transitions. [2021-03-10 22:59:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 22:59:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:59:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:35,782 INFO L225 Difference]: With dead ends: 2199 [2021-03-10 22:59:35,782 INFO L226 Difference]: Without dead ends: 2049 [2021-03-10 22:59:35,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4141 ImplicationChecksByTransitivity, 2153.6ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-03-10 22:59:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-03-10 22:59:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1138. [2021-03-10 22:59:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 2.3157431838170623) internal successors, (2633), 1137 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 2633 transitions. [2021-03-10 22:59:35,796 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 2633 transitions. Word has length 41 [2021-03-10 22:59:35,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:35,796 INFO L480 AbstractCegarLoop]: Abstraction has 1138 states and 2633 transitions. [2021-03-10 22:59:35,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 2633 transitions. [2021-03-10 22:59:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:59:35,798 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:35,798 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:36,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:36,011 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:36,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1410601563, now seen corresponding path program 41 times [2021-03-10 22:59:36,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:36,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565290678] [2021-03-10 22:59:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:36,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565290678] [2021-03-10 22:59:36,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576923350] [2021-03-10 22:59:36,111 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 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 22:59:36,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 22:59:36,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:36,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:59:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:36,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:36,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 28 [2021-03-10 22:59:36,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185938214] [2021-03-10 22:59:36,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 22:59:36,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:36,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 22:59:36,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:59:36,553 INFO L87 Difference]: Start difference. First operand 1138 states and 2633 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 22:59:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:40,356 INFO L93 Difference]: Finished difference Result 1915 states and 4151 transitions. [2021-03-10 22:59:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-03-10 22:59:40,356 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:59:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:40,358 INFO L225 Difference]: With dead ends: 1915 [2021-03-10 22:59:40,358 INFO L226 Difference]: Without dead ends: 1911 [2021-03-10 22:59:40,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8672 ImplicationChecksByTransitivity, 3611.2ms TimeCoverageRelationStatistics Valid=4990, Invalid=17062, Unknown=0, NotChecked=0, Total=22052 [2021-03-10 22:59:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-03-10 22:59:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1114. [2021-03-10 22:59:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.321653189577718) internal successors, (2584), 1113 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 2584 transitions. [2021-03-10 22:59:40,373 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 2584 transitions. Word has length 41 [2021-03-10 22:59:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:40,373 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 2584 transitions. [2021-03-10 22:59:40,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 22:59:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 2584 transitions. [2021-03-10 22:59:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:59:40,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:40,374 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:40,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 22:59:40,580 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1582316395, now seen corresponding path program 42 times [2021-03-10 22:59:40,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:40,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740706866] [2021-03-10 22:59:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:59:40,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740706866] [2021-03-10 22:59:40,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286498174] [2021-03-10 22:59:40,684 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:40,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 22:59:40,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:40,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:59:40,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:41,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:41,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-03-10 22:59:41,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34117840] [2021-03-10 22:59:41,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 22:59:41,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:41,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 22:59:41,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:59:41,161 INFO L87 Difference]: Start difference. First operand 1114 states and 2584 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:43,653 INFO L93 Difference]: Finished difference Result 3697 states and 8046 transitions. [2021-03-10 22:59:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-03-10 22:59:43,653 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:59:43,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:43,657 INFO L225 Difference]: With dead ends: 3697 [2021-03-10 22:59:43,657 INFO L226 Difference]: Without dead ends: 3697 [2021-03-10 22:59:43,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2941 ImplicationChecksByTransitivity, 2231.8ms TimeCoverageRelationStatistics Valid=2386, Invalid=7316, Unknown=0, NotChecked=0, Total=9702 [2021-03-10 22:59:43,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2021-03-10 22:59:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 2061. [2021-03-10 22:59:43,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 2.3907766990291264) internal successors, (4925), 2060 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 4925 transitions. [2021-03-10 22:59:43,690 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 4925 transitions. Word has length 41 [2021-03-10 22:59:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:43,690 INFO L480 AbstractCegarLoop]: Abstraction has 2061 states and 4925 transitions. [2021-03-10 22:59:43,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 4925 transitions. [2021-03-10 22:59:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:43,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:43,692 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:43,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:43,908 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:43,908 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 43 times [2021-03-10 22:59:43,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:43,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756360042] [2021-03-10 22:59:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:44,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756360042] [2021-03-10 22:59:44,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834719640] [2021-03-10 22:59:44,027 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:44,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:59:44,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:44,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:44,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 22:59:44,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704071088] [2021-03-10 22:59:44,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:59:44,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:59:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:59:44,137 INFO L87 Difference]: Start difference. First operand 2061 states and 4925 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:44,245 INFO L93 Difference]: Finished difference Result 2922 states and 6927 transitions. [2021-03-10 22:59:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:59:44,245 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:44,249 INFO L225 Difference]: With dead ends: 2922 [2021-03-10 22:59:44,249 INFO L226 Difference]: Without dead ends: 2865 [2021-03-10 22:59:44,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:59:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-03-10 22:59:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2632. [2021-03-10 22:59:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.4401368301026225) internal successors, (6420), 2631 states have internal predecessors, (6420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6420 transitions. [2021-03-10 22:59:44,285 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6420 transitions. Word has length 43 [2021-03-10 22:59:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:44,285 INFO L480 AbstractCegarLoop]: Abstraction has 2632 states and 6420 transitions. [2021-03-10 22:59:44,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6420 transitions. [2021-03-10 22:59:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:44,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:44,289 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:44,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:44,503 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:44,503 INFO L82 PathProgramCache]: Analyzing trace with hash -735053015, now seen corresponding path program 44 times [2021-03-10 22:59:44,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:44,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106725450] [2021-03-10 22:59:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:44,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106725450] [2021-03-10 22:59:44,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278470742] [2021-03-10 22:59:44,717 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 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 22:59:44,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:59:44,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:44,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 22:59:44,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:45,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:45,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-03-10 22:59:45,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391679310] [2021-03-10 22:59:45,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 22:59:45,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 22:59:45,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:59:45,252 INFO L87 Difference]: Start difference. First operand 2632 states and 6420 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:48,938 INFO L93 Difference]: Finished difference Result 5778 states and 12992 transitions. [2021-03-10 22:59:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 22:59:48,938 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:48,945 INFO L225 Difference]: With dead ends: 5778 [2021-03-10 22:59:48,945 INFO L226 Difference]: Without dead ends: 5745 [2021-03-10 22:59:48,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 2553.6ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-03-10 22:59:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-03-10 22:59:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 2946. [2021-03-10 22:59:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 2.447198641765705) internal successors, (7207), 2945 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 7207 transitions. [2021-03-10 22:59:48,991 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 7207 transitions. Word has length 43 [2021-03-10 22:59:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:48,992 INFO L480 AbstractCegarLoop]: Abstraction has 2946 states and 7207 transitions. [2021-03-10 22:59:48,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 7207 transitions. [2021-03-10 22:59:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:48,995 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:48,995 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:49,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 22:59:49,210 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:49,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1465418925, now seen corresponding path program 45 times [2021-03-10 22:59:49,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:49,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878516144] [2021-03-10 22:59:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:49,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878516144] [2021-03-10 22:59:49,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671428233] [2021-03-10 22:59:49,377 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 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 22:59:49,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 22:59:49,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:49,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 22:59:49,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:49,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:49,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-03-10 22:59:49,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064541089] [2021-03-10 22:59:49,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 22:59:49,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:49,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 22:59:49,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:59:49,912 INFO L87 Difference]: Start difference. First operand 2946 states and 7207 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:53,136 INFO L93 Difference]: Finished difference Result 4729 states and 10915 transitions. [2021-03-10 22:59:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 22:59:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:53,141 INFO L225 Difference]: With dead ends: 4729 [2021-03-10 22:59:53,141 INFO L226 Difference]: Without dead ends: 4725 [2021-03-10 22:59:53,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 2252.9ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-03-10 22:59:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4725 states. [2021-03-10 22:59:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4725 to 2852. [2021-03-10 22:59:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 2.4387934058225182) internal successors, (6953), 2851 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 6953 transitions. [2021-03-10 22:59:53,176 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 6953 transitions. Word has length 43 [2021-03-10 22:59:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:53,176 INFO L480 AbstractCegarLoop]: Abstraction has 2852 states and 6953 transitions. [2021-03-10 22:59:53,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 6953 transitions. [2021-03-10 22:59:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:53,179 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:53,179 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:53,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:53,380 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:53,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2124544429, now seen corresponding path program 46 times [2021-03-10 22:59:53,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:53,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283803990] [2021-03-10 22:59:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:53,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283803990] [2021-03-10 22:59:53,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195611845] [2021-03-10 22:59:53,563 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:53,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:59:53,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 22:59:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:54,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:54,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-03-10 22:59:54,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433936084] [2021-03-10 22:59:54,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 22:59:54,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:54,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 22:59:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:59:54,126 INFO L87 Difference]: Start difference. First operand 2852 states and 6953 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:58,310 INFO L93 Difference]: Finished difference Result 7067 states and 15853 transitions. [2021-03-10 22:59:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-03-10 22:59:58,311 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:59:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:58,318 INFO L225 Difference]: With dead ends: 7067 [2021-03-10 22:59:58,318 INFO L226 Difference]: Without dead ends: 7019 [2021-03-10 22:59:58,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5501 ImplicationChecksByTransitivity, 3209.3ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-03-10 22:59:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7019 states. [2021-03-10 22:59:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7019 to 2694. [2021-03-10 22:59:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2693 states have (on average 2.4496843668770887) internal successors, (6597), 2693 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 6597 transitions. [2021-03-10 22:59:58,363 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 6597 transitions. Word has length 43 [2021-03-10 22:59:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:58,364 INFO L480 AbstractCegarLoop]: Abstraction has 2694 states and 6597 transitions. [2021-03-10 22:59:58,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 6597 transitions. [2021-03-10 22:59:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:59:58,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:58,366 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:58,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 22:59:58,567 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:58,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:58,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1202690767, now seen corresponding path program 47 times [2021-03-10 22:59:58,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:58,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943009531] [2021-03-10 22:59:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:58,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943009531] [2021-03-10 22:59:58,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955569265] [2021-03-10 22:59:58,780 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 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 22:59:58,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 22:59:58,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:58,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:59:58,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:59,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:59,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2021-03-10 22:59:59,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944226193] [2021-03-10 22:59:59,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 22:59:59,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:59,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 22:59:59,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:59:59,327 INFO L87 Difference]: Start difference. First operand 2694 states and 6597 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:02,902 INFO L93 Difference]: Finished difference Result 8504 states and 18894 transitions. [2021-03-10 23:00:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-03-10 23:00:02,902 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 23:00:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:02,911 INFO L225 Difference]: With dead ends: 8504 [2021-03-10 23:00:02,912 INFO L226 Difference]: Without dead ends: 8375 [2021-03-10 23:00:02,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5138 ImplicationChecksByTransitivity, 2886.6ms TimeCoverageRelationStatistics