/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/chl/array-int-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:43:24,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:43:24,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:43:24,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:43:24,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 20:43:24,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 20:43:24,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 20:43:24,642 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 [2021-05-21 20:43:24,670 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:43:24,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:43:24,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:43:24,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:43:24,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:43:24,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:43:24,673 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:43:24,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:43:24,673 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:43:24,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:43:24,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:43:24,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:43:24,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:43:24,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:43:24,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:43:24,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:43:24,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:43:24,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:43:24,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:43:24,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:43:24,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:43:24,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:43:24,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:43:24,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:43:24,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:43:24,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:43:24,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:43:24,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:43:24,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:43:24,675 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:43:24,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:43:24,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:43:24,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:43:24,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:43:24,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:43:24,939 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:43:24,940 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:43:24,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl [2021-05-21 20:43:25,133 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl' [2021-05-21 20:43:25,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:43:25,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:43:25,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:43:25,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:43:25,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:43:25,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (1/1) ... [2021-05-21 20:43:25,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (1/1) ... [2021-05-21 20:43:25,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:43:25,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:43:25,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:43:25,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:43:25,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (1/1) ... [2021-05-21 20:43:25,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (1/1) ... [2021-05-21 20:43:25,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (1/1) ... [2021-05-21 20:43:25,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (1/1) ... [2021-05-21 20:43:25,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (1/1) ... [2021-05-21 20:43:25,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (1/1) ... [2021-05-21 20:43:25,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (1/1) ... [2021-05-21 20:43:25,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:43:25,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:43:25,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:43:25,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:43:25,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (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 [2021-05-21 20:43:25,400 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:43:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:43:25,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:43:25,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:43:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:43:25,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:43:25,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:43:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:43:25,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:43:25,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:43:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:43:25,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:43:25,402 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:43:25,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:43:25,644 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-21 20:43:25,645 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-21 20:43:25,645 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-21 20:43:25,645 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-05-21 20:43:25,646 INFO L202 PluginConnector]: Adding new model array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:43:25 BoogieIcfgContainer [2021-05-21 20:43:25,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:43:25,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:43:25,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:43:25,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:43:25,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:43:25" (1/2) ... [2021-05-21 20:43:25,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0e66e5 and model type array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:43:25, skipping insertion in model container [2021-05-21 20:43:25,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:43:25" (2/2) ... [2021-05-21 20:43:25,650 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-subst.wvr.bpl [2021-05-21 20:43:25,654 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:43:25,654 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:43:25,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:43:25,654 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:43:25,716 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 20:43:25,731 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 20:43:25,756 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:43:25,756 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:43:25,757 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:43:25,758 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:43:25,759 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:43:25,759 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:43:25,759 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:43:25,759 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:43:25,766 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 68 flow [2021-05-21 20:43:25,779 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:43:25,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:25,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:25,787 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2084068600, now seen corresponding path program 1 times [2021-05-21 20:43:25,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:25,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957500077] [2021-05-21 20:43:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:25,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:25,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957500077] [2021-05-21 20:43:25,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957500077] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:43:25,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:43:25,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:43:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531103766] [2021-05-21 20:43:25,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:43:25,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:43:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:43:25,973 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:26,062 INFO L93 Difference]: Finished difference Result 139 states and 379 transitions. [2021-05-21 20:43:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:43:26,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-21 20:43:26,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:26,070 INFO L225 Difference]: With dead ends: 139 [2021-05-21 20:43:26,071 INFO L226 Difference]: Without dead ends: 135 [2021-05-21 20:43:26,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:43:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-21 20:43:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-05-21 20:43:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.819277108433735) internal successors, (234), 83 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 234 transitions. [2021-05-21 20:43:26,098 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 234 transitions. Word has length 14 [2021-05-21 20:43:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:26,098 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 234 transitions. [2021-05-21 20:43:26,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 234 transitions. [2021-05-21 20:43:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:43:26,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:26,100 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:26,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:43:26,100 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:26,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1063669592, now seen corresponding path program 2 times [2021-05-21 20:43:26,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:26,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808129105] [2021-05-21 20:43:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:26,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:26,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808129105] [2021-05-21 20:43:26,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808129105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:43:26,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:43:26,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:43:26,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003890731] [2021-05-21 20:43:26,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:43:26,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:26,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:43:26,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:43:26,170 INFO L87 Difference]: Start difference. First operand 84 states and 234 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:26,266 INFO L93 Difference]: Finished difference Result 156 states and 429 transitions. [2021-05-21 20:43:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:43:26,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-21 20:43:26,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:26,269 INFO L225 Difference]: With dead ends: 156 [2021-05-21 20:43:26,269 INFO L226 Difference]: Without dead ends: 152 [2021-05-21 20:43:26,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:43:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-21 20:43:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2021-05-21 20:43:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.831460674157303) internal successors, (252), 89 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 252 transitions. [2021-05-21 20:43:26,288 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 252 transitions. Word has length 14 [2021-05-21 20:43:26,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:26,288 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 252 transitions. [2021-05-21 20:43:26,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 252 transitions. [2021-05-21 20:43:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:43:26,290 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:26,290 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:26,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:43:26,290 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:26,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:26,291 INFO L82 PathProgramCache]: Analyzing trace with hash 284971666, now seen corresponding path program 3 times [2021-05-21 20:43:26,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:26,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049407143] [2021-05-21 20:43:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:26,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:26,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049407143] [2021-05-21 20:43:26,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049407143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:43:26,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:43:26,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:43:26,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275392110] [2021-05-21 20:43:26,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:43:26,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:26,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:43:26,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:43:26,360 INFO L87 Difference]: Start difference. First operand 90 states and 252 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:26,437 INFO L93 Difference]: Finished difference Result 169 states and 467 transitions. [2021-05-21 20:43:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:43:26,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-21 20:43:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:26,441 INFO L225 Difference]: With dead ends: 169 [2021-05-21 20:43:26,441 INFO L226 Difference]: Without dead ends: 165 [2021-05-21 20:43:26,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:43:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-21 20:43:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2021-05-21 20:43:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.838709677419355) internal successors, (264), 93 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 264 transitions. [2021-05-21 20:43:26,457 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 264 transitions. Word has length 14 [2021-05-21 20:43:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:26,457 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 264 transitions. [2021-05-21 20:43:26,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 264 transitions. [2021-05-21 20:43:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:43:26,458 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:26,458 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:26,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:43:26,458 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:26,458 INFO L82 PathProgramCache]: Analyzing trace with hash -791726200, now seen corresponding path program 4 times [2021-05-21 20:43:26,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:26,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327418852] [2021-05-21 20:43:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:26,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:26,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327418852] [2021-05-21 20:43:26,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327418852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:43:26,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:43:26,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:43:26,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347648312] [2021-05-21 20:43:26,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:43:26,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:26,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:43:26,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:43:26,492 INFO L87 Difference]: Start difference. First operand 94 states and 264 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:26,553 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-05-21 20:43:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:43:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-21 20:43:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:26,554 INFO L225 Difference]: With dead ends: 173 [2021-05-21 20:43:26,554 INFO L226 Difference]: Without dead ends: 169 [2021-05-21 20:43:26,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:43:26,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-21 20:43:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-05-21 20:43:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.845360824742268) internal successors, (276), 97 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 276 transitions. [2021-05-21 20:43:26,584 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 276 transitions. Word has length 14 [2021-05-21 20:43:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:26,584 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 276 transitions. [2021-05-21 20:43:26,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 276 transitions. [2021-05-21 20:43:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:43:26,585 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:26,585 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:26,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:43:26,585 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:26,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1403359368, now seen corresponding path program 5 times [2021-05-21 20:43:26,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:26,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943587323] [2021-05-21 20:43:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:26,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:26,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943587323] [2021-05-21 20:43:26,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943587323] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:43:26,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:43:26,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:43:26,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206595684] [2021-05-21 20:43:26,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:43:26,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:26,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:43:26,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:43:26,651 INFO L87 Difference]: Start difference. First operand 98 states and 276 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:26,716 INFO L93 Difference]: Finished difference Result 176 states and 489 transitions. [2021-05-21 20:43:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:43:26,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-21 20:43:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:26,717 INFO L225 Difference]: With dead ends: 176 [2021-05-21 20:43:26,717 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:43:26,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:43:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:43:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 100. [2021-05-21 20:43:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-05-21 20:43:26,728 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-05-21 20:43:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:26,728 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-05-21 20:43:26,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-05-21 20:43:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:43:26,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:26,731 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:26,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:43:26,731 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1756874686, now seen corresponding path program 6 times [2021-05-21 20:43:26,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:26,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280179529] [2021-05-21 20:43:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:26,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:26,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280179529] [2021-05-21 20:43:26,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280179529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:43:26,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:43:26,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:43:26,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502364695] [2021-05-21 20:43:26,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:43:26,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:26,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:43:26,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:43:26,783 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:26,846 INFO L93 Difference]: Finished difference Result 174 states and 483 transitions. [2021-05-21 20:43:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:43:26,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-21 20:43:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:26,847 INFO L225 Difference]: With dead ends: 174 [2021-05-21 20:43:26,847 INFO L226 Difference]: Without dead ends: 170 [2021-05-21 20:43:26,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:43:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-21 20:43:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2021-05-21 20:43:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-05-21 20:43:26,850 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-05-21 20:43:26,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:26,851 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-05-21 20:43:26,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-05-21 20:43:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:26,851 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:26,851 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:26,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 20:43:26,851 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1483038554, now seen corresponding path program 1 times [2021-05-21 20:43:26,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:26,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558185667] [2021-05-21 20:43:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:26,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:26,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558185667] [2021-05-21 20:43:26,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558185667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:26,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062008410] [2021-05-21 20:43:26,890 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) [2021-05-21 20:43:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:26,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:27,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062008410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:27,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:27,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:43:27,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080879033] [2021-05-21 20:43:27,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:27,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:27,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:27,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:27,069 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:27,519 INFO L93 Difference]: Finished difference Result 239 states and 656 transitions. [2021-05-21 20:43:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:43:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:43:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:27,521 INFO L225 Difference]: With dead ends: 239 [2021-05-21 20:43:27,521 INFO L226 Difference]: Without dead ends: 206 [2021-05-21 20:43:27,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:43:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-21 20:43:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 123. [2021-05-21 20:43:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.9836065573770494) internal successors, (364), 122 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 364 transitions. [2021-05-21 20:43:27,528 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 364 transitions. Word has length 15 [2021-05-21 20:43:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:27,529 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 364 transitions. [2021-05-21 20:43:27,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 364 transitions. [2021-05-21 20:43:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:27,529 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:27,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:27,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-21 20:43:27,741 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:27,741 INFO L82 PathProgramCache]: Analyzing trace with hash -180956976, now seen corresponding path program 1 times [2021-05-21 20:43:27,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:27,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658986031] [2021-05-21 20:43:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:27,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:27,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658986031] [2021-05-21 20:43:27,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658986031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:27,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494652378] [2021-05-21 20:43:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:27,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:27,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:27,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494652378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:27,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:27,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:43:27,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512996077] [2021-05-21 20:43:27,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:27,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:27,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:27,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:27,908 INFO L87 Difference]: Start difference. First operand 123 states and 364 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:28,427 INFO L93 Difference]: Finished difference Result 257 states and 669 transitions. [2021-05-21 20:43:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:43:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:28,429 INFO L225 Difference]: With dead ends: 257 [2021-05-21 20:43:28,429 INFO L226 Difference]: Without dead ends: 187 [2021-05-21 20:43:28,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:43:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-21 20:43:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 133. [2021-05-21 20:43:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.9318181818181817) internal successors, (387), 132 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 387 transitions. [2021-05-21 20:43:28,433 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 387 transitions. Word has length 15 [2021-05-21 20:43:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:28,433 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 387 transitions. [2021-05-21 20:43:28,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 387 transitions. [2021-05-21 20:43:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:28,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:28,433 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:28,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:28,649 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:28,650 INFO L82 PathProgramCache]: Analyzing trace with hash 479848854, now seen corresponding path program 1 times [2021-05-21 20:43:28,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:28,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097645770] [2021-05-21 20:43:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:28,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097645770] [2021-05-21 20:43:28,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097645770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272575417] [2021-05-21 20:43:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:28,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:28,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:28,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272575417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:28,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:28,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:28,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670487739] [2021-05-21 20:43:28,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:28,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:28,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:28,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:28,883 INFO L87 Difference]: Start difference. First operand 133 states and 387 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:29,079 INFO L93 Difference]: Finished difference Result 187 states and 522 transitions. [2021-05-21 20:43:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:29,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:29,081 INFO L225 Difference]: With dead ends: 187 [2021-05-21 20:43:29,081 INFO L226 Difference]: Without dead ends: 182 [2021-05-21 20:43:29,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-21 20:43:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2021-05-21 20:43:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.9305555555555554) internal successors, (422), 144 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 422 transitions. [2021-05-21 20:43:29,085 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 422 transitions. Word has length 15 [2021-05-21 20:43:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:29,085 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 422 transitions. [2021-05-21 20:43:29,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 422 transitions. [2021-05-21 20:43:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:29,086 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:29,086 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:29,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 20:43:29,293 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1061667084, now seen corresponding path program 2 times [2021-05-21 20:43:29,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:29,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626847393] [2021-05-21 20:43:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:29,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:29,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626847393] [2021-05-21 20:43:29,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626847393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:29,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727111949] [2021-05-21 20:43:29,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:29,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:29,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:29,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:29,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727111949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:29,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:29,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:29,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422515008] [2021-05-21 20:43:29,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:29,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:29,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:29,486 INFO L87 Difference]: Start difference. First operand 145 states and 422 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:29,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:29,620 INFO L93 Difference]: Finished difference Result 197 states and 554 transitions. [2021-05-21 20:43:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:29,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:29,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:29,623 INFO L225 Difference]: With dead ends: 197 [2021-05-21 20:43:29,623 INFO L226 Difference]: Without dead ends: 192 [2021-05-21 20:43:29,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-21 20:43:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 147. [2021-05-21 20:43:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.952054794520548) internal successors, (431), 146 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 431 transitions. [2021-05-21 20:43:29,627 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 431 transitions. Word has length 15 [2021-05-21 20:43:29,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:29,627 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 431 transitions. [2021-05-21 20:43:29,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 431 transitions. [2021-05-21 20:43:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:29,627 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:29,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:29,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 20:43:29,841 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:29,842 INFO L82 PathProgramCache]: Analyzing trace with hash -667380250, now seen corresponding path program 3 times [2021-05-21 20:43:29,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:29,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010048603] [2021-05-21 20:43:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:29,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:29,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010048603] [2021-05-21 20:43:29,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010048603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:29,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896916555] [2021-05-21 20:43:29,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:29,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:29,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:29,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:29,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896916555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:29,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:29,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:43:29,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065255927] [2021-05-21 20:43:29,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:43:29,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:29,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:43:29,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:43:29,972 INFO L87 Difference]: Start difference. First operand 147 states and 431 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-21 20:43:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:30,089 INFO L93 Difference]: Finished difference Result 209 states and 593 transitions. [2021-05-21 20:43:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:30,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 15 [2021-05-21 20:43:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:30,091 INFO L225 Difference]: With dead ends: 209 [2021-05-21 20:43:30,091 INFO L226 Difference]: Without dead ends: 204 [2021-05-21 20:43:30,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-21 20:43:30,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2021-05-21 20:43:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.9539473684210527) internal successors, (449), 152 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 449 transitions. [2021-05-21 20:43:30,096 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 449 transitions. Word has length 15 [2021-05-21 20:43:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:30,097 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 449 transitions. [2021-05-21 20:43:30,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-21 20:43:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 449 transitions. [2021-05-21 20:43:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:30,097 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:30,097 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:30,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 20:43:30,315 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:30,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1754797532, now seen corresponding path program 4 times [2021-05-21 20:43:30,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:30,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274961254] [2021-05-21 20:43:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:30,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:30,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274961254] [2021-05-21 20:43:30,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274961254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:30,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040631363] [2021-05-21 20:43:30,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:43:30,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:30,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:30,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:30,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:30,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040631363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:30,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:30,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:30,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019342788] [2021-05-21 20:43:30,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:30,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:30,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:30,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:30,500 INFO L87 Difference]: Start difference. First operand 153 states and 449 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:30,722 INFO L93 Difference]: Finished difference Result 276 states and 751 transitions. [2021-05-21 20:43:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:30,724 INFO L225 Difference]: With dead ends: 276 [2021-05-21 20:43:30,724 INFO L226 Difference]: Without dead ends: 271 [2021-05-21 20:43:30,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:30,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-21 20:43:30,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 158. [2021-05-21 20:43:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9872611464968153) internal successors, (469), 157 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:30,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 469 transitions. [2021-05-21 20:43:30,728 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 469 transitions. Word has length 15 [2021-05-21 20:43:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:30,728 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 469 transitions. [2021-05-21 20:43:30,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 469 transitions. [2021-05-21 20:43:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:30,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:30,729 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:30,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:30,941 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:30,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:30,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1958351534, now seen corresponding path program 5 times [2021-05-21 20:43:30,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:30,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250576710] [2021-05-21 20:43:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:31,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:31,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250576710] [2021-05-21 20:43:31,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250576710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:31,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646137887] [2021-05-21 20:43:31,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:31,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:31,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:31,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:31,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:31,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646137887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:31,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:31,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:31,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548920763] [2021-05-21 20:43:31,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:31,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:31,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:31,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:31,151 INFO L87 Difference]: Start difference. First operand 158 states and 469 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:31,353 INFO L93 Difference]: Finished difference Result 276 states and 772 transitions. [2021-05-21 20:43:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:31,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:31,355 INFO L225 Difference]: With dead ends: 276 [2021-05-21 20:43:31,355 INFO L226 Difference]: Without dead ends: 271 [2021-05-21 20:43:31,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:31,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-21 20:43:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 153. [2021-05-21 20:43:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.9539473684210527) internal successors, (449), 152 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 449 transitions. [2021-05-21 20:43:31,359 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 449 transitions. Word has length 15 [2021-05-21 20:43:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:31,359 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 449 transitions. [2021-05-21 20:43:31,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 449 transitions. [2021-05-21 20:43:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:31,360 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:31,360 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:31,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 20:43:31,573 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1013363858, now seen corresponding path program 6 times [2021-05-21 20:43:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:31,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12170397] [2021-05-21 20:43:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:31,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:31,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12170397] [2021-05-21 20:43:31,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12170397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:31,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075561784] [2021-05-21 20:43:31,627 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 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 [2021-05-21 20:43:31,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:43:31,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:43:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:31,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075561784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:31,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:31,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:31,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920253331] [2021-05-21 20:43:31,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:31,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:31,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:31,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:31,748 INFO L87 Difference]: Start difference. First operand 153 states and 449 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:32,395 INFO L93 Difference]: Finished difference Result 275 states and 748 transitions. [2021-05-21 20:43:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:43:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:32,396 INFO L225 Difference]: With dead ends: 275 [2021-05-21 20:43:32,396 INFO L226 Difference]: Without dead ends: 270 [2021-05-21 20:43:32,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 527.3ms TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:43:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-21 20:43:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 153. [2021-05-21 20:43:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.9539473684210527) internal successors, (449), 152 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 449 transitions. [2021-05-21 20:43:32,401 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 449 transitions. Word has length 15 [2021-05-21 20:43:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:32,401 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 449 transitions. [2021-05-21 20:43:32,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 449 transitions. [2021-05-21 20:43:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:32,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:32,401 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:32,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 20:43:32,609 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash 261780050, now seen corresponding path program 7 times [2021-05-21 20:43:32,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:32,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170713700] [2021-05-21 20:43:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:32,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:32,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170713700] [2021-05-21 20:43:32,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170713700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:32,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121374217] [2021-05-21 20:43:32,668 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 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 [2021-05-21 20:43:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:32,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:32,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:32,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121374217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:32,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:32,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:32,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936401621] [2021-05-21 20:43:32,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:32,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:32,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:32,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:32,783 INFO L87 Difference]: Start difference. First operand 153 states and 449 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:33,035 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2021-05-21 20:43:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:33,035 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:33,036 INFO L225 Difference]: With dead ends: 206 [2021-05-21 20:43:33,036 INFO L226 Difference]: Without dead ends: 200 [2021-05-21 20:43:33,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-21 20:43:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 154. [2021-05-21 20:43:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.947712418300654) internal successors, (451), 153 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 451 transitions. [2021-05-21 20:43:33,040 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 451 transitions. Word has length 15 [2021-05-21 20:43:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:33,040 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 451 transitions. [2021-05-21 20:43:33,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 451 transitions. [2021-05-21 20:43:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:33,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:33,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:33,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 20:43:33,261 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash 970590554, now seen corresponding path program 2 times [2021-05-21 20:43:33,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:33,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265210825] [2021-05-21 20:43:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:33,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:33,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265210825] [2021-05-21 20:43:33,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265210825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:33,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935441758] [2021-05-21 20:43:33,301 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 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 [2021-05-21 20:43:33,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:33,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:33,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935441758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:33,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:33,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:43:33,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980505792] [2021-05-21 20:43:33,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:33,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:33,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:33,423 INFO L87 Difference]: Start difference. First operand 154 states and 451 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:33,786 INFO L93 Difference]: Finished difference Result 315 states and 839 transitions. [2021-05-21 20:43:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:43:33,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:33,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:33,788 INFO L225 Difference]: With dead ends: 315 [2021-05-21 20:43:33,788 INFO L226 Difference]: Without dead ends: 273 [2021-05-21 20:43:33,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:43:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-05-21 20:43:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 168. [2021-05-21 20:43:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.0479041916167664) internal successors, (509), 167 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 509 transitions. [2021-05-21 20:43:33,792 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 509 transitions. Word has length 15 [2021-05-21 20:43:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:33,792 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 509 transitions. [2021-05-21 20:43:33,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 509 transitions. [2021-05-21 20:43:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:33,793 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:33,793 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:34,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:34,010 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:34,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:34,011 INFO L82 PathProgramCache]: Analyzing trace with hash 511164902, now seen corresponding path program 8 times [2021-05-21 20:43:34,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:34,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809865802] [2021-05-21 20:43:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:34,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:34,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809865802] [2021-05-21 20:43:34,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809865802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:34,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805056026] [2021-05-21 20:43:34,098 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 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 [2021-05-21 20:43:34,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:34,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:34,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805056026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:34,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:34,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:34,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134498647] [2021-05-21 