Valid=2380, Invalid=12140, Unknown=0, NotChecked=0, Total=14520 [2021-03-10 23:00:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8375 states. [2021-03-10 23:00:02,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8375 to 2690. [2021-03-10 23:00:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2689 states have (on average 2.4503532911863144) internal successors, (6589), 2689 states have internal predecessors, (6589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 6589 transitions. [2021-03-10 23:00:02,957 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 6589 transitions. Word has length 43 [2021-03-10 23:00:02,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:02,957 INFO L480 AbstractCegarLoop]: Abstraction has 2690 states and 6589 transitions. [2021-03-10 23:00:02,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 6589 transitions. [2021-03-10 23:00:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:00:02,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:02,960 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:03,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:03,160 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:03,160 INFO L82 PathProgramCache]: Analyzing trace with hash -693830219, now seen corresponding path program 48 times [2021-03-10 23:00:03,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:03,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135041844] [2021-03-10 23:00:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:03,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135041844] [2021-03-10 23:00:03,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545458329] [2021-03-10 23:00:03,386 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 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 23:00:03,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 23:00:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:00:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:04,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:04,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-03-10 23:00:04,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617468423] [2021-03-10 23:00:04,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:00:04,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:04,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:00:04,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:00:04,020 INFO L87 Difference]: Start difference. First operand 2690 states and 6589 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:07,505 INFO L93 Difference]: Finished difference Result 9110 states and 20113 transitions. [2021-03-10 23:00:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-03-10 23:00:07,506 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 23:00:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:07,516 INFO L225 Difference]: With dead ends: 9110 [2021-03-10 23:00:07,516 INFO L226 Difference]: Without dead ends: 8906 [2021-03-10 23:00:07,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 3030.3ms TimeCoverageRelationStatistics Valid=2778, Invalid=12474, Unknown=0, NotChecked=0, Total=15252 [2021-03-10 23:00:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8906 states. [2021-03-10 23:00:07,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8906 to 2710. [2021-03-10 23:00:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 2.44702842377261) internal successors, (6629), 2709 states have internal predecessors, (6629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 6629 transitions. [2021-03-10 23:00:07,572 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 6629 transitions. Word has length 43 [2021-03-10 23:00:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:07,572 INFO L480 AbstractCegarLoop]: Abstraction has 2710 states and 6629 transitions. [2021-03-10 23:00:07,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:07,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 6629 transitions. [2021-03-10 23:00:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:00:07,575 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:07,575 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:07,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 23:00:07,785 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:07,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1424391367, now seen corresponding path program 49 times [2021-03-10 23:00:07,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:07,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029011723] [2021-03-10 23:00:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:08,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029011723] [2021-03-10 23:00:08,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541182590] [2021-03-10 23:00:08,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 23:00:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:08,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:08,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-03-10 23:00:08,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490298950] [2021-03-10 23:00:08,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:00:08,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:08,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:00:08,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:00:08,667 INFO L87 Difference]: Start difference. First operand 2710 states and 6629 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:11,790 INFO L93 Difference]: Finished difference Result 9783 states and 22057 transitions. [2021-03-10 23:00:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-03-10 23:00:11,791 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 23:00:11,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:11,801 INFO L225 Difference]: With dead ends: 9783 [2021-03-10 23:00:11,801 INFO L226 Difference]: Without dead ends: 9369 [2021-03-10 23:00:11,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 2844.7ms TimeCoverageRelationStatistics Valid=2685, Invalid=11121, Unknown=0, NotChecked=0, Total=13806 [2021-03-10 23:00:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2021-03-10 23:00:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 2859. [2021-03-10 23:00:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.368439468159552) internal successors, (6769), 2858 states have internal predecessors, (6769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 6769 transitions. [2021-03-10 23:00:11,865 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 6769 transitions. Word has length 43 [2021-03-10 23:00:11,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:11,866 INFO L480 AbstractCegarLoop]: Abstraction has 2859 states and 6769 transitions. [2021-03-10 23:00:11,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 6769 transitions. [2021-03-10 23:00:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:00:11,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:11,869 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:12,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:12,069 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:12,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:12,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2075066565, now seen corresponding path program 50 times [2021-03-10 23:00:12,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:12,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584078909] [2021-03-10 23:00:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:12,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584078909] [2021-03-10 23:00:12,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446160029] [2021-03-10 23:00:12,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:12,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:00:12,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:12,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:00:12,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:12,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:12,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-03-10 23:00:12,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285735610] [2021-03-10 23:00:12,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:00:12,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:12,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:00:12,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:00:12,794 INFO L87 Difference]: Start difference. First operand 2859 states and 6769 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:17,470 INFO L93 Difference]: Finished difference Result 6829 states and 15444 transitions. [2021-03-10 23:00:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-03-10 23:00:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 23:00:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:17,478 INFO L225 Difference]: With dead ends: 6829 [2021-03-10 23:00:17,478 INFO L226 Difference]: Without dead ends: 6825 [2021-03-10 23:00:17,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 4283.2ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-03-10 23:00:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6825 states. [2021-03-10 23:00:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6825 to 2962. [2021-03-10 23:00:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 2.403579871664978) internal successors, (7117), 2961 states have internal predecessors, (7117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 7117 transitions. [2021-03-10 23:00:17,528 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 7117 transitions. Word has length 43 [2021-03-10 23:00:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:17,528 INFO L480 AbstractCegarLoop]: Abstraction has 2962 states and 7117 transitions. [2021-03-10 23:00:17,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 7117 transitions. [2021-03-10 23:00:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 23:00:17,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:17,531 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:17,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:17,736 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:17,736 INFO L82 PathProgramCache]: Analyzing trace with hash 498869585, now seen corresponding path program 51 times [2021-03-10 23:00:17,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:17,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426724311] [2021-03-10 23:00:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:17,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426724311] [2021-03-10 23:00:17,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629780192] [2021-03-10 23:00:17,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:18,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 23:00:18,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:18,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:00:18,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:18,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:18,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-03-10 23:00:18,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885847163] [2021-03-10 23:00:18,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-03-10 23:00:18,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-03-10 23:00:18,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:00:18,682 INFO L87 Difference]: Start difference. First operand 2962 states and 7117 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:22,393 INFO L93 Difference]: Finished difference Result 4709 states and 10625 transitions. [2021-03-10 23:00:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-03-10 23:00:22,394 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 23:00:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:22,398 INFO L225 Difference]: With dead ends: 4709 [2021-03-10 23:00:22,398 INFO L226 Difference]: Without dead ends: 4427 [2021-03-10 23:00:22,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6158 ImplicationChecksByTransitivity, 3411.3ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-03-10 23:00:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2021-03-10 23:00:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 2849. [2021-03-10 23:00:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.392205056179775) internal successors, (6813), 2848 states have internal predecessors, (6813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 6813 transitions. [2021-03-10 23:00:22,431 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 6813 transitions. Word has length 45 [2021-03-10 23:00:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:22,431 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 6813 transitions. [2021-03-10 23:00:22,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:22,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 6813 transitions. [2021-03-10 23:00:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 23:00:22,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:22,434 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:22,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:22,647 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:22,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1866547877, now seen corresponding path program 52 times [2021-03-10 23:00:22,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:22,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502931774] [2021-03-10 23:00:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:22,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502931774] [2021-03-10 23:00:22,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009034298] [2021-03-10 23:00:22,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:22,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:00:22,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:00:22,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:23,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:23,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 30 [2021-03-10 23:00:23,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368827468] [2021-03-10 23:00:23,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:00:23,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:23,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:00:23,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:00:23,372 INFO L87 Difference]: Start difference. First operand 2849 states and 6813 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:26,978 INFO L93 Difference]: Finished difference Result 3679 states and 8433 transitions. [2021-03-10 23:00:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-03-10 23:00:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 23:00:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:26,983 INFO L225 Difference]: With dead ends: 3679 [2021-03-10 23:00:26,983 INFO L226 Difference]: Without dead ends: 3675 [2021-03-10 23:00:26,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 3423.9ms TimeCoverageRelationStatistics Valid=3813, Invalid=12443, Unknown=0, NotChecked=0, Total=16256 [2021-03-10 23:00:26,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2021-03-10 23:00:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2849. [2021-03-10 23:00:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.3918539325842696) internal successors, (6812), 2848 states have internal predecessors, (6812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 6812 transitions. [2021-03-10 23:00:27,014 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 6812 transitions. Word has length 45 [2021-03-10 23:00:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:27,014 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 6812 transitions. [2021-03-10 23:00:27,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 6812 transitions. [2021-03-10 23:00:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:00:27,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:27,017 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:27,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:27,219 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:27,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 53 times [2021-03-10 23:00:27,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:27,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987894507] [2021-03-10 23:00:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:27,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987894507] [2021-03-10 23:00:27,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312727481] [2021-03-10 23:00:27,409 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 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 23:00:27,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 23:00:27,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:27,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:00:27,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:27,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:27,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 23:00:27,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864110887] [2021-03-10 23:00:27,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:00:27,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:27,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:00:27,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:00:27,544 INFO L87 Difference]: Start difference. First operand 2849 states and 6812 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:27,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:27,710 INFO L93 Difference]: Finished difference Result 3813 states and 9018 transitions. [2021-03-10 23:00:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:00:27,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:00:27,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:27,714 INFO L225 Difference]: With dead ends: 3813 [2021-03-10 23:00:27,715 INFO L226 Difference]: Without dead ends: 3750 [2021-03-10 23:00:27,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:00:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2021-03-10 23:00:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3429. [2021-03-10 23:00:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 2.430571761960327) internal successors, (8332), 3428 states have internal predecessors, (8332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 8332 transitions. [2021-03-10 23:00:27,752 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 8332 transitions. Word has length 47 [2021-03-10 23:00:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:27,753 INFO L480 AbstractCegarLoop]: Abstraction has 3429 states and 8332 transitions. [2021-03-10 23:00:27,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 8332 transitions. [2021-03-10 23:00:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:00:27,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:27,757 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:27,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-03-10 23:00:27,959 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:27,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1886194913, now seen corresponding path program 54 times [2021-03-10 23:00:27,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:27,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012051753] [2021-03-10 23:00:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:28,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012051753] [2021-03-10 23:00:28,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766442741] [2021-03-10 23:00:28,381 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 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 23:00:28,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 23:00:28,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:28,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 23:00:28,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:28,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:28,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 34 [2021-03-10 23:00:28,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914967482] [2021-03-10 23:00:28,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:00:28,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:28,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:00:28,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:00:28,841 INFO L87 Difference]: Start difference. First operand 3429 states and 8332 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:30,405 INFO L93 Difference]: Finished difference Result 4327 states and 10075 transitions. [2021-03-10 23:00:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:00:30,405 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:00:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:30,410 INFO L225 Difference]: With dead ends: 4327 [2021-03-10 23:00:30,411 INFO L226 Difference]: Without dead ends: 4324 [2021-03-10 23:00:30,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1473.9ms TimeCoverageRelationStatistics Valid=403, Invalid=3137, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:00:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-03-10 