20:43:34,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:34,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:34,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:34,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:34,216 INFO L87 Difference]: Start difference. First operand 168 states and 509 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:34,432 INFO L93 Difference]: Finished difference Result 259 states and 742 transitions. [2021-05-21 20:43:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:34,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:34,434 INFO L225 Difference]: With dead ends: 259 [2021-05-21 20:43:34,434 INFO L226 Difference]: Without dead ends: 254 [2021-05-21 20:43:34,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-21 20:43:34,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 170. [2021-05-21 20:43:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 3.059171597633136) internal successors, (517), 169 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 517 transitions. [2021-05-21 20:43:34,438 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 517 transitions. Word has length 15 [2021-05-21 20:43:34,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:34,438 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 517 transitions. [2021-05-21 20:43:34,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 517 transitions. [2021-05-21 20:43:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:34,439 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:34,439 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:34,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 20:43:34,649 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1191223272, now seen corresponding path program 2 times [2021-05-21 20:43:34,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:34,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712431235] [2021-05-21 20:43:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:34,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:34,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712431235] [2021-05-21 20:43:34,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712431235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:34,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387990609] [2021-05-21 20:43:34,682 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 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 [2021-05-21 20:43:34,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:34,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:34,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:34,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:34,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387990609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:34,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:34,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:43:34,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113025837] [2021-05-21 20:43:34,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:34,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:34,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:34,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:34,773 INFO L87 Difference]: Start difference. First operand 170 states and 517 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:35,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:35,006 INFO L93 Difference]: Finished difference Result 263 states and 728 transitions. [2021-05-21 20:43:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:43:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:43:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:35,008 INFO L225 Difference]: With dead ends: 263 [2021-05-21 20:43:35,008 INFO L226 Difference]: Without dead ends: 236 [2021-05-21 20:43:35,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:35,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-21 20:43:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 170. [2021-05-21 20:43:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 3.029585798816568) internal successors, (512), 169 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 512 transitions. [2021-05-21 20:43:35,019 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 512 transitions. Word has length 15 [2021-05-21 20:43:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:35,019 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 512 transitions. [2021-05-21 20:43:35,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 512 transitions. [2021-05-21 20:43:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:35,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:35,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:35,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 20:43:35,233 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1872721008, now seen corresponding path program 9 times [2021-05-21 20:43:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:35,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212312572] [2021-05-21 20:43:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:35,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:35,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212312572] [2021-05-21 20:43:35,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212312572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:35,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482473188] [2021-05-21 20:43:35,293 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 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 [2021-05-21 20:43:35,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:35,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:35,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:35,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:35,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482473188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:35,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:35,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:35,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349423862] [2021-05-21 20:43:35,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:35,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:35,414 INFO L87 Difference]: Start difference. First operand 170 states and 512 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:35,641 INFO L93 Difference]: Finished difference Result 230 states and 654 transitions. [2021-05-21 20:43:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:35,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:35,642 INFO L225 Difference]: With dead ends: 230 [2021-05-21 20:43:35,642 INFO L226 Difference]: Without dead ends: 224 [2021-05-21 20:43:35,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:35,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-21 20:43:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 170. [2021-05-21 20:43:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 3.0236686390532546) internal successors, (511), 169 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 511 transitions. [2021-05-21 20:43:35,646 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 511 transitions. Word has length 15 [2021-05-21 20:43:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:35,646 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 511 transitions. [2021-05-21 20:43:35,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 511 transitions. [2021-05-21 20:43:35,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:35,647 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:35,647 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:35,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-21 20:43:35,861 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:35,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1743627284, now seen corresponding path program 3 times [2021-05-21 20:43:35,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:35,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334195249] [2021-05-21 20:43:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:35,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:35,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334195249] [2021-05-21 20:43:35,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334195249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:35,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90703068] [2021-05-21 20:43:35,893 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:35,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:35,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:35,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:35,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90703068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:35,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:35,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:43:35,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735940238] [2021-05-21 20:43:35,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:35,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:35,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:35,989 INFO L87 Difference]: Start difference. First operand 170 states and 511 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:36,309 INFO L93 Difference]: Finished difference Result 284 states and 758 transitions. [2021-05-21 20:43:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:43:36,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:36,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:36,310 INFO L225 Difference]: With dead ends: 284 [2021-05-21 20:43:36,310 INFO L226 Difference]: Without dead ends: 247 [2021-05-21 20:43:36,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:43:36,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-21 20:43:36,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2021-05-21 20:43:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0) internal successors, (474), 158 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 474 transitions. [2021-05-21 20:43:36,314 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 474 transitions. Word has length 15 [2021-05-21 20:43:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:36,315 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 474 transitions. [2021-05-21 20:43:36,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 474 transitions. [2021-05-21 20:43:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:36,315 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:36,315 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:36,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:36,525 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:36,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:36,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1421782062, now seen corresponding path program 10 times [2021-05-21 20:43:36,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:36,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668574722] [2021-05-21 20:43:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:36,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:36,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668574722] [2021-05-21 20:43:36,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668574722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:36,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102006363] [2021-05-21 20:43:36,561 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 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 [2021-05-21 20:43:36,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:36,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:36,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:36,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:36,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102006363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:36,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:36,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:36,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867298427] [2021-05-21 20:43:36,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:36,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:36,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:36,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:36,649 INFO L87 Difference]: Start difference. First operand 159 states and 474 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:36,768 INFO L93 Difference]: Finished difference Result 254 states and 734 transitions. [2021-05-21 20:43:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:43:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:36,770 INFO L225 Difference]: With dead ends: 254 [2021-05-21 20:43:36,770 INFO L226 Difference]: Without dead ends: 249 [2021-05-21 20:43:36,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-21 20:43:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 161. [2021-05-21 20:43:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.0) internal successors, (480), 160 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 480 transitions. [2021-05-21 20:43:36,774 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 480 transitions. Word has length 15 [2021-05-21 20:43:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:36,774 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 480 transitions. [2021-05-21 20:43:36,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:36,774 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 480 transitions. [2021-05-21 20:43:36,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:36,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:36,774 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:36,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:36,980 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash 4818636, now seen corresponding path program 11 times [2021-05-21 20:43:36,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:36,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491318315] [2021-05-21 20:43:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:37,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491318315] [2021-05-21 20:43:37,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491318315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666096333] [2021-05-21 20:43:37,021 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:37,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:37,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:37,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:37,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:37,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666096333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:37,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:37,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:43:37,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389527345] [2021-05-21 20:43:37,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:37,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:37,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:37,130 INFO L87 Difference]: Start difference. First operand 161 states and 480 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:37,231 INFO L93 Difference]: Finished difference Result 244 states and 694 transitions. [2021-05-21 20:43:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:43:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:37,232 INFO L225 Difference]: With dead ends: 244 [2021-05-21 20:43:37,232 INFO L226 Difference]: Without dead ends: 239 [2021-05-21 20:43:37,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-21 20:43:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2021-05-21 20:43:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.0123456790123457) internal successors, (488), 162 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 488 transitions. [2021-05-21 20:43:37,236 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 488 transitions. Word has length 15 [2021-05-21 20:43:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:37,236 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 488 transitions. [2021-05-21 20:43:37,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 488 transitions. [2021-05-21 20:43:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:37,237 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:37,237 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:37,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:37,441 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1366374742, now seen corresponding path program 12 times [2021-05-21 20:43:37,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:37,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652146884] [2021-05-21 20:43:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:37,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:37,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652146884] [2021-05-21 20:43:37,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652146884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:37,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230402069] [2021-05-21 20:43:37,480 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 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 [2021-05-21 20:43:37,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:43:37,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:37,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230402069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:37,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:37,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:43:37,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477782817] [2021-05-21 20:43:37,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:37,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:37,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:37,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:37,592 INFO L87 Difference]: Start difference. First operand 163 states and 488 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:37,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:37,696 INFO L93 Difference]: Finished difference Result 217 states and 622 transitions. [2021-05-21 20:43:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:37,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:43:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:37,697 INFO L225 Difference]: With dead ends: 217 [2021-05-21 20:43:37,697 INFO L226 Difference]: Without dead ends: 211 [2021-05-21 20:43:37,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:37,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-21 20:43:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 161. [2021-05-21 20:43:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.0) internal successors, (480), 160 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 480 transitions. [2021-05-21 20:43:37,701 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 480 transitions. Word has length 15 [2021-05-21 20:43:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:37,701 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 480 transitions. [2021-05-21 20:43:37,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 480 transitions. [2021-05-21 20:43:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:37,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:37,701 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:37,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:37,917 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:37,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1908842768, now seen corresponding path program 3 times [2021-05-21 20:43:37,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:37,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586852832] [2021-05-21 20:43:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:37,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:37,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586852832] [2021-05-21 20:43:37,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586852832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:37,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259117909] [2021-05-21 20:43:37,945 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 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 [2021-05-21 20:43:37,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:37,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:38,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259117909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:38,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:38,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-21 20:43:38,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371748565] [2021-05-21 20:43:38,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:38,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:38,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:38,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:38,033 INFO L87 Difference]: Start difference. First operand 161 states and 480 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:38,246 INFO L93 Difference]: Finished difference Result 274 states and 770 transitions. [2021-05-21 20:43:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:43:38,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:38,247 INFO L225 Difference]: With dead ends: 274 [2021-05-21 20:43:38,247 INFO L226 Difference]: Without dead ends: 221 [2021-05-21 20:43:38,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:43:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-21 20:43:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 158. [2021-05-21 20:43:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9872611464968153) internal successors, (469), 157 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 469 transitions. [2021-05-21 20:43:38,251 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 469 transitions. Word has length 15 [2021-05-21 20:43:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:38,251 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 469 transitions. [2021-05-21 20:43:38,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 469 transitions. [2021-05-21 20:43:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:38,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:38,251 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:38,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-21 20:43:38,465 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1057034826, now seen corresponding path program 13 times [2021-05-21 20:43:38,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:38,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740924499] [2021-05-21 20:43:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:38,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:38,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740924499] [2021-05-21 20:43:38,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740924499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:38,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936935523] [2021-05-21 20:43:38,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:38,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:38,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:38,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936935523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:38,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:38,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:38,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839696164] [2021-05-21 20:43:38,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:38,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:38,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:38,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:38,645 INFO L87 Difference]: Start difference. First operand 158 states and 469 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:38,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:38,840 INFO L93 Difference]: Finished difference Result 270 states and 738 transitions. [2021-05-21 20:43:38,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:38,841 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:38,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:38,842 INFO L225 Difference]: With dead ends: 270 [2021-05-21 20:43:38,842 INFO L226 Difference]: Without dead ends: 265 [2021-05-21 20:43:38,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:38,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-21 20:43:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 163. [2021-05-21 20:43:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.0185185185185186) internal successors, (489), 162 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 489 transitions. [2021-05-21 20:43:38,846 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 489 transitions. Word has length 15 [2021-05-21 20:43:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:38,846 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 489 transitions. [2021-05-21 20:43:38,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 489 transitions. [2021-05-21 20:43:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:38,846 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:38,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:39,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-21 20:43:39,061 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:39,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:39,061 INFO L82 PathProgramCache]: Analyzing trace with hash -475216596, now seen corresponding path program 14 times [2021-05-21 20:43:39,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:39,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704182408] [2021-05-21 20:43:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:39,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:39,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704182408] [2021-05-21 20:43:39,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704182408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:39,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848651761] [2021-05-21 20:43:39,113 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 [2021-05-21 20:43:39,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:39,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:39,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:39,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:39,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848651761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:39,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:39,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:39,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801574855] [2021-05-21 20:43:39,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:39,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:39,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:39,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:39,233 INFO L87 Difference]: Start difference. First operand 163 states and 489 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:39,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:39,421 INFO L93 Difference]: Finished difference Result 280 states and 770 transitions. [2021-05-21 20:43:39,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:39,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:39,422 INFO L225 Difference]: With dead ends: 280 [2021-05-21 20:43:39,422 INFO L226 Difference]: Without dead ends: 275 [2021-05-21 20:43:39,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-05-21 20:43:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 158. [2021-05-21 20:43:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9872611464968153) internal successors, (469), 157 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 469 transitions. [2021-05-21 20:43:39,426 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 469 transitions. Word has length 15 [2021-05-21 20:43:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:39,426 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 469 transitions. [2021-05-21 20:43:39,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 469 transitions. [2021-05-21 20:43:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:39,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:39,426 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:39,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-05-21 20:43:39,641 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:39,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1798468500, now seen corresponding path program 15 times [2021-05-21 20:43:39,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:39,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424640067] [2021-05-21 20:43:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:39,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:39,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424640067] [2021-05-21 20:43:39,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424640067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:39,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353591704] [2021-05-21 20:43:39,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:39,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:39,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:39,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:39,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353591704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:39,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:39,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:39,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614794540] [2021-05-21 20:43:39,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:39,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:39,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:39,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:39,801 INFO L87 Difference]: Start difference. First operand 158 states and 469 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:40,073 INFO L93 Difference]: Finished difference Result 305 states and 819 transitions. [2021-05-21 20:43:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:40,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:40,075 INFO L225 Difference]: With dead ends: 305 [2021-05-21 20:43:40,075 INFO L226 Difference]: Without dead ends: 300 [2021-05-21 20:43:40,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-21 20:43:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 160. [2021-05-21 20:43:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.9748427672955975) internal successors, (473), 159 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 473 transitions. [2021-05-21 20:43:40,078 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 473 transitions. Word has length 15 [2021-05-21 20:43:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:40,079 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 473 transitions. [2021-05-21 20:43:40,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 473 transitions. [2021-05-21 20:43:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:40,079 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:40,079 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:40,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-21 20:43:40,295 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:40,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:40,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1744914988, now seen corresponding path program 16 times [2021-05-21 20:43:40,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:40,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640564527] [2021-05-21 20:43:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:40,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:40,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640564527] [2021-05-21 20:43:40,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640564527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:40,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100464563] [2021-05-21 20:43:40,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:40,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:40,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:40,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:40,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:40,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100464563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:40,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:40,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:40,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679633304] [2021-05-21 20:43:40,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:40,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:40,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:40,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:40,465 INFO L87 Difference]: Start difference. First operand 160 states and 473 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:40,748 INFO L93 Difference]: Finished difference Result 284 states and 780 transitions. [2021-05-21 20:43:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:40,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:40,750 INFO L225 Difference]: With dead ends: 284 [2021-05-21 20:43:40,750 INFO L226 Difference]: Without dead ends: 278 [2021-05-21 20:43:40,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-21 20:43:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 158. [2021-05-21 20:43:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9872611464968153) internal successors, (469), 157 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 469 transitions. [2021-05-21 20:43:40,753 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 469 transitions. Word has length 15 [2021-05-21 20:43:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:40,753 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 469 transitions. [2021-05-21 20:43:40,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 469 transitions. [2021-05-21 20:43:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:40,754 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:40,754 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:40,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:40,961 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1994299840, now seen corresponding path program 17 times [2021-05-21 20:43:40,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:40,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160630807] [2021-05-21 20:43:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:41,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:41,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160630807] [2021-05-21 20:43:41,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160630807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647964587] [2021-05-21 20:43:41,015 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 [2021-05-21 20:43:41,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:41,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:41,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:41,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:41,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647964587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:41,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:41,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:41,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723638488] [2021-05-21 20:43:41,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:41,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:41,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:41,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:41,134 INFO L87 Difference]: Start difference. First operand 158 states and 469 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:41,345 INFO L93 Difference]: Finished difference Result 306 states and 841 transitions. [2021-05-21 20:43:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:41,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:41,346 INFO L225 Difference]: With dead ends: 306 [2021-05-21 20:43:41,346 INFO L226 Difference]: Without dead ends: 301 [2021-05-21 20:43:41,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-05-21 20:43:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 159. [2021-05-21 20:43:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.9873417721518987) internal successors, (472), 158 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 472 transitions. [2021-05-21 20:43:41,350 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 472 transitions. Word has length 15 [2021-05-21 20:43:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:41,350 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 472 transitions. [2021-05-21 20:43:41,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 472 transitions. [2021-05-21 20:43:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:41,350 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:41,351 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:41,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:41,565 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:41,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1620609086, now seen corresponding path program 4 times [2021-05-21 20:43:41,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:41,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408862239] [2021-05-21 20:43:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:41,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:41,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408862239] [2021-05-21 20:43:41,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408862239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:41,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770417941] [2021-05-21 20:43:41,598 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 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 [2021-05-21 20:43:41,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:41,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:41,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:41,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:41,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770417941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:41,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:41,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-21 20:43:41,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281620269] [2021-05-21 20:43:41,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:41,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:41,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:41,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:41,670 INFO L87 Difference]: Start difference. First operand 159 states and 472 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:41,889 INFO L93 Difference]: Finished difference Result 251 states and 682 transitions. [2021-05-21 20:43:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:43:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:41,890 INFO L225 Difference]: With dead ends: 251 [2021-05-21 20:43:41,891 INFO L226 Difference]: Without dead ends: 229 [2021-05-21 20:43:41,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:43:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-21 20:43:41,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 155. [2021-05-21 20:43:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.9415584415584415) internal successors, (453), 154 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 453 transitions. [2021-05-21 20:43:41,894 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 453 transitions. Word has length 15 [2021-05-21 20:43:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:41,894 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 453 transitions. [2021-05-21 20:43:41,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 453 transitions. [2021-05-21 20:43:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:41,895 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:41,895 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:42,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:42,095 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash -939111350, now seen corresponding path program 18 times [2021-05-21 20:43:42,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:42,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78136595] [2021-05-21 20:43:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:42,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:42,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78136595] [2021-05-21 20:43:42,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78136595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:42,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110405719] [2021-05-21 20:43:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:42,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:43:42,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:42,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:42,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:42,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110405719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:42,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:42,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:42,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412764248] [2021-05-21 20:43:42,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:42,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:42,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:42,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:42,283 INFO L87 Difference]: Start difference. First operand 155 states and 453 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:42,538 INFO L93 Difference]: Finished difference Result 284 states and 778 transitions. [2021-05-21 20:43:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:42,538 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:42,539 INFO L225 Difference]: With dead ends: 284 [2021-05-21 20:43:42,539 INFO L226 Difference]: Without dead ends: 278 [2021-05-21 20:43:42,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-21 20:43:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 151. [2021-05-21 20:43:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.9133333333333336) internal successors, (437), 150 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 437 transitions. [2021-05-21 20:43:42,543 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 437 transitions. Word has length 15 [2021-05-21 20:43:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:42,543 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 437 transitions. [2021-05-21 20:43:42,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 437 transitions. [2021-05-21 20:43:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:42,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:42,544 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:42,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 20:43:42,744 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:42,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:42,744 INFO L82 PathProgramCache]: Analyzing trace with hash 738121340, now seen corresponding path program 5 times [2021-05-21 20:43:42,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:42,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630742607] [2021-05-21 20:43:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:42,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:42,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630742607] [2021-05-21 20:43:42,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630742607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:42,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606176102] [2021-05-21 20:43:42,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:42,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:42,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:43:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:42,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606176102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:42,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:42,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:43:42,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683076459] [2021-05-21 20:43:42,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:43:42,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:42,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:43:42,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:43:42,841 INFO L87 Difference]: Start difference. First operand 151 states and 437 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-21 20:43:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:42,944 INFO L93 Difference]: Finished difference Result 221 states and 607 transitions. [2021-05-21 20:43:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:42,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 15 [2021-05-21 20:43:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:42,945 INFO L225 Difference]: With dead ends: 221 [2021-05-21 20:43:42,945 INFO L226 Difference]: Without dead ends: 203 [2021-05-21 20:43:42,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-21 20:43:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 133. [2021-05-21 20:43:42,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.9393939393939394) internal successors, (388), 132 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 388 transitions. [2021-05-21 20:43:42,948 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 388 transitions. Word has length 15 [2021-05-21 20:43:42,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:42,948 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 388 transitions. [2021-05-21 20:43:42,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-21 20:43:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 388 transitions. [2021-05-21 20:43:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:42,948 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:42,948 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:43,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-21 20:43:43,161 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash -338576526, now seen corresponding path program 6 times [2021-05-21 20:43:43,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:43,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471055619] [2021-05-21 20:43:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:43,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:43,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471055619] [2021-05-21 20:43:43,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471055619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:43,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983260705] [2021-05-21 20:43:43,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:43,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:43:43,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:43,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:43,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:43,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983260705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:43,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:43,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-21 20:43:43,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636377469] [2021-05-21 20:43:43,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:43,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:43,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:43,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:43,257 INFO L87 Difference]: Start difference. First operand 133 states and 388 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:43,451 INFO L93 Difference]: Finished difference Result 237 states and 658 transitions. [2021-05-21 20:43:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:43:43,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:43,452 INFO L225 Difference]: With dead ends: 237 [2021-05-21 20:43:43,452 INFO L226 Difference]: Without dead ends: 215 [2021-05-21 20:43:43,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:43:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-21 20:43:43,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 135. [2021-05-21 20:43:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.955223880597015) internal successors, (396), 134 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:43,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 396 transitions. [2021-05-21 20:43:43,455 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 396 transitions. Word has length 15 [2021-05-21 20:43:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:43,455 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 396 transitions. [2021-05-21 20:43:43,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 396 transitions. [2021-05-21 20:43:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:43,456 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:43,456 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:43,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 20:43:43,671 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:43,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1210723178, now seen corresponding path program 19 times [2021-05-21 20:43:43,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:43,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790025631] [2021-05-21 20:43:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:43,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:43,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790025631] [2021-05-21 20:43:43,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790025631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:43,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573472063] [2021-05-21 20:43:43,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:43,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:43,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:43,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573472063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:43,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:43,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:43,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162516513] [2021-05-21 20:43:43,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:43,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:43,814 INFO L87 Difference]: Start difference. First operand 135 states and 396 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:43,998 INFO L93 Difference]: Finished difference Result 203 states and 539 transitions. [2021-05-21 20:43:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:43,998 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:43,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:43,999 INFO L225 Difference]: With dead ends: 203 [2021-05-21 20:43:43,999 INFO L226 Difference]: Without dead ends: 198 [2021-05-21 20:43:43,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-21 20:43:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 137. [2021-05-21 20:43:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.9411764705882355) internal successors, (400), 136 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 400 transitions. [2021-05-21 20:43:44,002 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 400 transitions. Word has length 15 [2021-05-21 20:43:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:44,002 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 400 transitions. [2021-05-21 20:43:44,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 400 transitions. [2021-05-21 20:43:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:44,002 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:44,002 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:44,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:44,215 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:44,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1962306986, now seen corresponding path program 20 times [2021-05-21 20:43:44,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:44,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526228880] [2021-05-21 20:43:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:44,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:44,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526228880] [2021-05-21 20:43:44,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526228880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:44,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524922314] [2021-05-21 