23:00:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3396. [2021-03-10 23:00:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 2.422680412371134) internal successors, (8225), 3395 states have internal predecessors, (8225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 8225 transitions. [2021-03-10 23:00:30,452 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 8225 transitions. Word has length 47 [2021-03-10 23:00:30,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:30,452 INFO L480 AbstractCegarLoop]: Abstraction has 3396 states and 8225 transitions. [2021-03-10 23:00:30,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 8225 transitions. [2021-03-10 23:00:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:00:30,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:30,456 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:30,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 23:00:30,657 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:30,657 INFO L82 PathProgramCache]: Analyzing trace with hash -16912795, now seen corresponding path program 55 times [2021-03-10 23:00:30,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:30,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309399619] [2021-03-10 23:00:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:30,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309399619] [2021-03-10 23:00:30,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845195429] [2021-03-10 23:00:30,933 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:00:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:31,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:31,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-03-10 23:00:31,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89348395] [2021-03-10 23:00:31,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:00:31,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:31,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:00:31,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:00:31,773 INFO L87 Difference]: Start difference. First operand 3396 states and 8225 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:37,842 INFO L93 Difference]: Finished difference Result 7270 states and 16363 transitions. [2021-03-10 23:00:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-03-10 23:00:37,843 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:00:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:37,852 INFO L225 Difference]: With dead ends: 7270 [2021-03-10 23:00:37,852 INFO L226 Difference]: Without dead ends: 7246 [2021-03-10 23:00:37,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5227 ImplicationChecksByTransitivity, 4015.3ms TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2021-03-10 23:00:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7246 states. [2021-03-10 23:00:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7246 to 3694. [2021-03-10 23:00:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3694 states, 3693 states have (on average 2.428919577579204) internal successors, (8970), 3693 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3694 states to 3694 states and 8970 transitions. [2021-03-10 23:00:37,921 INFO L78 Accepts]: Start accepts. Automaton has 3694 states and 8970 transitions. Word has length 47 [2021-03-10 23:00:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:37,921 INFO L480 AbstractCegarLoop]: Abstraction has 3694 states and 8970 transitions. [2021-03-10 23:00:37,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3694 states and 8970 transitions. [2021-03-10 23:00:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:00:37,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:37,925 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:38,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 23:00:38,126 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:38,126 INFO L82 PathProgramCache]: Analyzing trace with hash -747278705, now seen corresponding path program 56 times [2021-03-10 23:00:38,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:38,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278645358] [2021-03-10 23:00:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:38,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278645358] [2021-03-10 23:00:38,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739792752] [2021-03-10 23:00:38,349 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 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 23:00:38,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:00:38,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:00:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:39,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:39,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-03-10 23:00:39,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681260760] [2021-03-10 23:00:39,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:00:39,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:39,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:00:39,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:00:39,159 INFO L87 Difference]: Start difference. First operand 3694 states and 8970 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:44,485 INFO L93 Difference]: Finished difference Result 5745 states and 13237 transitions. [2021-03-10 23:00:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 23:00:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:00:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:44,492 INFO L225 Difference]: With dead ends: 5745 [2021-03-10 23:00:44,492 INFO L226 Difference]: Without dead ends: 5741 [2021-03-10 23:00:44,493 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 3504.0ms TimeCoverageRelationStatistics Valid=1247, Invalid=10525, Unknown=0, NotChecked=0, Total=11772 [2021-03-10 23:00:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5741 states. [2021-03-10 23:00:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5741 to 3440. [2021-03-10 23:00:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 2.4286129688863043) internal successors, (8352), 3439 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 8352 transitions. [2021-03-10 23:00:44,538 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 8352 transitions. Word has length 47 [2021-03-10 23:00:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:44,538 INFO L480 AbstractCegarLoop]: Abstraction has 3440 states and 8352 transitions. [2021-03-10 23:00:44,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 8352 transitions. [2021-03-10 23:00:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:00:44,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:44,542 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:44,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:44,742 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:44,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:44,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1296923881, now seen corresponding path program 57 times [2021-03-10 23:00:44,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:44,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556229667] [2021-03-10 23:00:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:45,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556229667] [2021-03-10 23:00:45,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23699947] [2021-03-10 23:00:45,010 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 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 23:00:45,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-03-10 23:00:45,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:45,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:00:45,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:45,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:45,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-03-10 23:00:45,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942352960] [2021-03-10 23:00:45,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:00:45,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:00:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:00:45,802 INFO L87 Difference]: Start difference. First operand 3440 states and 8352 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:53,523 INFO L93 Difference]: Finished difference Result 8740 states and 19553 transitions. [2021-03-10 23:00:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-03-10 23:00:53,524 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:00:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:53,534 INFO L225 Difference]: With dead ends: 8740 [2021-03-10 23:00:53,534 INFO L226 Difference]: Without dead ends: 8692 [2021-03-10 23:00:53,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7835 ImplicationChecksByTransitivity, 4856.7ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-03-10 23:00:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8692 states. [2021-03-10 23:00:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8692 to 3420. [2021-03-10 23:00:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 2.428780345130155) internal successors, (8304), 3419 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 8304 transitions. [2021-03-10 23:00:53,593 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 8304 transitions. Word has length 47 [2021-03-10 23:00:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:53,593 INFO L480 AbstractCegarLoop]: Abstraction has 3420 states and 8304 transitions. [2021-03-10 23:00:53,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 8304 transitions. [2021-03-10 23:00:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:00:53,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:53,597 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:53,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:53,811 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:53,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1447724947, now seen corresponding path program 58 times [2021-03-10 23:00:53,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:53,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896749058] [2021-03-10 23:00:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:54,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896749058] [2021-03-10 23:00:54,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614785036] [2021-03-10 23:00:54,095 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 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 23:00:54,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:00:54,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:54,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:00:54,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:54,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:54,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-03-10 23:00:54,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970236800] [2021-03-10 23:00:54,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:00:54,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:00:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:00:54,931 INFO L87 Difference]: Start difference. First operand 3420 states and 8304 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:02,797 INFO L93 Difference]: Finished difference Result 10637 states and 23630 transitions. [2021-03-10 23:01:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-03-10 23:01:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:01:02,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:02,810 INFO L225 Difference]: With dead ends: 10637 [2021-03-10 23:01:02,811 INFO L226 Difference]: Without dead ends: 10559 [2021-03-10 23:01:02,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 5279.2ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-03-10 23:01:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-03-10 23:01:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 3388. [2021-03-10 23:01:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.4328314142308827) internal successors, (8240), 3387 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 8240 transitions. [2021-03-10 23:01:02,879 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 8240 transitions. Word has length 47 [2021-03-10 23:01:02,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:02,879 INFO L480 AbstractCegarLoop]: Abstraction has 3388 states and 8240 transitions. [2021-03-10 23:01:02,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 8240 transitions. [2021-03-10 23:01:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:01:02,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:02,883 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:03,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 23:01:03,087 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash 580886769, now seen corresponding path program 59 times [2021-03-10 23:01:03,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:03,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649130094] [2021-03-10 23:01:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:03,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649130094] [2021-03-10 23:01:03,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544957923] [2021-03-10 23:01:03,385 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 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 23:01:03,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 23:01:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:01:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:04,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:04,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 40 [2021-03-10 23:01:04,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124897533] [2021-03-10 23:01:04,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-03-10 23:01:04,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:04,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-03-10 23:01:04,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:01:04,136 INFO L87 Difference]: Start difference. First operand 3388 states and 8240 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:09,469 INFO L93 Difference]: Finished difference Result 12029 states and 26608 transitions. [2021-03-10 23:01:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-03-10 23:01:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:01:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:09,486 INFO L225 Difference]: With dead ends: 12029 [2021-03-10 23:01:09,486 INFO L226 Difference]: Without dead ends: 11861 [2021-03-10 23:01:09,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6478 ImplicationChecksByTransitivity, 4194.3ms TimeCoverageRelationStatistics Valid=2941, Invalid=14881, Unknown=0, NotChecked=0, Total=17822 [2021-03-10 23:01:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11861 states. [2021-03-10 23:01:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11861 to 3416. [2021-03-10 23:01:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 2.4292825768667643) internal successors, (8296), 3415 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 8296 transitions. [2021-03-10 23:01:09,564 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 8296 transitions. Word has length 47 [2021-03-10 23:01:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:09,564 INFO L480 AbstractCegarLoop]: Abstraction has 3416 states and 8296 transitions. [2021-03-10 23:01:09,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 8296 transitions. [2021-03-10 23:01:09,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:01:09,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:09,567 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:09,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:01:09,767 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:09,768 INFO L82 PathProgramCache]: Analyzing trace with hash 42317429, now seen corresponding path program 60 times [2021-03-10 23:01:09,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:09,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481181236] [2021-03-10 23:01:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:10,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481181236] [2021-03-10 23:01:10,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917741856] [2021-03-10 23:01:10,103 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 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 23:01:10,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 23:01:10,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:10,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:01:10,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:10,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:10,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-03-10 23:01:10,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229198871] [2021-03-10 23:01:10,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-03-10 23:01:10,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:10,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-03-10 23:01:10,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:01:10,919 INFO L87 Difference]: Start difference. First operand 3416 states and 8296 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:16,981 INFO L93 Difference]: Finished difference Result 12153 states and 26725 transitions. [2021-03-10 23:01:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-03-10 23:01:16,983 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:01:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:16,997 INFO L225 Difference]: With dead ends: 12153 [2021-03-10 23:01:16,997 INFO L226 Difference]: Without dead ends: 11850 [2021-03-10 23:01:16,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8350 ImplicationChecksByTransitivity, 4992.6ms TimeCoverageRelationStatistics Valid=4138, Invalid=18212, Unknown=0, NotChecked=0, Total=22350 [2021-03-10 23:01:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11850 states. [2021-03-10 23:01:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11850 to 3436. [2021-03-10 23:01:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 2.426783114992722) internal successors, (8336), 3435 states have internal predecessors, (8336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 8336 transitions. [2021-03-10 23:01:17,086 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 8336 transitions. Word has length 47 [2021-03-10 23:01:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:17,086 INFO L480 AbstractCegarLoop]: Abstraction has 3436 states and 8336 transitions. [2021-03-10 23:01:17,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 8336 transitions. [2021-03-10 23:01:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:01:17,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:17,089 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:17,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:01:17,291 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:17,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:17,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1274116345, now seen corresponding path program 61 times [2021-03-10 23:01:17,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:17,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155963538] [2021-03-10 23:01:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:17,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155963538] [2021-03-10 23:01:17,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023423419] [2021-03-10 23:01:17,581 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 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 23:01:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:01:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:18,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:18,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-03-10 23:01:18,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382142926] [2021-03-10 23:01:18,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-03-10 23:01:18,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:18,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-03-10 23:01:18,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:01:18,466 INFO L87 Difference]: Start difference. First operand 3436 states and 8336 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:24,177 INFO L93 Difference]: Finished difference Result 12452 states and 28026 transitions. [2021-03-10 23:01:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-03-10 23:01:24,179 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:01:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:24,194 INFO L225 Difference]: With dead ends: 12452 [2021-03-10 23:01:24,194 INFO L226 Difference]: Without dead ends: 11933 [2021-03-10 23:01:24,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6615 ImplicationChecksByTransitivity, 4923.6ms TimeCoverageRelationStatistics Valid=3920, Invalid=15820, Unknown=0, NotChecked=0, Total=19740 [2021-03-10 23:01:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11933 