20:43:44,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:44,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:44,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:44,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:44,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:44,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524922314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:44,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:44,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:44,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173148165] [2021-05-21 20:43:44,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:44,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:44,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:44,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:44,376 INFO L87 Difference]: Start difference. First operand 137 states and 400 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:44,610 INFO L93 Difference]: Finished difference Result 202 states and 540 transitions. [2021-05-21 20:43:44,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:44,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:44,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:44,611 INFO L225 Difference]: With dead ends: 202 [2021-05-21 20:43:44,611 INFO L226 Difference]: Without dead ends: 196 [2021-05-21 20:43:44,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:43:44,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-21 20:43:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 135. [2021-05-21 20:43:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.955223880597015) internal successors, (396), 134 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 396 transitions. [2021-05-21 20:43:44,614 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 396 transitions. Word has length 15 [2021-05-21 20:43:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:44,614 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 396 transitions. [2021-05-21 20:43:44,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 396 transitions. [2021-05-21 20:43:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:44,614 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:44,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:44,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-21 20:43:44,830 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1226951760, now seen corresponding path program 4 times [2021-05-21 20:43:44,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:44,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061574993] [2021-05-21 20:43:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:44,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:44,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061574993] [2021-05-21 20:43:44,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061574993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:44,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672201511] [2021-05-21 20:43:44,859 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 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 [2021-05-21 20:43:44,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:44,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:43:44,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:44,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672201511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:44,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:44,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:44,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620248940] [2021-05-21 20:43:44,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:44,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:44,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:44,947 INFO L87 Difference]: Start difference. First operand 135 states and 396 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:45,051 INFO L93 Difference]: Finished difference Result 205 states and 542 transitions. [2021-05-21 20:43:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:45,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:43:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:45,052 INFO L225 Difference]: With dead ends: 205 [2021-05-21 20:43:45,052 INFO L226 Difference]: Without dead ends: 195 [2021-05-21 20:43:45,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:43:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-21 20:43:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 141. [2021-05-21 20:43:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.9357142857142855) internal successors, (411), 140 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 411 transitions. [2021-05-21 20:43:45,055 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 411 transitions. Word has length 15 [2021-05-21 20:43:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:45,055 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 411 transitions. [2021-05-21 20:43:45,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 411 transitions. [2021-05-21 20:43:45,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:45,056 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:45,056 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:45,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:45,271 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:45,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:45,271 INFO L82 PathProgramCache]: Analyzing trace with hash -886595830, now seen corresponding path program 21 times [2021-05-21 20:43:45,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:45,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559608205] [2021-05-21 20:43:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:45,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:45,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559608205] [2021-05-21 20:43:45,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559608205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:45,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75879404] [2021-05-21 20:43:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:45,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:45,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:45,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:45,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75879404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:45,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:45,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:43:45,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596152559] [2021-05-21 20:43:45,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:43:45,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:45,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:43:45,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:43:45,416 INFO L87 Difference]: Start difference. First operand 141 states and 411 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2021-05-21 20:43:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:45,588 INFO L93 Difference]: Finished difference Result 181 states and 502 transitions. [2021-05-21 20:43:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:45,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 15 [2021-05-21 20:43:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:45,589 INFO L225 Difference]: With dead ends: 181 [2021-05-21 20:43:45,589 INFO L226 Difference]: Without dead ends: 174 [2021-05-21 20:43:45,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:43:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-21 20:43:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 141. [2021-05-21 20:43:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.9285714285714284) internal successors, (410), 140 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 410 transitions. [2021-05-21 20:43:45,591 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 410 transitions. Word has length 15 [2021-05-21 20:43:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:45,592 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 410 transitions. [2021-05-21 20:43:45,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2021-05-21 20:43:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 410 transitions. [2021-05-21 20:43:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:45,592 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:45,592 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:45,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-21 20:43:45,808 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:45,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:45,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1651983020, now seen corresponding path program 5 times [2021-05-21 20:43:45,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:45,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452451732] [2021-05-21 20:43:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:45,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:45,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452451732] [2021-05-21 20:43:45,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452451732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:45,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291413840] [2021-05-21 20:43:45,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:45,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:45,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:45,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:43:45,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:45,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291413840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:45,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:45,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:45,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166089136] [2021-05-21 20:43:45,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:45,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:45,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:45,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:45,901 INFO L87 Difference]: Start difference. First operand 141 states and 410 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:46,012 INFO L93 Difference]: Finished difference Result 190 states and 512 transitions. [2021-05-21 20:43:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:46,012 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:43:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:46,013 INFO L225 Difference]: With dead ends: 190 [2021-05-21 20:43:46,013 INFO L226 Difference]: Without dead ends: 183 [2021-05-21 20:43:46,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:43:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-21 20:43:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-05-21 20:43:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.948148148148148) internal successors, (398), 135 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) [2021-05-21 20:43:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 398 transitions. [2021-05-21 20:43:46,033 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 398 transitions. Word has length 15 [2021-05-21 20:43:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:46,034 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 398 transitions. [2021-05-21 20:43:46,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 398 transitions. [2021-05-21 20:43:46,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:46,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:46,034 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:46,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-05-21 20:43:46,237 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1441032960, now seen corresponding path program 6 times [2021-05-21 20:43:46,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:46,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054994660] [2021-05-21 20:43:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:46,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:46,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054994660] [2021-05-21 20:43:46,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054994660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:46,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320267845] [2021-05-21 20:43:46,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:46,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:43:46,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:46,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:46,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320267845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:46,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:46,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:43:46,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236471140] [2021-05-21 20:43:46,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:46,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:46,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:46,363 INFO L87 Difference]: Start difference. First operand 136 states and 398 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:46,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:46,662 INFO L93 Difference]: Finished difference Result 214 states and 572 transitions. [2021-05-21 20:43:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:43:46,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:46,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:46,663 INFO L225 Difference]: With dead ends: 214 [2021-05-21 20:43:46,663 INFO L226 Difference]: Without dead ends: 189 [2021-05-21 20:43:46,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:43:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-21 20:43:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 137. [2021-05-21 20:43:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8970588235294117) internal successors, (394), 136 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 394 transitions. [2021-05-21 20:43:46,666 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 394 transitions. Word has length 15 [2021-05-21 20:43:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:46,666 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 394 transitions. [2021-05-21 20:43:46,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:46,666 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 394 transitions. [2021-05-21 20:43:46,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:46,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:46,666 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:46,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-21 20:43:46,877 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:46,877 INFO L82 PathProgramCache]: Analyzing trace with hash 981607308, now seen corresponding path program 22 times [2021-05-21 20:43:46,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:46,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578292783] [2021-05-21 20:43:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:46,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:46,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578292783] [2021-05-21 20:43:46,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578292783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:46,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143175594] [2021-05-21 20:43:46,932 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 [2021-05-21 20:43:46,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:46,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:46,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:46,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:47,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143175594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:47,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:47,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:47,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026895009] [2021-05-21 20:43:47,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:47,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:47,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:47,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:47,052 INFO L87 Difference]: Start difference. First operand 137 states and 394 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:47,250 INFO L93 Difference]: Finished difference Result 214 states and 591 transitions. [2021-05-21 20:43:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:47,251 INFO L225 Difference]: With dead ends: 214 [2021-05-21 20:43:47,251 INFO L226 Difference]: Without dead ends: 209 [2021-05-21 20:43:47,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:43:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-21 20:43:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 141. [2021-05-21 20:43:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.9285714285714284) internal successors, (410), 140 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 410 transitions. [2021-05-21 20:43:47,254 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 410 transitions. Word has length 15 [2021-05-21 20:43:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:47,254 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 410 transitions. [2021-05-21 20:43:47,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 410 transitions. [2021-05-21 20:43:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:47,254 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:47,254 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:47,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-21 20:43:47,455 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:47,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1951803882, now seen corresponding path program 23 times [2021-05-21 20:43:47,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:47,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929214002] [2021-05-21 20:43:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:47,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929214002] [2021-05-21 20:43:47,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929214002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:47,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145250503] [2021-05-21 20:43:47,502 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 [2021-05-21 20:43:47,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:47,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:47,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:47,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:47,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145250503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:47,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:47,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:43:47,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616537844] [2021-05-21 20:43:47,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:43:47,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:47,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:43:47,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:47,622 INFO L87 Difference]: Start difference. First operand 141 states and 410 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:47,839 INFO L93 Difference]: Finished difference Result 223 states and 605 transitions. [2021-05-21 20:43:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 15 [2021-05-21 20:43:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:47,843 INFO L225 Difference]: With dead ends: 223 [2021-05-21 20:43:47,843 INFO L226 Difference]: Without dead ends: 217 [2021-05-21 20:43:47,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:43:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-21 20:43:47,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 140. [2021-05-21 20:43:47,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.9280575539568345) internal successors, (407), 139 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 407 transitions. [2021-05-21 20:43:47,846 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 407 transitions. Word has length 15 [2021-05-21 20:43:47,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:47,846 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 407 transitions. [2021-05-21 20:43:47,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-05-21 20:43:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 407 transitions. [2021-05-21 20:43:47,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:47,846 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:47,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:48,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:48,053 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1273184878, now seen corresponding path program 7 times [2021-05-21 20:43:48,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:48,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237604892] [2021-05-21 20:43:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:48,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:48,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237604892] [2021-05-21 20:43:48,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237604892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:48,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297193742] [2021-05-21 20:43:48,083 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 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 [2021-05-21 20:43:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:48,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:48,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:48,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297193742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:48,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:48,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:43:48,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884120428] [2021-05-21 20:43:48,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:48,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:48,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:48,158 INFO L87 Difference]: Start difference. First operand 140 states and 407 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:48,420 INFO L93 Difference]: Finished difference Result 227 states and 607 transitions. [2021-05-21 20:43:48,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:43:48,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:48,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:48,421 INFO L225 Difference]: With dead ends: 227 [2021-05-21 20:43:48,421 INFO L226 Difference]: Without dead ends: 201 [2021-05-21 20:43:48,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:43:48,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-21 20:43:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 135. [2021-05-21 20:43:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8805970149253732) internal successors, (386), 134 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 386 transitions. [2021-05-21 20:43:48,423 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 386 transitions. Word has length 15 [2021-05-21 20:43:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:48,424 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 386 transitions. [2021-05-21 20:43:48,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 386 transitions. [2021-05-21 20:43:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:48,424 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:48,424 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:48,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-21 20:43:48,637 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1807933612, now seen corresponding path program 24 times [2021-05-21 20:43:48,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:48,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260169758] [2021-05-21 20:43:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:48,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:48,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260169758] [2021-05-21 20:43:48,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260169758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:48,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88168876] [2021-05-21 20:43:48,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:48,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:43:48,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:48,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:48,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:48,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88168876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:48,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:48,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:43:48,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207274586] [2021-05-21 20:43:48,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:43:48,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:48,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:43:48,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:43:48,778 INFO L87 Difference]: Start difference. First operand 135 states and 386 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2021-05-21 20:43:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:48,928 INFO L93 Difference]: Finished difference Result 190 states and 521 transitions. [2021-05-21 20:43:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 15 [2021-05-21 20:43:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:48,929 INFO L225 Difference]: With dead ends: 190 [2021-05-21 20:43:48,929 INFO L226 Difference]: Without dead ends: 183 [2021-05-21 20:43:48,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-21 20:43:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-05-21 20:43:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8666666666666667) internal successors, (387), 135 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 387 transitions. [2021-05-21 20:43:48,932 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 387 transitions. Word has length 15 [2021-05-21 20:43:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:48,932 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 387 transitions. [2021-05-21 20:43:48,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2021-05-21 20:43:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 387 transitions. [2021-05-21 20:43:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:48,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:48,933 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:49,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:49,145 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:49,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1042546422, now seen corresponding path program 8 times [2021-05-21 20:43:49,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:49,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147485694] [2021-05-21 20:43:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:49,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:49,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147485694] [2021-05-21 20:43:49,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147485694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:49,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578753472] [2021-05-21 20:43:49,169 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 [2021-05-21 20:43:49,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:49,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:49,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:49,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:49,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578753472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:49,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:49,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:43:49,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140462990] [2021-05-21 20:43:49,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:49,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:49,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:49,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:49,266 INFO L87 Difference]: Start difference. First operand 136 states and 387 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:49,600 INFO L93 Difference]: Finished difference Result 269 states and 705 transitions. [2021-05-21 20:43:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:43:49,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:43:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:49,601 INFO L225 Difference]: With dead ends: 269 [2021-05-21 20:43:49,601 INFO L226 Difference]: Without dead ends: 254 [2021-05-21 20:43:49,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:43:49,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-21 20:43:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 111. [2021-05-21 20:43:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.8727272727272726) internal successors, (316), 110 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 316 transitions. [2021-05-21 20:43:49,604 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 316 transitions. Word has length 15 [2021-05-21 20:43:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:49,604 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 316 transitions. [2021-05-21 20:43:49,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 316 transitions. [2021-05-21 20:43:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:49,604 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:49,604 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:49,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-21 20:43:49,821 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:49,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1544487814, now seen corresponding path program 25 times [2021-05-21 20:43:49,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:49,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385060143] [2021-05-21 20:43:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:49,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:49,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385060143] [2021-05-21 20:43:49,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385060143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:49,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545694295] [2021-05-21 20:43:49,860 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 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 [2021-05-21 20:43:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:49,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:49,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545694295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:49,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:49,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:43:49,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537397158] [2021-05-21 20:43:49,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:43:49,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:43:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:43:49,943 INFO L87 Difference]: Start difference. First operand 111 states and 316 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:50,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:50,073 INFO L93 Difference]: Finished difference Result 195 states and 547 transitions. [2021-05-21 20:43:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:50,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:50,074 INFO L225 Difference]: With dead ends: 195 [2021-05-21 20:43:50,074 INFO L226 Difference]: Without dead ends: 190 [2021-05-21 20:43:50,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:43:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-21 20:43:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 115. [2021-05-21 20:43:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.8771929824561404) internal successors, (328), 114 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 328 transitions. [2021-05-21 20:43:50,076 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 328 transitions. Word has length 15 [2021-05-21 20:43:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:50,077 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 328 transitions. [2021-05-21 20:43:50,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:50,077 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 328 transitions. [2021-05-21 20:43:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:50,077 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:50,077 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:50,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:50,289 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:50,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1323878784, now seen corresponding path program 26 times [2021-05-21 20:43:50,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:50,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696678753] [2021-05-21 20:43:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:50,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:50,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696678753] [2021-05-21 20:43:50,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696678753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:50,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135707440] [2021-05-21 20:43:50,335 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 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 [2021-05-21 20:43:50,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:50,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:50,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:50,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:50,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135707440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:50,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:50,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:43:50,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247430683] [2021-05-21 20:43:50,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:43:50,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:50,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:43:50,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:43:50,436 INFO L87 Difference]: Start difference. First operand 115 states and 328 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:50,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:50,638 INFO L93 Difference]: Finished difference Result 234 states and 644 transitions. [2021-05-21 20:43:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:50,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:50,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:50,639 INFO L225 Difference]: With dead ends: 234 [2021-05-21 20:43:50,639 INFO L226 Difference]: Without dead ends: 229 [2021-05-21 20:43:50,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:43:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-21 20:43:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 117. [2021-05-21 20:43:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.896551724137931) internal successors, (336), 116 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 336 transitions. [2021-05-21 20:43:50,642 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 336 transitions. Word has length 15 [2021-05-21 20:43:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:50,642 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 336 transitions. [2021-05-21 20:43:50,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 336 transitions. [2021-05-21 20:43:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:50,642 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:50,642 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:50,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:50,858 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:50,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:50,858 INFO L82 PathProgramCache]: Analyzing trace with hash 37677322, now seen corresponding path program 27 times [2021-05-21 20:43:50,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:50,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286556225] [2021-05-21 20:43:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:50,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:50,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286556225] [2021-05-21 20:43:50,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286556225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:50,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230501845] [2021-05-21 20:43:50,902 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 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 [2021-05-21 20:43:50,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:50,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:50,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:50,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:50,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230501845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:50,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:50,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:43:50,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018594553] [2021-05-21 20:43:50,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:43:50,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:50,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:43:50,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:43:50,992 INFO L87 Difference]: Start difference. First operand 117 states and 336 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:51,233 INFO L93 Difference]: Finished difference Result 207 states and 572 transitions. [2021-05-21 20:43:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:51,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:51,234 INFO L225 Difference]: With dead ends: 207 [2021-05-21 20:43:51,234 INFO L226 Difference]: Without dead ends: 201 [2021-05-21 20:43:51,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:43:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-21 20:43:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 113. [2021-05-21 20:43:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.875) internal successors, (322), 112 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 322 transitions. [2021-05-21 20:43:51,237 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 322 transitions. Word has length 15 [2021-05-21 20:43:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:51,237 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 322 transitions. [2021-05-21 20:43:51,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 322 transitions. [2021-05-21 20:43:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:51,237 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:51,237 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:51,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-21 20:43:51,453 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:51,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1830225050, now seen corresponding path program 28 times [2021-05-21 20:43:51,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:51,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601722466] [2021-05-21 20:43:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:51,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:51,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601722466] [2021-05-21 20:43:51,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601722466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:51,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822769798] [2021-05-21 20:43:51,500 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 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 [2021-05-21 20:43:51,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:51,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:51,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822769798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:51,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:51,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:43:51,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875029155] [2021-05-21 20:43:51,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:43:51,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:51,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:43:51,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:43:51,595 INFO L87 Difference]: Start difference. First operand 113 states and 322 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:51,779 INFO L93 Difference]: Finished difference Result 185 states and 511 transitions. [2021-05-21 20:43:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:51,780 INFO L225 Difference]: With dead ends: 185 [2021-05-21 20:43:51,780 INFO L226 Difference]: Without dead ends: 180 [2021-05-21 20:43:51,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-21 20:43:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 117. [2021-05-21 20:43:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.913793103448276) internal successors, (338), 116 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 338 transitions. [2021-05-21 20:43:51,782 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 338 transitions. Word has length 15 [2021-05-21 20:43:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:51,782 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 338 transitions. [2021-05-21 20:43:51,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:51,782 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 338 transitions. [2021-05-21 20:43:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:51,783 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:51,783 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:51,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:51,993 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash -468668944, now seen corresponding path program 29 times [2021-05-21 20:43:51,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:51,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126502056] [2021-05-21 20:43:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:52,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126502056] [2021-05-21 20:43:52,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126502056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260717814] [2021-05-21 20:43:52,038 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 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 [2021-05-21 20:43:52,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:52,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:52,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:52,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:52,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260717814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:52,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:52,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:43:52,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215840065] [2021-05-21 20:43:52,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:43:52,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:43:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:43:52,134 INFO L87 Difference]: Start difference. First operand 117 states and 338 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:52,354 INFO L93 Difference]: Finished difference Result 195 states and 528 transitions. [2021-05-21 20:43:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:52,355 INFO L225 Difference]: With dead ends: 195 [2021-05-21 20:43:52,355 INFO L226 Difference]: Without dead ends: 189 [2021-05-21 20:43:52,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-21 20:43:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 115. [2021-05-21 20:43:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.8947368421052633) internal successors, (330), 114 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 330 transitions. [2021-05-21 20:43:52,357 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 330 transitions. Word has length 15 [2021-05-21 20:43:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:52,357 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 330 transitions. [2021-05-21 20:43:52,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 330 transitions. [2021-05-21 20:43:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:43:52,358 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:52,358 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:52,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-21 20:43:52,558 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:52,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:52,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1003898746, now seen corresponding path program 30 times [2021-05-21 20:43:52,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:52,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848757012] [2021-05-21 20:43:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:52,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:52,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848757012] [2021-05-21 20:43:52,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848757012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:52,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89479029] [2021-05-21 20:43:52,598 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 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 [2021-05-21 20:43:52,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:43:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:52,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:43:52,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:52,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89479029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:52,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:52,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:43:52,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409188260] [2021-05-21 20:43:52,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:52,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:52,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:52,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:52,678 INFO L87 Difference]: Start difference. First operand 115 states and 330 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:52,845 INFO L93 Difference]: Finished difference Result 166 states and 460 transitions. [2021-05-21 20:43:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:43:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:52,846 INFO L225 Difference]: With dead ends: 166 [2021-05-21 20:43:52,846 INFO L226 Difference]: Without dead ends: 159 [2021-05-21 20:43:52,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:43:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-21 20:43:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 113. [2021-05-21 20:43:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.875) internal successors, (322), 112 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 322 transitions. [2021-05-21 20:43:52,848 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 322 transitions. Word has length 15 [2021-05-21 20:43:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:52,848 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 322 transitions. [2021-05-21 20:43:52,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 322 transitions. [2021-05-21 20:43:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:52,848 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:52,848 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:53,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-05-21 20:43:53,057 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:53,057 INFO L82 PathProgramCache]: Analyzing trace with hash -639898996, now seen corresponding path program 1 times [2021-05-21 20:43:53,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:53,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821866423] [2021-05-21 20:43:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:53,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:53,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821866423] [2021-05-21 20:43:53,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821866423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:53,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476017605] [2021-05-21 20:43:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 20:43:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:53,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:53,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476017605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:53,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:53,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:43:53,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767064754] [2021-05-21 20:43:53,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:43:53,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:53,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:43:53,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:43:53,147 INFO L87 Difference]: Start difference. First operand 113 states and 322 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:53,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:53,219 INFO L93 Difference]: Finished difference Result 186 states and 521 transitions. [2021-05-21 20:43:53,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:53,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:53,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:53,220 INFO L225 Difference]: With dead ends: 186 [2021-05-21 20:43:53,220 INFO L226 Difference]: Without dead ends: 186 [2021-05-21 20:43:53,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-21 20:43:53,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 126. [2021-05-21 20:43:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.992) internal successors, (374), 125 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) [2021-05-21 20:43:53,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 374 transitions. [2021-05-21 20:43:53,223 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 374 transitions. Word has length 16 [2021-05-21 20:43:53,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:53,223 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 374 transitions. [2021-05-21 20:43:53,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:53,223 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 374 transitions. [2021-05-21 20:43:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:53,223 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:53,223 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:53,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:53,423 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:53,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:53,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1991072770, now seen corresponding path program 1 times [2021-05-21 20:43:53,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:53,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043736189] [2021-05-21 20:43:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:53,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:53,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043736189] [2021-05-21 20:43:53,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043736189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:53,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711505228] [2021-05-21 20:43:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:53,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:53,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:53,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711505228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:53,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:53,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:53,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922530088] [2021-05-21 20:43:53,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:53,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:53,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:53,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:53,528 INFO L87 Difference]: Start difference. First operand 126 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:53,599 INFO L93 Difference]: Finished difference Result 163 states and 462 transitions. [2021-05-21 20:43:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:53,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:53,600 INFO L225 Difference]: With dead ends: 163 [2021-05-21 20:43:53,600 INFO L226 Difference]: Without dead ends: 153 [2021-05-21 20:43:53,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:43:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-21 20:43:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 126. [2021-05-21 20:43:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.952) internal successors, (369), 