states. [2021-03-10 23:01:24,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11933 to 2957. [2021-03-10 23:01:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2956 states have (on average 2.3687415426251692) internal successors, (7002), 2956 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:24,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 7002 transitions. [2021-03-10 23:01:24,274 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 7002 transitions. Word has length 47 [2021-03-10 23:01:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:24,274 INFO L480 AbstractCegarLoop]: Abstraction has 2957 states and 7002 transitions. [2021-03-10 23:01:24,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:24,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 7002 transitions. [2021-03-10 23:01:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:01:24,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:24,277 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:24,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:01:24,478 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash 437294911, now seen corresponding path program 62 times [2021-03-10 23:01:24,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:24,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004173206] [2021-03-10 23:01:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:24,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004173206] [2021-03-10 23:01:24,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631580814] [2021-03-10 23:01:24,680 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 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 23:01:24,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:01:24,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:24,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:01:24,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:25,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:25,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 34 [2021-03-10 23:01:25,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821187961] [2021-03-10 23:01:25,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:01:25,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:25,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:01:25,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:01:25,541 INFO L87 Difference]: Start difference. First operand 2957 states and 7002 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:34,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:34,308 INFO L93 Difference]: Finished difference Result 6600 states and 14572 transitions. [2021-03-10 23:01:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-03-10 23:01:34,309 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:01:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:34,316 INFO L225 Difference]: With dead ends: 6600 [2021-03-10 23:01:34,316 INFO L226 Difference]: Without dead ends: 6596 [2021-03-10 23:01:34,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14541 ImplicationChecksByTransitivity, 7981.4ms TimeCoverageRelationStatistics Valid=7575, Invalid=27581, Unknown=0, NotChecked=0, Total=35156 [2021-03-10 23:01:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6596 states. [2021-03-10 23:01:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6596 to 3022. [2021-03-10 23:01:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 3021 states have (on average 2.386957960940086) internal successors, (7211), 3021 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 7211 transitions. [2021-03-10 23:01:34,362 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 7211 transitions. Word has length 47 [2021-03-10 23:01:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:34,362 INFO L480 AbstractCegarLoop]: Abstraction has 3022 states and 7211 transitions. [2021-03-10 23:01:34,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 7211 transitions. [2021-03-10 23:01:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 23:01:34,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:34,365 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:34,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:01:34,566 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:34,566 INFO L82 PathProgramCache]: Analyzing trace with hash 813264653, now seen corresponding path program 63 times [2021-03-10 23:01:34,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:34,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569106711] [2021-03-10 23:01:34,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:34,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569106711] [2021-03-10 23:01:34,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927003445] [2021-03-10 23:01:34,932 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 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 23:01:34,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 23:01:34,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:34,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 23:01:34,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:35,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:35,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-03-10 23:01:35,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311437137] [2021-03-10 23:01:35,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-03-10 23:01:35,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-03-10 23:01:35,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:01:35,959 INFO L87 Difference]: Start difference. First operand 3022 states and 7211 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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 23:01:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:42,525 INFO L93 Difference]: Finished difference Result 4634 states and 10318 transitions. [2021-03-10 23:01:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-03-10 23:01:42,526 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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 49 [2021-03-10 23:01:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:42,531 INFO L225 Difference]: With dead ends: 4634 [2021-03-10 23:01:42,531 INFO L226 Difference]: Without dead ends: 4382 [2021-03-10 23:01:42,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9327 ImplicationChecksByTransitivity, 6117.2ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-03-10 23:01:42,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-03-10 23:01:42,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 3023. [2021-03-10 23:01:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3023 states, 3022 states have (on average 2.382528127068167) internal successors, (7200), 3022 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3023 states to 3023 states and 7200 transitions. [2021-03-10 23:01:42,568 INFO L78 Accepts]: Start accepts. Automaton has 3023 states and 7200 transitions. Word has length 49 [2021-03-10 23:01:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:42,568 INFO L480 AbstractCegarLoop]: Abstraction has 3023 states and 7200 transitions. [2021-03-10 23:01:42,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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 23:01:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3023 states and 7200 transitions. [2021-03-10 23:01:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 23:01:42,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:42,571 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:42,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:01:42,771 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:42,772 INFO L82 PathProgramCache]: Analyzing trace with hash 769472859, now seen corresponding path program 64 times [2021-03-10 23:01:42,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:42,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283948259] [2021-03-10 23:01:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:42,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283948259] [2021-03-10 23:01:42,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967512161] [2021-03-10 23:01:42,979 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 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 23:01:43,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:01:43,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:43,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:01:43,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:43,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:43,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22] total 33 [2021-03-10 23:01:43,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6806041] [2021-03-10 23:01:43,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:01:43,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:01:43,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:01:43,967 INFO L87 Difference]: Start difference. First operand 3023 states and 7200 transitions. Second operand has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:50,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:50,446 INFO L93 Difference]: Finished difference Result 4059 states and 9228 transitions. [2021-03-10 23:01:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-03-10 23:01:50,448 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 23:01:50,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:50,453 INFO L225 Difference]: With dead ends: 4059 [2021-03-10 23:01:50,453 INFO L226 Difference]: Without dead ends: 4055 [2021-03-10 23:01:50,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 6209.0ms TimeCoverageRelationStatistics Valid=5366, Invalid=17586, Unknown=0, NotChecked=0, Total=22952 [2021-03-10 23:01:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-03-10 23:01:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 3023. [2021-03-10 23:01:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3023 states, 3022 states have (on average 2.3821972203838517) internal successors, (7199), 3022 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3023 states to 3023 states and 7199 transitions. [2021-03-10 23:01:50,489 INFO L78 Accepts]: Start accepts. Automaton has 3023 states and 7199 transitions. Word has length 49 [2021-03-10 23:01:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:50,490 INFO L480 AbstractCegarLoop]: Abstraction has 3023 states and 7199 transitions. [2021-03-10 23:01:50,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3023 states and 7199 transitions. [2021-03-10 23:01:50,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:01:50,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:50,492 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:50,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-03-10 23:01:50,693 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 65 times [2021-03-10 23:01:50,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:50,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989089219] [2021-03-10 23:01:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:50,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989089219] [2021-03-10 23:01:50,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446058250] [2021-03-10 23:01:50,918 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 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 23:01:50,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 23:01:50,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:50,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:01:50,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:51,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:51,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 23:01:51,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513000844] [2021-03-10 23:01:51,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:01:51,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:51,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:01:51,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:01:51,138 INFO L87 Difference]: Start difference. First operand 3023 states and 7199 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:51,469 INFO L93 Difference]: Finished difference Result 4018 states and 9410 transitions. [2021-03-10 23:01:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:01:51,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 23:01:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:51,475 INFO L225 Difference]: With dead ends: 4018 [2021-03-10 23:01:51,475 INFO L226 Difference]: Without dead ends: 3949 [2021-03-10 23:01:51,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:01:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2021-03-10 23:01:51,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 3564. [2021-03-10 23:01:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 2.4139769856862197) internal successors, (8601), 3563 states have internal predecessors, (8601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 8601 transitions. [2021-03-10 23:01:51,519 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 8601 transitions. Word has length 51 [2021-03-10 23:01:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:51,519 INFO L480 AbstractCegarLoop]: Abstraction has 3564 states and 8601 transitions. [2021-03-10 23:01:51,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 8601 transitions. [2021-03-10 23:01:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:01:51,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:51,522 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:51,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-03-10 23:01:51,729 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash 163570205, now seen corresponding path program 66 times [2021-03-10 23:01:51,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:51,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377642551] [2021-03-10 23:01:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:52,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377642551] [2021-03-10 23:01:52,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429539102] [2021-03-10 23:01:52,395 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 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 23:01:52,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 23:01:52,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:52,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:01:52,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:53,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:53,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 37 [2021-03-10 23:01:53,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497753034] [2021-03-10 23:01:53,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:01:53,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:53,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:01:53,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:01:53,128 INFO L87 Difference]: Start difference. First operand 3564 states and 8601 transitions. Second operand has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:56,432 INFO L93 Difference]: Finished difference Result 4574 states and 10570 transitions. [2021-03-10 23:01:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:01:56,434 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 23:01:56,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:56,440 INFO L225 Difference]: With dead ends: 4574 [2021-03-10 23:01:56,440 INFO L226 Difference]: Without dead ends: 4571 [2021-03-10 23:01:56,440 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2373.7ms TimeCoverageRelationStatistics Valid=447, Invalid=3843, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:01:56,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2021-03-10 23:01:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 3534. [2021-03-10 23:01:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3533 states have (on average 2.4152278516841212) internal successors, (8533), 3533 states have internal predecessors, (8533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 8533 transitions. [2021-03-10 23:01:56,490 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 8533 transitions. Word has length 51 [2021-03-10 23:01:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:56,490 INFO L480 AbstractCegarLoop]: Abstraction has 3534 states and 8533 transitions. [2021-03-10 23:01:56,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 8533 transitions. [2021-03-10 23:01:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:01:56,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:56,493 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:56,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-03-10 23:01:56,703 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:56,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1009669025, now seen corresponding path program 67 times [2021-03-10 23:01:56,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:56,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736699904] [2021-03-10 23:01:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:57,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736699904] [2021-03-10 23:01:57,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464788339] [2021-03-10 23:01:57,087 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 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 23:01:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:57,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-03-10 23:01:57,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:58,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:58,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-03-10 23:01:58,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729344482] [2021-03-10 23:01:58,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-03-10 23:01:58,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:58,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-03-10 23:01:58,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:01:58,210 INFO L87 Difference]: Start difference. First operand 3534 states and 8533 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:02:09,365 INFO L93 Difference]: Finished difference Result 7445 states and 16594 transitions. [2021-03-10 23:02:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-03-10 23:02:09,367 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 23:02:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:02:09,376 INFO L225 Difference]: With dead ends: 7445 [2021-03-10 23:02:09,377 INFO L226 Difference]: Without dead ends: 7421 [2021-03-10 23:02:09,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 6770.5ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-03-10 23:02:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2021-03-10 23:02:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 3801. [2021-03-10 23:02:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 2.4194736842105264) internal successors, (9194), 3800 states have internal predecessors, (9194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 9194 transitions. [2021-03-10 23:02:09,443 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 9194 transitions. Word has length 51 [2021-03-10 23:02:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:02:09,443 INFO L480 AbstractCegarLoop]: Abstraction has 3801 states and 9194 transitions. [2021-03-10 23:02:09,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 9194 transitions. [2021-03-10 23:02:09,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:02:09,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:02:09,447 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:02:09,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:02:09,648 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:02:09,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:02:09,648 INFO L82 PathProgramCache]: Analyzing trace with hash 279303115, now seen corresponding path program 68 times [2021-03-10 23:02:09,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:02:09,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070597995] [2021-03-10 23:02:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:02:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:02:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:10,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070597995] [2021-03-10 23:02:10,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86492107] [2021-03-10 23:02:10,040 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 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 23:02:10,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:02:10,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:02:10,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-03-10 23:02:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:02:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:11,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:02:11,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 38 [2021-03-10 23:02:11,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247460289] [2021-03-10 