125 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 369 transitions. [2021-05-21 20:43:53,602 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 369 transitions. Word has length 16 [2021-05-21 20:43:53,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:53,602 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 369 transitions. [2021-05-21 20:43:53,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 369 transitions. [2021-05-21 20:43:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:53,602 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:53,603 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:53,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-05-21 20:43:53,813 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:53,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1652532542, now seen corresponding path program 2 times [2021-05-21 20:43:53,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:53,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888744567] [2021-05-21 20:43:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:53,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:53,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888744567] [2021-05-21 20:43:53,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888744567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:53,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314431323] [2021-05-21 20:43:53,843 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 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 [2021-05-21 20:43:53,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:53,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:53,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:53,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:53,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314431323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:53,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:53,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:53,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221069596] [2021-05-21 20:43:53,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:53,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:53,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:53,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:53,921 INFO L87 Difference]: Start difference. First operand 126 states and 369 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:54,007 INFO L93 Difference]: Finished difference Result 193 states and 538 transitions. [2021-05-21 20:43:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:54,008 INFO L225 Difference]: With dead ends: 193 [2021-05-21 20:43:54,008 INFO L226 Difference]: Without dead ends: 193 [2021-05-21 20:43:54,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:43:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-21 20:43:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 129. [2021-05-21 20:43:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0) internal successors, (384), 128 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 384 transitions. [2021-05-21 20:43:54,021 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 384 transitions. Word has length 16 [2021-05-21 20:43:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:54,022 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 384 transitions. [2021-05-21 20:43:54,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 384 transitions. [2021-05-21 20:43:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:54,022 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:54,022 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:54,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:54,233 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1447398580, now seen corresponding path program 2 times [2021-05-21 20:43:54,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:54,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379250126] [2021-05-21 20:43:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:54,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:54,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379250126] [2021-05-21 20:43:54,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379250126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:54,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454301223] [2021-05-21 20:43:54,259 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 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 [2021-05-21 20:43:54,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:54,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:54,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:54,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:54,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454301223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:54,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:54,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:43:54,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270617569] [2021-05-21 20:43:54,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:54,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:54,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:54,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:54,337 INFO L87 Difference]: Start difference. First operand 129 states and 384 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:54,418 INFO L93 Difference]: Finished difference Result 180 states and 505 transitions. [2021-05-21 20:43:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:54,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:54,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:54,419 INFO L225 Difference]: With dead ends: 180 [2021-05-21 20:43:54,419 INFO L226 Difference]: Without dead ends: 176 [2021-05-21 20:43:54,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-21 20:43:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-05-21 20:43:54,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.9925925925925925) internal successors, (404), 135 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 404 transitions. [2021-05-21 20:43:54,421 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 404 transitions. Word has length 16 [2021-05-21 20:43:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:54,421 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 404 transitions. [2021-05-21 20:43:54,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 404 transitions. [2021-05-21 20:43:54,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:54,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:54,422 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:54,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:54,637 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:54,637 INFO L82 PathProgramCache]: Analyzing trace with hash -18443474, now seen corresponding path program 3 times [2021-05-21 20:43:54,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:54,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435158680] [2021-05-21 20:43:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:54,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:54,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435158680] [2021-05-21 20:43:54,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435158680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:54,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037958292] [2021-05-21 20:43:54,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:54,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:54,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:54,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:54,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:54,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037958292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:54,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:54,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:54,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696302614] [2021-05-21 20:43:54,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:54,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:54,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:54,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:54,725 INFO L87 Difference]: Start difference. First operand 136 states and 404 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:54,804 INFO L93 Difference]: Finished difference Result 176 states and 499 transitions. [2021-05-21 20:43:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:54,804 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:54,805 INFO L225 Difference]: With dead ends: 176 [2021-05-21 20:43:54,805 INFO L226 Difference]: Without dead ends: 173 [2021-05-21 20:43:54,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:43:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-21 20:43:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2021-05-21 20:43:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.9703703703703703) internal successors, (401), 135 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 401 transitions. [2021-05-21 20:43:54,809 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 401 transitions. Word has length 16 [2021-05-21 20:43:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:54,809 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 401 transitions. [2021-05-21 20:43:54,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 401 transitions. [2021-05-21 20:43:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:54,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:54,810 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:55,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:55,021 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:55,021 INFO L82 PathProgramCache]: Analyzing trace with hash 907579970, now seen corresponding path program 3 times [2021-05-21 20:43:55,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:55,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976268324] [2021-05-21 20:43:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:55,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:55,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976268324] [2021-05-21 20:43:55,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976268324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:55,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034117912] [2021-05-21 20:43:55,050 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 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 [2021-05-21 20:43:55,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:55,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:55,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:55,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:55,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034117912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:55,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:55,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:43:55,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749404772] [2021-05-21 20:43:55,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:55,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:55,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:55,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:55,125 INFO L87 Difference]: Start difference. First operand 136 states and 401 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:55,209 INFO L93 Difference]: Finished difference Result 162 states and 468 transitions. [2021-05-21 20:43:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:55,210 INFO L225 Difference]: With dead ends: 162 [2021-05-21 20:43:55,210 INFO L226 Difference]: Without dead ends: 162 [2021-05-21 20:43:55,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-21 20:43:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-05-21 20:43:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.9770992366412212) internal successors, (390), 131 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 390 transitions. [2021-05-21 20:43:55,212 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 390 transitions. Word has length 16 [2021-05-21 20:43:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:55,212 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 390 transitions. [2021-05-21 20:43:55,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 390 transitions. [2021-05-21 20:43:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:55,212 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:55,212 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:55,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:55,413 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash -408327260, now seen corresponding path program 4 times [2021-05-21 20:43:55,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:55,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324623252] [2021-05-21 20:43:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:55,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:55,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324623252] [2021-05-21 20:43:55,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324623252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:55,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585068387] [2021-05-21 20:43:55,444 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 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 [2021-05-21 20:43:55,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:55,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:55,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:55,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:55,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585068387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:55,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:55,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:43:55,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433384422] [2021-05-21 20:43:55,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:55,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:55,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:55,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:55,516 INFO L87 Difference]: Start difference. First operand 132 states and 390 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:55,601 INFO L93 Difference]: Finished difference Result 192 states and 545 transitions. [2021-05-21 20:43:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:55,602 INFO L225 Difference]: With dead ends: 192 [2021-05-21 20:43:55,602 INFO L226 Difference]: Without dead ends: 192 [2021-05-21 20:43:55,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-21 20:43:55,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2021-05-21 20:43:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0437956204379564) internal successors, (417), 137 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 417 transitions. [2021-05-21 20:43:55,605 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 417 transitions. Word has length 16 [2021-05-21 20:43:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:55,605 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 417 transitions. [2021-05-21 20:43:55,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 417 transitions. [2021-05-21 20:43:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:55,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:55,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:55,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-21 20:43:55,806 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:55,806 INFO L82 PathProgramCache]: Analyzing trace with hash 786708914, now seen corresponding path program 4 times [2021-05-21 20:43:55,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:55,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604308179] [2021-05-21 20:43:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:55,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:55,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604308179] [2021-05-21 20:43:55,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604308179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:55,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037755805] [2021-05-21 20:43:55,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:55,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:55,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:55,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:55,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:55,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037755805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:55,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:55,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:55,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434348439] [2021-05-21 20:43:55,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:55,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:55,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:55,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:55,900 INFO L87 Difference]: Start difference. First operand 138 states and 417 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:55,996 INFO L93 Difference]: Finished difference Result 198 states and 562 transitions. [2021-05-21 20:43:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:55,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:55,997 INFO L225 Difference]: With dead ends: 198 [2021-05-21 20:43:55,997 INFO L226 Difference]: Without dead ends: 194 [2021-05-21 20:43:55,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:43:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-21 20:43:55,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2021-05-21 20:43:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.054421768707483) internal successors, (449), 147 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 449 transitions. [2021-05-21 20:43:55,999 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 449 transitions. Word has length 16 [2021-05-21 20:43:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:55,999 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 449 transitions. [2021-05-21 20:43:55,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 449 transitions. [2021-05-21 20:43:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:56,000 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:56,000 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:56,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-05-21 20:43:56,213 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2079303276, now seen corresponding path program 5 times [2021-05-21 20:43:56,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:56,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069227981] [2021-05-21 20:43:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:56,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:56,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069227981] [2021-05-21 20:43:56,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069227981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:56,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759469624] [2021-05-21 20:43:56,237 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 [2021-05-21 20:43:56,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:56,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:56,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:56,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759469624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:56,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:56,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:43:56,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594095518] [2021-05-21 20:43:56,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:56,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:56,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:56,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:56,309 INFO L87 Difference]: Start difference. First operand 148 states and 449 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:56,388 INFO L93 Difference]: Finished difference Result 201 states and 572 transitions. [2021-05-21 20:43:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:56,389 INFO L225 Difference]: With dead ends: 201 [2021-05-21 20:43:56,389 INFO L226 Difference]: Without dead ends: 198 [2021-05-21 20:43:56,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-21 20:43:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2021-05-21 20:43:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.0340136054421767) internal successors, (446), 147 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 446 transitions. [2021-05-21 20:43:56,391 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 446 transitions. Word has length 16 [2021-05-21 20:43:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:56,391 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 446 transitions. [2021-05-21 20:43:56,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 446 transitions. [2021-05-21 20:43:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:56,392 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:56,392 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:56,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-05-21 20:43:56,601 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:56,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1153279832, now seen corresponding path program 5 times [2021-05-21 20:43:56,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:56,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114537853] [2021-05-21 20:43:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:56,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:56,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114537853] [2021-05-21 20:43:56,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114537853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:56,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449792349] [2021-05-21 20:43:56,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:56,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:56,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:56,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:56,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:56,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449792349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:56,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:56,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:56,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708786894] [2021-05-21 20:43:56,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:56,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:56,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:56,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:56,702 INFO L87 Difference]: Start difference. First operand 148 states and 446 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:56,790 INFO L93 Difference]: Finished difference Result 200 states and 570 transitions. [2021-05-21 20:43:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:56,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:56,791 INFO L225 Difference]: With dead ends: 200 [2021-05-21 20:43:56,791 INFO L226 Difference]: Without dead ends: 200 [2021-05-21 20:43:56,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:43:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-21 20:43:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 145. [2021-05-21 20:43:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0347222222222223) internal successors, (437), 144 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 437 transitions. [2021-05-21 20:43:56,793 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 437 transitions. Word has length 16 [2021-05-21 20:43:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:56,794 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 437 transitions. [2021-05-21 20:43:56,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 437 transitions. [2021-05-21 20:43:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:56,794 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:56,794 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:57,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-05-21 20:43:57,010 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:57,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1341923340, now seen corresponding path program 6 times [2021-05-21 20:43:57,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:57,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179264642] [2021-05-21 20:43:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:57,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:57,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179264642] [2021-05-21 20:43:57,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179264642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:57,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502737573] [2021-05-21 20:43:57,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:57,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:43:57,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:57,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:57,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502737573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:57,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:57,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:57,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695839541] [2021-05-21 20:43:57,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:57,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:57,101 INFO L87 Difference]: Start difference. First operand 145 states and 437 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:57,184 INFO L93 Difference]: Finished difference Result 178 states and 518 transitions. [2021-05-21 20:43:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:57,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:57,185 INFO L225 Difference]: With dead ends: 178 [2021-05-21 20:43:57,185 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:43:57,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:43:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:43:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2021-05-21 20:43:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.013888888888889) internal successors, (434), 144 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 434 