23:02:11,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:02:11,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:02:11,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:02:11,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:02:11,561 INFO L87 Difference]: Start difference. First operand 3801 states and 9194 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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 23:02:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:02:21,468 INFO L93 Difference]: Finished difference Result 5719 states and 13052 transitions. [2021-03-10 23:02:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-03-10 23:02:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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 51 [2021-03-10 23:02:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:02:21,477 INFO L225 Difference]: With dead ends: 5719 [2021-03-10 23:02:21,478 INFO L226 Difference]: Without dead ends: 5715 [2021-03-10 23:02:21,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 6293.0ms TimeCoverageRelationStatistics Valid=1409, Invalid=13111, Unknown=0, NotChecked=0, Total=14520 [2021-03-10 23:02:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5715 states. [2021-03-10 23:02:21,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5715 to 3599. [2021-03-10 23:02:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3599 states, 3598 states have (on average 2.4171762090050026) internal successors, (8697), 3598 states have internal predecessors, (8697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 8697 transitions. [2021-03-10 23:02:21,528 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 8697 transitions. Word has length 51 [2021-03-10 23:02:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:02:21,528 INFO L480 AbstractCegarLoop]: Abstraction has 3599 states and 8697 transitions. [2021-03-10 23:02:21,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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 23:02:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 8697 transitions. [2021-03-10 23:02:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:02:21,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:02:21,532 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:02:21,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-03-10 23:02:21,749 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:02:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:02:21,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1388875227, now seen corresponding path program 69 times [2021-03-10 23:02:21,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:02:21,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011217946] [2021-03-10 23:02:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:02:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:02:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:22,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011217946] [2021-03-10 23:02:22,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189444004] [2021-03-10 23:02:22,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:02:22,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 23:02:22,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:02:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:02:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:02:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:23,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:02:23,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-03-10 23:02:23,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366003267] [2021-03-10 23:02:23,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-03-10 23:02:23,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:02:23,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-03-10 23:02:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:02:23,418 INFO L87 Difference]: Start difference. First operand 3599 states and 8697 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:02:39,128 INFO L93 Difference]: Finished difference Result 9190 states and 20382 transitions. [2021-03-10 23:02:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-03-10 23:02:39,130 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 23:02:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:02:39,142 INFO L225 Difference]: With dead ends: 9190 [2021-03-10 23:02:39,142 INFO L226 Difference]: Without dead ends: 9142 [2021-03-10 23:02:39,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10597 ImplicationChecksByTransitivity, 9083.1ms TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-03-10 23:02:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9142 states. [2021-03-10 23:02:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9142 to 3554. [2021-03-10 23:02:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3553 states have (on average 2.414579228820715) internal successors, (8579), 3553 states have internal predecessors, (8579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 8579 transitions. [2021-03-10 23:02:39,212 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 8579 transitions. Word has length 51 [2021-03-10 23:02:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:02:39,212 INFO L480 AbstractCegarLoop]: Abstraction has 3554 states and 8579 transitions. [2021-03-10 23:02:39,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 8579 transitions. [2021-03-10 23:02:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:02:39,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:02:39,216 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:02:39,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-03-10 23:02:39,419 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:02:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:02:39,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1681194409, now seen corresponding path program 70 times [2021-03-10 23:02:39,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:02:39,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352276929] [2021-03-10 23:02:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:02:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:02:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:39,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352276929] [2021-03-10 23:02:39,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144417530] [2021-03-10 23:02:39,930 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 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 23:02:39,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:02:39,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:02:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:02:39,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:02:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:41,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:02:41,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-03-10 23:02:41,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286727814] [2021-03-10 23:02:41,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-03-10 23:02:41,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:02:41,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-03-10 23:02:41,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:02:41,475 INFO L87 Difference]: Start difference. First operand 3554 states and 8579 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:57,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:02:57,367 INFO L93 Difference]: Finished difference Result 10995 states and 24217 transitions. [2021-03-10 23:02:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-03-10 23:02:57,369 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 23:02:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:02:57,384 INFO L225 Difference]: With dead ends: 10995 [2021-03-10 23:02:57,384 INFO L226 Difference]: Without dead ends: 10917 [2021-03-10 23:02:57,385 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11924 ImplicationChecksByTransitivity, 11210.6ms TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-03-10 23:02:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2021-03-10 23:02:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 3498. [2021-03-10 23:02:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3497 states have (on average 2.4177866742922505) internal successors, (8455), 3497 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 8455 transitions. [2021-03-10 23:02:57,464 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 8455 transitions. Word has length 51 [2021-03-10 23:02:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:02:57,464 INFO L480 AbstractCegarLoop]: Abstraction has 3498 states and 8455 transitions. [2021-03-10 23:02:57,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 8455 transitions. [2021-03-10 23:02:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:02:57,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:02:57,467 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:02:57,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-03-10 23:02:57,668 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:02:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:02:57,668 INFO L82 PathProgramCache]: Analyzing trace with hash -393169363, now seen corresponding path program 71 times [2021-03-10 23:02:57,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:02:57,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438777623] [2021-03-10 23:02:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:02:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:02:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:58,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438777623] [2021-03-10 23:02:58,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955098244] [2021-03-10 23:02:58,193 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 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 23:02:58,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-03-10 23:02:58,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:02:58,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:02:58,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:02:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:59,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:02:59,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 43 [2021-03-10 23:02:59,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401360167] [2021-03-10 23:02:59,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-03-10 23:02:59,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:02:59,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-03-10 23:02:59,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:02:59,771 INFO L87 Difference]: Start difference. First operand 3498 states and 8455 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:13,140 INFO L93 Difference]: Finished difference Result 12850 states and 28081 transitions. [2021-03-10 23:03:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-03-10 23:03:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 23:03:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:13,162 INFO L225 Difference]: With dead ends: 12850 [2021-03-10 23:03:13,162 INFO L226 Difference]: Without dead ends: 12643 [2021-03-10 23:03:13,163 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9889 ImplicationChecksByTransitivity, 9511.4ms TimeCoverageRelationStatistics Valid=4035, Invalid=22697, Unknown=0, NotChecked=0, Total=26732 [2021-03-10 23:03:13,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2021-03-10 23:03:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 3486. [2021-03-10 23:03:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.4192252510760404) internal successors, (8431), 3485 states have internal predecessors, (8431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8431 transitions. [2021-03-10 23:03:13,256 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8431 transitions. Word has length 51 [2021-03-10 23:03:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:13,256 INFO L480 AbstractCegarLoop]: Abstraction has 3486 states and 8431 transitions. [2021-03-10 23:03:13,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8431 transitions. [2021-03-10 23:03:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:03:13,259 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:13,259 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:13,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-03-10 23:03:13,467 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:13,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1111204943, now seen corresponding path program 72 times [2021-03-10 23:03:13,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:13,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570531160] [2021-03-10 23:03:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:14,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570531160] [2021-03-10 23:03:14,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203775305] [2021-03-10 23:03:14,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:14,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 23:03:14,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:14,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:03:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:15,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:15,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-03-10 23:03:15,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038282615] [2021-03-10 23:03:15,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-03-10 23:03:15,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:15,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-03-10 23:03:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 23:03:15,637 INFO L87 Difference]: Start difference. First operand 3486 states and 8431 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:28,211 INFO L93 Difference]: Finished difference Result 14077 states and 30678 transitions. [2021-03-10 23:03:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-03-10 23:03:28,214 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 23:03:28,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:28,234 INFO L225 Difference]: With dead ends: 14077 [2021-03-10 23:03:28,235 INFO L226 Difference]: Without dead ends: 13789 [2021-03-10 23:03:28,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9832 ImplicationChecksByTransitivity, 9416.4ms TimeCoverageRelationStatistics Valid=4381, Invalid=21701, Unknown=0, NotChecked=0, Total=26082 [2021-03-10 23:03:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13789 states. [2021-03-10 23:03:28,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13789 to 3506. [2021-03-10 23:03:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 2.416833095577746) internal successors, (8471), 3505 states have internal predecessors, (8471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 8471 transitions. [2021-03-10 23:03:28,334 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 8471 transitions. Word has length 51 [2021-03-10 23:03:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:28,334 INFO L480 AbstractCegarLoop]: Abstraction has 3506 states and 8471 transitions. [2021-03-10 23:03:28,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 8471 transitions. [2021-03-10 23:03:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:03:28,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:28,337 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:28,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-03-10 23:03:28,550 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:28,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:28,550 INFO L82 PathProgramCache]: Analyzing trace with hash -547770827, now seen corresponding path program 73 times [2021-03-10 23:03:28,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:28,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488071675] [2021-03-10 23:03:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:29,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488071675] [2021-03-10 23:03:29,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049446500] [2021-03-10 23:03:29,204 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 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 23:03:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:29,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 23:03:29,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:31,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:31,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-03-10 23:03:31,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234672596] [2021-03-10 23:03:31,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-03-10 23:03:31,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:31,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-03-10 23:03:31,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:03:31,050 INFO L87 Difference]: Start difference. First operand 3506 states and 8471 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:43,746 INFO L93 Difference]: Finished difference Result 14360 states and 31107 transitions. [2021-03-10 23:03:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-03-10 23:03:43,749 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 23:03:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:43,768 INFO L225 Difference]: With dead ends: 14360 [2021-03-10 23:03:43,769 INFO L226 Difference]: Without dead ends: 13892 [2021-03-10 23:03:43,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11895 ImplicationChecksByTransitivity, 11019.8ms TimeCoverageRelationStatistics Valid=5935, Invalid=25571, Unknown=0, NotChecked=0, Total=31506 [2021-03-10 23:03:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13892 states. [2021-03-10 23:03:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13892 to 3518. [2021-03-10 23:03:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3517 states have (on average 2.415410861529713) internal successors, (8495), 3517 states have internal predecessors, (8495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 8495 transitions. [2021-03-10 23:03:43,864 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 8495 transitions. Word has length 51 [2021-03-10 23:03:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:43,864 INFO L480 AbstractCegarLoop]: Abstraction has 3518 states and 8495 transitions. [2021-03-10 23:03:43,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 8495 transitions. [2021-03-10 23:03:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:03:43,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:43,867 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:44,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:44,071 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:44,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:44,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1021996473, now seen corresponding path program 74 times [2021-03-10 23:03:44,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:44,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229388401] [2021-03-10 23:03:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:44,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229388401] [2021-03-10 23:03:44,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423356898] [2021-03-10 23:03:44,534 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 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 23:03:44,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:03:44,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:03:44,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:46,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:46,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-03-10 23:03:46,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366877594] [2021-03-10 23:03:46,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-03-10 23:03:46,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:46,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-03-10 23:03:46,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:03:46,309 INFO L87 Difference]: Start difference. First operand 3518 states and 8495 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:57,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:57,756 INFO L93 Difference]: Finished difference Result 11991 states and 26143 transitions. [2021-03-10 23:03:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-03-10 23:03:57,760 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 23:03:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:57,775 INFO L225 Difference]: With dead ends: 11991 [2021-03-10 23:03:57,775 INFO L226 Difference]: Without dead ends: 11337 [2021-03-10 23:03:57,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9503 ImplicationChecksByTransitivity, 10031.4ms TimeCoverageRelationStatistics Valid=5557, Invalid=21833, Unknown=0, NotChecked=0, Total=27390 [2021-03-10 23:03:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-03-10 23:03:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 3645. [2021-03-10 23:03:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 2.372941822173436) internal successors, (8647), 3644 states have internal predecessors, (8647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 8647 transitions. [2021-03-10 23:03:57,856 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 8647 transitions. Word has length 51 [2021-03-10 23:03:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:57,856 INFO L480 AbstractCegarLoop]: Abstraction has 3645 states and 8647 transitions. [2021-03-10 23:03:57,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 8647 transitions. [2021-03-10 23:03:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:03:57,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:57,859 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:58,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:58,071 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:58,071 INFO L82 PathProgramCache]: Analyzing trace with hash -2045072061, now seen corresponding path program 75 times [2021-03-10 23:03:58,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:58,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045229713] [2021-03-10 23:03:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:58,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045229713] [2021-03-10 23:03:58,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868881824] [2021-03-10 23:03:58,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:03:58,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 23:03:58,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:03:58,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:00,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:00,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 37 [2021-03-10 23:04:00,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251185950] [2021-03-10 23:04:00,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:04:00,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:00,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:04:00,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:04:00,167 INFO L87 Difference]: Start difference. First operand 3645 states and 8647 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 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 23:04:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:20,039 INFO L93 Difference]: Finished difference Result 8265 states and 18251 transitions. [2021-03-10 23:04:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-03-10 23:04:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 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 51 [2021-03-10 23:04:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:20,053 INFO L225 Difference]: With dead ends: 8265 [2021-03-10 23:04:20,053 INFO L226 Difference]: Without dead ends: 8261 [2021-03-10 23:04:20,055 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22325 ImplicationChecksByTransitivity, 18142.6ms TimeCoverageRelationStatistics Valid=11066, Invalid=40690, Unknown=0, NotChecked=0, Total=51756 [2021-03-10 23:04:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8261 states. [2021-03-10 23:04:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8261 to 3715. [2021-03-10 23:04:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3715 states, 3714 states have (on average 2.389876144318794) internal successors, (8876), 3714 states have internal predecessors, (8876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3715 states to 3715 states and 8876 transitions. [2021-03-10 23:04:20,146 INFO L78 Accepts]: Start accepts. Automaton has 3715 states and 8876 transitions. Word has length 51 [2021-03-10 23:04:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:20,146 INFO L480 AbstractCegarLoop]: Abstraction has 3715 states and 8876 transitions. [2021-03-10 23:04:20,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 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 23:04:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3715 states and 8876 transitions. [2021-03-10 23:04:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 23:04:20,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:20,150 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:20,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:04:20,359 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:20,360 INFO L82 PathProgramCache]: Analyzing trace with hash -607302967, now seen corresponding path program 76 times [2021-03-10 23:04:20,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:20,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958151254] [2021-03-10 23:04:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:21,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958151254] [2021-03-10 23:04:21,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623050364] [2021-03-10 23:04:21,188 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 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 23:04:21,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:04:21,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:21,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 23:04:21,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:23,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:23,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-03-10 23:04:23,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353296819] [2021-03-10 23:04:23,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-03-10 23:04:23,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:23,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-03-10 23:04:23,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:04:23,727 INFO L87 Difference]: Start difference. First operand 3715 states and 8876 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:39,639 INFO L93 Difference]: Finished difference Result 5654 states and 12623 transitions. [2021-03-10 23:04:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-03-10 23:04:39,642 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 23:04:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:39,649 INFO L225 Difference]: With dead ends: 5654 [2021-03-10 23:04:39,649 INFO L226 Difference]: Without dead ends: 5342 [2021-03-10 23:04:39,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 14589.0ms TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-03-10 23:04:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5342 states. [2021-03-10 23:04:39,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5342 to 3714. [2021-03-10 23:04:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.3859412873687047) internal successors, (8859), 3713 states have internal predecessors, (8859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 8859 transitions. [2021-03-10 23:04:39,700 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 8859 transitions. Word has length 53 [2021-03-10 23:04:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:39,700 INFO L480 AbstractCegarLoop]: Abstraction has 3714 states and 8859 transitions. [2021-03-10 23:04:39,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 8859 transitions. [2021-03-10 23:04:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 23:04:39,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:39,704 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:39,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-03-10 23:04:39,905 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:39,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1343145563, now seen corresponding path program 77 times [2021-03-10 23:04:39,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:39,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606537513] [2021-03-10 23:04:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:40,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606537513] [2021-03-10 23:04:40,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791123759] [2021-03-10 23:04:40,397 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 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 23:04:40,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-03-10 23:04:40,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:04:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:43,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:43,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2021-03-10 23:04:43,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578447616] [2021-03-10 23:04:43,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:04:43,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:04:43,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:04:43,032 INFO L87 Difference]: Start difference. First operand 3714 states and 8859 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:01,811 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:05:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:12,220 INFO L93 Difference]: Finished difference Result 5232 states and 11847 transitions. [2021-03-10 23:05:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-03-10 23:05:12,223 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 23:05:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:12,230 INFO L225 Difference]: With dead ends: 5232 [2021-03-10 23:05:12,230 INFO L226 Difference]: Without dead ends: 5228 [2021-03-10 23:05:12,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32350 ImplicationChecksByTransitivity, 28047.5ms TimeCoverageRelationStatistics Valid=15661, Invalid=56431, Unknown=0, NotChecked=0, Total=72092 [2021-03-10 23:05:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2021-03-10 23:05:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 3714. [2021-03-10 23:05:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.3856719633719363) internal successors, (8858), 3713 states have internal predecessors, (8858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 8858 transitions. [2021-03-10 23:05:12,283 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 8858 transitions. Word has length 53 [2021-03-10 23:05:12,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:12,283 INFO L480 AbstractCegarLoop]: Abstraction has 3714 states and 8858 transitions. [2021-03-10 23:05:12,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 8858 transitions. [2021-03-10 23:05:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:05:12,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:12,288 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:12,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-03-10 23:05:12,489 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash -425284857, now seen corresponding path program 78 times [2021-03-10 23:05:12,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:12,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119765507] [2021-03-10 23:05:12,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:13,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119765507] [2021-03-10 23:05:13,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639578896] [2021-03-10 23:05:13,168 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 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 23:05:13,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 23:05:13,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:13,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:05:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:13,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:13,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 23:05:13,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14753073] [2021-03-10 23:05:13,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:05:13,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:13,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:05:13,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:05:13,889 INFO L87 Difference]: Start difference. First operand 3714 states and 8858 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:14,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:14,880 INFO L93 Difference]: Finished difference Result 4862 states and 11399 transitions. [2021-03-10 23:05:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:05:14,884 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:05:14,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:14,890 INFO L225 Difference]: With dead ends: 4862 [2021-03-10 23:05:14,890 INFO L226 Difference]: Without dead ends: 4787 [2021-03-10 23:05:14,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:05:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4787 states. [2021-03-10 23:05:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4787 to 4330. [2021-03-10 23:05:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4329 states have (on average 2.414876414876415) internal successors, (10454), 4329 states have internal predecessors, (10454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 10454 transitions. [2021-03-10 23:05:14,949 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 10454 transitions. Word has length 55 [2021-03-10 23:05:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:14,950 INFO L480 AbstractCegarLoop]: Abstraction has 4330 states and 10454 transitions. [2021-03-10 23:05:14,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 10454 transitions. [2021-03-10 23:05:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:05:14,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:14,955 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:15,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:15,163 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:15,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:15,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1144269145, now seen corresponding path program 79 times [2021-03-10 23:05:15,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:15,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012124281] [2021-03-10 23:05:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:16,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012124281] [2021-03-10 23:05:16,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22476071] [2021-03-10 23:05:16,917 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:16,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-03-10 23:05:16,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:20,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:20,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-03-10 23:05:20,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653244923] [2021-03-10 23:05:20,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-03-10 23:05:20,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:20,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-03-10 23:05:20,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:05:20,870 INFO L87 Difference]: Start difference. First operand 4330 states and 10454 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:44,087 INFO L93 Difference]: Finished difference Result 5933 states and 13623 transitions. [2021-03-10 23:05:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-03-10 23:05:44,092 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:05:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:44,100 INFO L225 Difference]: With dead ends: 5933 [2021-03-10 23:05:44,100 INFO L226 Difference]: Without dead ends: 5927 [2021-03-10 23:05:44,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 15653.7ms TimeCoverageRelationStatistics Valid=1222, Invalid=15548, Unknown=0, NotChecked=0, Total=16770 [2021-03-10 23:05:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2021-03-10 23:05:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 4297. [2021-03-10 23:05:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4297 states, 4296 states have (on average 2.416201117318436) internal successors, (10380), 4296 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 10380 transitions. [2021-03-10 23:05:44,166 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 10380 transitions. Word has length 55 [2021-03-10 23:05:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:44,166 INFO L480 AbstractCegarLoop]: Abstraction has 4297 states and 10380 transitions. [2021-03-10 23:05:44,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 10380 transitions. [2021-03-10 23:05:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:05:44,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:44,171 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:44,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:05:44,372 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:44,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1722012963, now seen corresponding path program 80 times [2021-03-10 23:05:44,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:44,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525610183] [2021-03-10 23:05:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:45,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525610183] [2021-03-10 23:05:45,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889183181] [2021-03-10 23:05:45,341 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 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 23:05:45,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:05:45,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-03-10 23:05:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:49,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:49,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2021-03-10 23:05:49,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79275510] [2021-03-10 23:05:49,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-03-10 23:05:49,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:49,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-03-10 23:05:49,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:05:49,011 INFO L87 Difference]: Start difference. First operand 4297 states and 10380 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:23,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:23,026 INFO L93 Difference]: Finished difference Result 8896 states and 19852 transitions. [2021-03-10 23:06:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-03-10 23:06:23,030 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:06:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:23,044 INFO L225 Difference]: With dead ends: 8896 [2021-03-10 23:06:23,044 INFO L226 Difference]: Without dead ends: 8872 [2021-03-10 23:06:23,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 18372.9ms TimeCoverageRelationStatistics Valid=2202, Invalid=23238, Unknown=0, NotChecked=0, Total=25440 [2021-03-10 23:06:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8872 states. [2021-03-10 23:06:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8872 to 4583. [2021-03-10 23:06:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 2.4203404626800524) internal successors, (11090), 4582 states have internal predecessors, (11090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 11090 transitions. [2021-03-10 23:06:23,133 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 11090 transitions. Word has length 55 [2021-03-10 23:06:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:23,133 INFO L480 AbstractCegarLoop]: Abstraction has 4583 states and 11090 transitions. [2021-03-10 23:06:23,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 11090 transitions. [2021-03-10 23:06:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:06:23,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:23,138 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:23,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:23,339 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1842588423, now seen corresponding path program 81 times [2021-03-10 23:06:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:23,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383028780] [2021-03-10 23:06:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:24,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383028780] [2021-03-10 23:06:24,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368688466] [2021-03-10 23:06:24,428 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 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 23:06:24,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 23:06:24,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:24,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-03-10 23:06:24,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:28,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:28,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-03-10 23:06:28,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209138446] [2021-03-10 23:06:28,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-03-10 23:06:28,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-03-10 23:06:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:06:28,257 INFO L87 Difference]: Start difference. First operand 4583 states and 11090 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:42,934 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:06:52,630 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:06:53,744 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:06:55,249 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:06:56,148 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:06:57,904 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:06:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:58,529 INFO L93 Difference]: Finished difference Result 6731 states and 15383 transitions. [2021-03-10 23:06:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-03-10 23:06:58,535 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:06:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:58,546 INFO L225 Difference]: With dead ends: 6731 [2021-03-10 23:06:58,546 INFO L226 Difference]: Without dead ends: 6727 [2021-03-10 23:06:58,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 16629.1ms TimeCoverageRelationStatistics Valid=1571, Invalid=15985, Unknown=0, NotChecked=0, Total=17556 [2021-03-10 23:06:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2021-03-10 23:06:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 4364. [2021-03-10 23:06:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4363 states have (on average 2.418748567499427) internal successors, (10553), 4363 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 10553 transitions. [2021-03-10 23:06:58,624 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 10553 transitions. Word has length 55 [2021-03-10 23:06:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:58,624 INFO L480 AbstractCegarLoop]: Abstraction has 4364 states and 10553 transitions. [2021-03-10 23:06:58,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 10553 transitions. [2021-03-10 23:06:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:06:58,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:58,629 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:58,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:58,830 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:58,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1694161249, now seen corresponding path program 82 times [2021-03-10 23:06:58,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:58,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108649906] [2021-03-10 23:06:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:00,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108649906] [2021-03-10 23:07:00,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30911316] [2021-03-10 23:07:00,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:07:00,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:07:00,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-03-10 23:07:00,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:04,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:04,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-03-10 23:07:04,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511326459] [2021-03-10 23:07:04,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-03-10 23:07:04,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-03-10 23:07:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:07:04,157 INFO L87 Difference]: Start difference. First operand 4364 states and 10553 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:21,349 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:07:23,116 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 23:07:28,388 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-10 23:07:30,989 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:07:31,791 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:07:32,615 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:07:33,965 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-03-10 23:07:36,475 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-03-10 23:07:38,579 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:07:39,563 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:07:39,891 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:07:40,575 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-03-10 23:07:41,482 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:07:42,795 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:07:43,084 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:07:45,371 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:07:45,682 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:07:46,281 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-03-10 23:07:46,866 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:07:49,093 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:07:49,443 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:07:50,160 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-03-10 23:07:52,119 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:07:52,496 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-03-10 23:07:54,085 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-03-10 23:07:54,428 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:07:55,119 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-03-10 23:07:55,813 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-10 23:07:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:58,060 INFO L93 Difference]: Finished difference Result 10574 states and 23371 transitions. [2021-03-10 23:07:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-03-10 23:07:58,065 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:07:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:58,081 INFO L225 Difference]: With dead ends: 10574 [2021-03-10 23:07:58,082 INFO L226 Difference]: Without dead ends: 10526 [2021-03-10 23:07:58,083 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13796 ImplicationChecksByTransitivity, 29145.0ms TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-03-10 23:07:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10526 states. [2021-03-10 23:07:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10526 to 4384. [2021-03-10 23:07:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 2.4177503992699063) internal successors, (10597), 4383 states have internal predecessors, (10597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 10597 transitions. [2021-03-10 23:07:58,184 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 10597 transitions. Word has length 55 [2021-03-10 23:07:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:58,184 INFO L480 AbstractCegarLoop]: Abstraction has 4384 states and 10597 transitions. [2021-03-10 23:07:58,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 10597 transitions. [2021-03-10 23:07:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:07:58,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:58,190 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:58,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-03-10 23:07:58,391 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:58,391 INFO L82 PathProgramCache]: Analyzing trace with hash 661255397, now seen corresponding path program 83 times [2021-03-10 23:07:58,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:58,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645575708] [2021-03-10 23:07:58,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:59,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645575708] [2021-03-10 23:07:59,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139413284] [2021-03-10 23:07:59,770 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 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 23:07:59,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-03-10 23:07:59,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:07:59,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:07:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:04,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:04,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 45 [2021-03-10 23:08:04,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683958355] [2021-03-10 23:08:04,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-03-10 23:08:04,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:04,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-03-10 23:08:04,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1840, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:08:04,463 INFO L87 Difference]: Start difference. First operand 4384 states and 10597 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:12,354 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:08:12,601 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:08:16,247 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:08:17,222 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2021-03-10 23:08:18,267 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:08:20,124 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:08:20,478 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:08:20,828 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:08:21,244 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:08:21,580 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:08:22,440 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-10 23:08:25,425 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:08:26,083 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:08:27,817 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:08:29,777 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:08:30,127 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:08:30,729 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:08:31,080 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:08:31,402 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-03-10 23:08:32,388 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-10 23:08:32,900 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:08:33,373 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:08:34,529 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:08:34,884 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:08:36,220 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:08:36,469 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-03-10 23:08:36,773 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:08:37,143 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:08:37,883 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:08:38,401 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:08:39,244 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:08:39,532 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:08:39,838 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:08:40,095 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-10 23:08:40,960 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:08:42,422 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:08:43,593 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:08:43,841 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:08:45,582 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:08:45,858 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:08:46,366 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:08:47,923 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:08:48,946 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:08:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:52,348 INFO L93 Difference]: Finished difference Result 12886 states and 28355 transitions. [2021-03-10 23:08:52,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-03-10 23:08:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:08:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:52,376 INFO L225 Difference]: With dead ends: 12886 [2021-03-10 23:08:52,377 INFO L226 Difference]: Without dead ends: 12808 [2021-03-10 23:08:52,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17184 ImplicationChecksByTransitivity, 31567.2ms TimeCoverageRelationStatistics Valid=5283, Invalid=40727, Unknown=0, NotChecked=0, Total=46010 [2021-03-10 23:08:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12808 states. [2021-03-10 23:08:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12808 to 4292. [2021-03-10 23:08:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4292 states, 4291 states have (on average 2.4150547657888604) internal successors, (10363), 4291 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 10363 transitions. [2021-03-10 23:08:52,503 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 10363 transitions. Word has length 55 [2021-03-10 23:08:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:52,503 INFO L480 AbstractCegarLoop]: Abstraction has 4292 states and 10363 transitions. [2021-03-10 23:08:52,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 10363 transitions. [2021-03-10 23:08:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:08:52,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:52,509 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:52,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-03-10 23:08:52,710 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1592574615, now seen corresponding path program 84 times [2021-03-10 23:08:52,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:52,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783651734] [2021-03-10 23:08:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:54,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783651734] [2021-03-10 23:08:54,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012618788] [2021-03-10 23:08:54,246 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 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 23:08:54,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-03-10 23:08:54,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:54,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-03-10 23:08:54,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:58,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:58,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 46 [2021-03-10 23:08:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498464283] [2021-03-10 23:08:58,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-03-10 23:08:58,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:58,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-03-10 23:08:58,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:08:58,529 INFO L87 Difference]: Start difference. First operand 4292 states and 10363 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:59,512 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:08:59,838 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 23:09:00,578 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-03-10 23:09:01,200 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:09:01,768 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 23:09:02,411 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-03-10 23:09:06,988 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:09:07,292 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:09:09,767 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:09:10,158 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:09:10,472 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-03-10 23:09:11,382 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:09:11,811 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-03-10 23:09:15,282 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:09:15,721 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-10 23:09:17,348 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:09:17,764 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:09:18,117 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:09:18,815 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-10 23:09:19,449 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:09:19,867 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:09:20,304 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:09:21,125 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 23:09:21,542 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:09:21,987 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:09:22,706 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:09:23,952 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:09:24,357 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:09:25,726 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:09:27,415 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:09:27,813 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:09:29,064 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:09:29,494 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:09:30,629 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 23:09:31,058 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:09:32,466 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:09:33,439 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-03-10 23:09:34,247 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:09:34,896 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:09:35,843 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:09:36,293 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:09:36,674 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:09:37,421 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:09:37,648 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:09:37,878 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:09:38,290 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:09:38,740 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:09:39,745 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:09:39,970 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:09:40,759 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:09:41,580 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:09:41,800 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:09:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:44,198 INFO L93 Difference]: Finished difference Result 15118 states and 33071 transitions. [2021-03-10 23:09:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-03-10 23:09:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:09:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:44,233 INFO L225 Difference]: With dead ends: 15118 [2021-03-10 23:09:44,233 INFO L226 Difference]: Without dead ends: 15004 [2021-03-10 23:09:44,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15794 ImplicationChecksByTransitivity, 30439.2ms TimeCoverageRelationStatistics Valid=5619, Invalid=36201, Unknown=0, NotChecked=0, Total=41820 [2021-03-10 23:09:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15004 states. [2021-03-10 23:09:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15004 to 4240. [2021-03-10 23:09:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4239 states have (on average 2.420146260910592) internal successors, (10259), 4239 states have internal predecessors, (10259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 10259 transitions. [2021-03-10 23:09:44,370 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 10259 transitions. Word has length 55 [2021-03-10 23:09:44,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:44,370 INFO L480 AbstractCegarLoop]: Abstraction has 4240 states and 10259 transitions. [2021-03-10 23:09:44,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 10259 transitions. [2021-03-10 23:09:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:09:44,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:44,375 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:44,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-03-10 23:09:44,576 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1315992301, now seen corresponding path program 85 times [2021-03-10 23:09:44,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:44,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814087597] [2021-03-10 23:09:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:46,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814087597] [2021-03-10 23:09:46,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890580757] [2021-03-10 23:09:46,228 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 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 23:09:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:09:46,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:51,322 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-03-10 23:09:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:51,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:51,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2021-03-10 23:09:51,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406676080] [2021-03-10 23:09:51,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-03-10 23:09:51,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:51,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-03-10 23:09:51,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:09:51,377 INFO L87 Difference]: Start difference. First operand 4240 states and 10259 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:52,059 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:09:52,307 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 23:09:53,634 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 23:09:54,218 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-03-10 23:09:54,711 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-03-10 23:09:57,406 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-10 23:09:58,672 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:09:58,954 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-03-10 23:10:00,146 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:10:00,407 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:10:01,505 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:10:02,347 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 23:10:02,599 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-10 23:10:03,305 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-10 23:10:03,670 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:10:04,952 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:10:05,346 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:10:05,647 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:10:07,373 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:10:07,732 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:10:08,565 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:10:08,924 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:10:09,979 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-10 23:10:10,357 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:10:11,204 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:10:11,581 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:10:13,281 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:10:14,111 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-03-10 23:10:14,922 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:10:18,166 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-10 23:10:19,479 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:10:19,981 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 23:10:20,530 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:10:21,040 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 23:10:21,591 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:10:21,929 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 23:10:22,301 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:10:22,658 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 23:10:22,984 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:10:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:10:23,425 INFO L93 Difference]: Finished difference Result 17236 states and 37602 transitions. [2021-03-10 23:10:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-03-10 23:10:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:10:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:10:23,468 INFO L225 Difference]: With dead ends: 17236 [2021-03-10 23:10:23,469 INFO L226 Difference]: Without dead ends: 16966 [2021-03-10 23:10:23,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9949 ImplicationChecksByTransitivity, 26105.7ms TimeCoverageRelationStatistics Valid=4135, Invalid=23255, Unknown=0, NotChecked=0, Total=27390 [2021-03-10 23:10:23,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2021-03-10 23:10:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 4264. [2021-03-10 23:10:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4263 states have (on average 2.4177809054656345) internal successors, (10307), 4263 states have internal predecessors, (10307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 10307 transitions. [2021-03-10 23:10:23,651 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 10307 transitions. Word has length 55 [2021-03-10 23:10:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:10:23,651 INFO L480 AbstractCegarLoop]: Abstraction has 4264 states and 10307 transitions. [2021-03-10 23:10:23,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 10307 transitions. [2021-03-10 23:10:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:10:23,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:10:23,656 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:10:23,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:23,857 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:10:23,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:10:23,857 INFO L82 PathProgramCache]: Analyzing trace with hash -469019279, now seen corresponding path program 86 times [2021-03-10 23:10:23,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:10:23,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022110175] [2021-03-10 23:10:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:10:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:10:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:25,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022110175] [2021-03-10 23:10:25,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869516424] [2021-03-10 23:10:25,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:25,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:10:25,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:10:25,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:10:25,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:10:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:30,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:10:30,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-03-10 23:10:30,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835786276] [2021-03-10 23:10:30,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-03-10 23:10:30,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:10:30,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-03-10 23:10:30,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1974, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:10:30,872 INFO L87 Difference]: Start difference. First operand 4264 states and 10307 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:31,207 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-10 23:10:31,450 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:10:31,787 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:10:32,130 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 23:10:32,524 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-03-10 23:10:32,872 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-03-10 23:10:33,443 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:10:34,022 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 23:10:35,563 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-03-10 23:10:37,422 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-10 23:10:37,759 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:10:38,792 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:10:39,133 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 23:10:40,812 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:10:41,132 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-10 23:10:42,469 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:10:42,808 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:10:43,547 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 23:10:44,249 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-10 23:10:44,729 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:10:45,392 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-10 23:10:45,792 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-03-10 23:10:46,442 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:10:48,328 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:10:49,913 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:10:50,474 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2021-03-10 23:10:51,521 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-03-10 23:10:52,503 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:11:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:05,858 INFO L93 Difference]: Finished difference Result 18169 states and 39525 transitions. [2021-03-10 23:11:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-03-10 23:11:05,866 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:11:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:05,903 INFO L225 Difference]: With dead ends: 18169 [2021-03-10 23:11:05,904 INFO L226 Difference]: Without dead ends: 17716 [2021-03-10 23:11:05,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12252 ImplicationChecksByTransitivity, 27937.8ms TimeCoverageRelationStatistics Valid=5504, Invalid=27438, Unknown=0, NotChecked=0, Total=32942 [2021-03-10 23:11:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17716 states. [2021-03-10 23:11:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17716 to 4280. [2021-03-10 23:11:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 2.4162187426968917) internal successors, (10339), 4279 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 10339 transitions. [2021-03-10 23:11:06,074 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 10339 transitions. Word has length 55 [2021-03-10 23:11:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:06,075 INFO L480 AbstractCegarLoop]: Abstraction has 4280 states and 10339 transitions. [2021-03-10 23:11:06,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 10339 transitions. [2021-03-10 23:11:06,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:11:06,080 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:06,080 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:06,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2021-03-10 23:11:06,280 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash -897735435, now seen corresponding path program 87 times [2021-03-10 23:11:06,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:06,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334371435] [2021-03-10 23:11:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:08,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334371435] [2021-03-10 23:11:08,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593864312] [2021-03-10 23:11:08,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:08,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 23:11:08,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:08,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:11:08,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:12,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:12,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-03-10 23:11:12,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677273424] [2021-03-10 23:11:12,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-03-10 23:11:12,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:12,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-03-10 23:11:12,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:11:12,452 INFO L87 Difference]: Start difference. First operand 4280 states and 10339 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:33,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:33,474 INFO L93 Difference]: Finished difference Result 15803 states and 33500 transitions. [2021-03-10 23:11:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-03-10 23:11:33,479 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:11:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:33,523 INFO L225 Difference]: With dead ends: 15803 [2021-03-10 23:11:33,523 INFO L226 Difference]: Without dead ends: 15200 [2021-03-10 23:11:33,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14062 ImplicationChecksByTransitivity, 19353.7ms TimeCoverageRelationStatistics Valid=7026, Invalid=30416, Unknown=0, NotChecked=0, Total=37442 [2021-03-10 23:11:33,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15200 states. [2021-03-10 23:11:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15200 to 4292. [2021-03-10 23:11:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4292 states, 4291 states have (on average 2.4150547657888604) internal successors, (10363), 4291 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 10363 transitions. [2021-03-10 23:11:33,609 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 10363 transitions. Word has length 55 [2021-03-10 23:11:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:33,609 INFO L480 AbstractCegarLoop]: Abstraction has 4292 states and 10363 transitions. [2021-03-10 23:11:33,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:33,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 10363 transitions. [2021-03-10 23:11:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:11:33,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:33,612 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:33,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-03-10 23:11:33,813 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1703861895, now seen corresponding path program 88 times [2021-03-10 23:11:33,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:33,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324391949] [2021-03-10 23:11:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:34,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324391949] [2021-03-10 23:11:34,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624393348] [2021-03-10 23:11:34,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:34,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:11:34,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 23:11:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:38,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:38,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-03-10 23:11:38,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354791030] [2021-03-10 23:11:38,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-03-10 23:11:38,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:38,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-03-10 23:11:38,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:11:38,148 INFO L87 Difference]: Start difference. First operand 4292 states and 10363 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:59,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:59,195 INFO L93 Difference]: Finished difference Result 14668 states and 31991 transitions. [2021-03-10 23:11:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-03-10 23:11:59,201 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:11:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:59,221 INFO L225 Difference]: With dead ends: 14668 [2021-03-10 23:11:59,222 INFO L226 Difference]: Without dead ends: 13867 [2021-03-10 23:11:59,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13296 ImplicationChecksByTransitivity, 18980.5ms TimeCoverageRelationStatistics Valid=7677, Invalid=29379, Unknown=0, NotChecked=0, Total=37056 [2021-03-10 23:11:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13867 states. [2021-03-10 23:11:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13867 to 4451. [2021-03-10 23:11:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4451 states, 4450 states have (on average 2.3741573033707866) internal successors, (10565), 4450 states have internal predecessors, (10565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4451 states to 4451 states and 10565 transitions. [2021-03-10 23:11:59,318 INFO L78 Accepts]: Start accepts. Automaton has 4451 states and 10565 transitions. Word has length 55 [2021-03-10 23:11:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:59,318 INFO L480 AbstractCegarLoop]: Abstraction has 4451 states and 10565 transitions. [2021-03-10 23:11:59,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4451 states and 10565 transitions. [2021-03-10 23:11:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:11:59,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:59,322 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:59,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:59,523 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash 335036743, now seen corresponding path program 89 times [2021-03-10 23:11:59,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:59,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346844159] [2021-03-10 23:11:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:00,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346844159] [2021-03-10 23:12:00,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910216303] [2021-03-10 23:12:00,233 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 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 23:12:00,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-03-10 23:12:00,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:00,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:12:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:03,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:03,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 40 [2021-03-10 23:12:03,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801217116] [2021-03-10 23:12:03,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-03-10 23:12:03,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:03,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-03-10 23:12:03,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:12:03,656 INFO L87 Difference]: Start difference. First operand 4451 states and 10565 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-03-10 23:12:24,364 WARN L222 SmtUtils]: Removed 4 from assertion stack [2021-03-10 23:12:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-03-10 23:12:24,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:24,565 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:12:24,569 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:12:24,569 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:12:24 BasicIcfg [2021-03-10 23:12:24,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:12:24,570 INFO L168 Benchmark]: Toolchain (without parser) took 835007.17 ms. Allocated memory was 255.9 MB in the beginning and 536.9 MB in the end (delta: 281.0 MB). Free memory was 236.3 MB in the beginning and 476.4 MB in the end (delta: -240.2 MB). Peak memory consumption was 334.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:12:24,570 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:12:24,570 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.79 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:12:24,570 INFO L168 Benchmark]: Boogie Preprocessor took 13.51 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 949.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:12:24,570 INFO L168 Benchmark]: RCFGBuilder took 176.87 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 238.4 MB in the end (delta: -5.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-10 23:12:24,570 INFO L168 Benchmark]: TraceAbstraction took 834789.92 ms. Allocated memory was 255.9 MB in the beginning and 536.9 MB in the end (delta: 281.0 MB). Free memory was 237.7 MB in the beginning and 476.4 MB in the end (delta: -238.7 MB). Peak memory consumption was 334.8 MB. Max. memory is 16.0 GB. [2021-03-10 23:12:24,570 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 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.79 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.51 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 949.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 176.87 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 238.4 MB in the end (delta: -5.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 834789.92 ms. Allocated memory was 255.9 MB in the beginning and 536.9 MB in the end (delta: 281.0 MB). Free memory was 237.7 MB in the beginning and 476.4 MB in the end (delta: -238.7 MB). Peak memory consumption was 334.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 50). Cancelled while BasicCegarLoop was constructing difference of abstraction (4451states) and FLOYD_HOARE automaton (currently 153 states, 41 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 19 for 71ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 834729.0ms, OverallIterations: 91, TraceHistogramMax: 10, EmptinessCheckTime: 208.3ms, AutomataDifference: 687167.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4488 SDtfs, 35229 SDslu, 63240 SDs, 0 SdLazy, 156831 SolverSat, 10569 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 83983.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11729 GetRequests, 2561 SyntacticMatches, 60 SemanticMatches, 9107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465976 ImplicationChecksByTransitivity, 515664.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4583occurred in iteration=82, InterpolantAutomatonStates: 6865, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3744.7ms AutomataMinimizationTime, 90 MinimizatonAttempts, 266409 StatesRemovedByMinimization, 90 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 365.4ms SsaConstructionTime, 1628.1ms SatisfiabilityAnalysisTime, 121617.5ms InterpolantComputationTime, 7354 NumberOfCodeBlocks, 7354 NumberOfCodeBlocksAsserted, 555 NumberOfCheckSat, 7174 ConstructedInterpolants, 0 QuantifiedInterpolants, 63015 SizeOfPredicates, 319 NumberOfNonLiveVariables, 8396 ConjunctsInSsa, 2919 ConjunctsInUnsatCore, 180 InterpolantComputations, 2 PerfectInterpolantSequences, 2939/17631 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