transitions. [2021-05-21 20:43:57,187 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 434 transitions. Word has length 16 [2021-05-21 20:43:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:57,187 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 434 transitions. [2021-05-21 20:43:57,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 434 transitions. [2021-05-21 20:43:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:57,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:57,188 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:57,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:57,393 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:57,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1171713858, now seen corresponding path program 6 times [2021-05-21 20:43:57,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:57,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916441175] [2021-05-21 20:43:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:57,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916441175] [2021-05-21 20:43:57,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916441175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395462797] [2021-05-21 20:43:57,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:57,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:43:57,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:57,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:57,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395462797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:57,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:57,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:43:57,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3951141] [2021-05-21 20:43:57,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:43:57,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:57,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:43:57,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:43:57,489 INFO L87 Difference]: Start difference. First operand 145 states and 434 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:57,567 INFO L93 Difference]: Finished difference Result 200 states and 574 transitions. [2021-05-21 20:43:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:57,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:57,568 INFO L225 Difference]: With dead ends: 200 [2021-05-21 20:43:57,568 INFO L226 Difference]: Without dead ends: 200 [2021-05-21 20:43:57,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-21 20:43:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2021-05-21 20:43:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0) internal successors, (411), 137 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 411 transitions. [2021-05-21 20:43:57,570 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 411 transitions. Word has length 16 [2021-05-21 20:43:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:57,570 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 411 transitions. [2021-05-21 20:43:57,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 411 transitions. [2021-05-21 20:43:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:57,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:57,570 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:57,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-05-21 20:43:57,773 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:57,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:57,773 INFO L82 PathProgramCache]: Analyzing trace with hash 228804358, now seen corresponding path program 7 times [2021-05-21 20:43:57,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:57,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022111904] [2021-05-21 20:43:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:57,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:57,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022111904] [2021-05-21 20:43:57,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022111904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:57,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604513398] [2021-05-21 20:43:57,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:57,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604513398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:57,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:57,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:43:57,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413137531] [2021-05-21 20:43:57,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:43:57,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:57,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:43:57,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:43:57,862 INFO L87 Difference]: Start difference. First operand 138 states and 411 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:57,935 INFO L93 Difference]: Finished difference Result 314 states and 911 transitions. [2021-05-21 20:43:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:57,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:57,936 INFO L225 Difference]: With dead ends: 314 [2021-05-21 20:43:57,936 INFO L226 Difference]: Without dead ends: 314 [2021-05-21 20:43:57,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:43:57,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-21 20:43:57,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 152. [2021-05-21 20:43:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0927152317880795) internal successors, (467), 151 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 467 transitions. [2021-05-21 20:43:57,939 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 467 transitions. Word has length 16 [2021-05-21 20:43:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:57,939 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 467 transitions. [2021-05-21 20:43:57,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 467 transitions. [2021-05-21 20:43:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:57,939 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:57,940 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:58,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:58,140 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:58,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1435191172, now seen corresponding path program 7 times [2021-05-21 20:43:58,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:58,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100883151] [2021-05-21 20:43:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:58,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:58,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100883151] [2021-05-21 20:43:58,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100883151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:58,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260886758] [2021-05-21 20:43:58,166 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 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 [2021-05-21 20:43:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:58,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:58,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:58,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260886758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:58,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:58,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:43:58,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132573160] [2021-05-21 20:43:58,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:43:58,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:58,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:43:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:43:58,234 INFO L87 Difference]: Start difference. First operand 152 states and 467 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:58,299 INFO L93 Difference]: Finished difference Result 257 states and 727 transitions. [2021-05-21 20:43:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:58,300 INFO L225 Difference]: With dead ends: 257 [2021-05-21 20:43:58,301 INFO L226 Difference]: Without dead ends: 247 [2021-05-21 20:43:58,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:43:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-21 20:43:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 152. [2021-05-21 20:43:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0596026490066226) internal successors, (462), 151 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 462 transitions. [2021-05-21 20:43:58,303 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 462 transitions. Word has length 16 [2021-05-21 20:43:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:58,303 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 462 transitions. [2021-05-21 20:43:58,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 462 transitions. [2021-05-21 20:43:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:58,304 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:58,304 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:58,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-05-21 20:43:58,517 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1773731400, now seen corresponding path program 8 times [2021-05-21 20:43:58,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:58,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210647740] [2021-05-21 20:43:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:58,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:58,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210647740] [2021-05-21 20:43:58,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210647740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:58,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754051060] [2021-05-21 20:43:58,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:58,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:58,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:58,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:58,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754051060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:58,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:58,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:58,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77310652] [2021-05-21 20:43:58,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:58,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:58,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:58,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:58,615 INFO L87 Difference]: Start difference. First operand 152 states and 462 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:58,698 INFO L93 Difference]: Finished difference Result 311 states and 888 transitions. [2021-05-21 20:43:58,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:58,699 INFO L225 Difference]: With dead ends: 311 [2021-05-21 20:43:58,699 INFO L226 Difference]: Without dead ends: 311 [2021-05-21 20:43:58,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-21 20:43:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 158. [2021-05-21 20:43:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.1337579617834397) internal successors, (492), 157 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 492 transitions. [2021-05-21 20:43:58,702 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 492 transitions. Word has length 16 [2021-05-21 20:43:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:58,702 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 492 transitions. [2021-05-21 20:43:58,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 492 transitions. [2021-05-21 20:43:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:58,703 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:58,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:58,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:58,903 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:58,903 INFO L82 PathProgramCache]: Analyzing trace with hash -578695226, now seen corresponding path program 8 times [2021-05-21 20:43:58,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:58,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702994212] [2021-05-21 20:43:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:58,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:58,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702994212] [2021-05-21 20:43:58,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702994212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:58,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124586775] [2021-05-21 20:43:58,933 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 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 [2021-05-21 20:43:58,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:58,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:58,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:59,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124586775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:59,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:59,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:43:59,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526674865] [2021-05-21 20:43:59,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:43:59,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:59,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:43:59,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:43:59,016 INFO L87 Difference]: Start difference. First operand 158 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:59,090 INFO L93 Difference]: Finished difference Result 283 states and 806 transitions. [2021-05-21 20:43:59,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:59,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:59,091 INFO L225 Difference]: With dead ends: 283 [2021-05-21 20:43:59,091 INFO L226 Difference]: Without dead ends: 279 [2021-05-21 20:43:59,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-21 20:43:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 165. [2021-05-21 20:43:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.1219512195121952) internal successors, (512), 164 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 512 transitions. [2021-05-21 20:43:59,094 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 512 transitions. Word has length 16 [2021-05-21 20:43:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:59,094 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 512 transitions. [2021-05-21 20:43:59,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 512 transitions. [2021-05-21 20:43:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:59,095 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:59,095 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:59,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-05-21 20:43:59,295 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash 850259880, now seen corresponding path program 9 times [2021-05-21 20:43:59,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:59,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594296423] [2021-05-21 20:43:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:59,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:59,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594296423] [2021-05-21 20:43:59,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594296423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:59,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639912466] [2021-05-21 20:43:59,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:59,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:59,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:59,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:59,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:59,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639912466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:59,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:59,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:43:59,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944064285] [2021-05-21 20:43:59,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:43:59,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:59,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:43:59,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:43:59,387 INFO L87 Difference]: Start difference. First operand 165 states and 512 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:59,468 INFO L93 Difference]: Finished difference Result 294 states and 846 transitions. [2021-05-21 20:43:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:59,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:59,469 INFO L225 Difference]: With dead ends: 294 [2021-05-21 20:43:59,469 INFO L226 Difference]: Without dead ends: 291 [2021-05-21 20:43:59,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:43:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-05-21 20:43:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2021-05-21 20:43:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.0838323353293413) internal successors, (515), 167 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 515 transitions. [2021-05-21 20:43:59,472 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 515 transitions. Word has length 16 [2021-05-21 20:43:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:59,472 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 515 transitions. [2021-05-21 20:43:59,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 515 transitions. [2021-05-21 20:43:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:59,473 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:59,473 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:59,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:59,688 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:59,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1776283324, now seen corresponding path program 9 times [2021-05-21 20:43:59,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:59,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909914693] [2021-05-21 20:43:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:59,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:59,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909914693] [2021-05-21 20:43:59,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909914693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:59,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202612738] [2021-05-21 20:43:59,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:59,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:43:59,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:59,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:43:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:59,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202612738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:59,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:59,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:43:59,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686008962] [2021-05-21 20:43:59,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:43:59,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:43:59,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:43:59,801 INFO L87 Difference]: Start difference. First operand 168 states and 515 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:59,889 INFO L93 Difference]: Finished difference Result 271 states and 781 transitions. [2021-05-21 20:43:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:43:59,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:43:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:59,890 INFO L225 Difference]: With dead ends: 271 [2021-05-21 20:43:59,890 INFO L226 Difference]: Without dead ends: 271 [2021-05-21 20:43:59,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:43:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-21 20:43:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 153. [2021-05-21 20:43:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.0789473684210527) internal successors, (468), 152 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 468 transitions. [2021-05-21 20:43:59,893 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 468 transitions. Word has length 16 [2021-05-21 20:43:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:59,893 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 468 transitions. [2021-05-21 20:43:59,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 468 transitions. [2021-05-21 20:43:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:43:59,893 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:59,893 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:00,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-05-21 20:44:00,094 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:00,094 INFO L82 PathProgramCache]: Analyzing trace with hash -2036008658, now seen corresponding path program 10 times [2021-05-21 20:44:00,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:00,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120053420] [2021-05-21 20:44:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:44:00,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:00,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120053420] [2021-05-21 20:44:00,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120053420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:00,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148807758] [2021-05-21 20:44:00,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:00,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:00,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:00,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:00,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148807758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:00,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:00,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:44:00,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685655023] [2021-05-21 20:44:00,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:00,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:00,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:00,219 INFO L87 Difference]: Start difference. First operand 153 states and 468 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:00,540 INFO L93 Difference]: Finished difference Result 308 states and 874 transitions. [2021-05-21 20:44:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:44:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:00,542 INFO L225 Difference]: With dead ends: 308 [2021-05-21 20:44:00,542 INFO L226 Difference]: Without dead ends: 298 [2021-05-21 20:44:00,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:44:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-21 20:44:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 143. [2021-05-21 20:44:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.035211267605634) internal successors, (431), 142 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 431 transitions. [2021-05-21 20:44:00,544 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 431 transitions. Word has length 16 [2021-05-21 20:44:00,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:00,544 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 431 transitions. [2021-05-21 20:44:00,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 431 transitions. [2021-05-21 20:44:00,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:00,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:00,545 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:00,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:00,745 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1350168710, now seen corresponding path program 10 times [2021-05-21 20:44:00,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:00,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976763288] [2021-05-21 20:44:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:00,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:00,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976763288] [2021-05-21 20:44:00,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976763288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:00,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:00,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:00,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476978995] [2021-05-21 20:44:00,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:00,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:00,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:00,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:00,770 INFO L87 Difference]: Start difference. First operand 143 states and 431 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:00,853 INFO L93 Difference]: Finished difference Result 204 states and 571 transitions. [2021-05-21 20:44:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:00,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:00,854 INFO L225 Difference]: With dead ends: 204 [2021-05-21 20:44:00,854 INFO L226 Difference]: Without dead ends: 194 [2021-05-21 20:44:00,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-21 20:44:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 145. [2021-05-21 20:44:00,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0069444444444446) internal successors, (433), 144 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 433 transitions. [2021-05-21 20:44:00,857 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 433 transitions. Word has length 16 [2021-05-21 20:44:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:00,857 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 433 transitions. [2021-05-21 20:44:00,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 433 transitions. [2021-05-21 20:44:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:00,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:00,857 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:00,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-05-21 20:44:00,857 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash -474092858, now seen corresponding path program 11 times [2021-05-21 20:44:00,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:00,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904717400] [2021-05-21 20:44:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:00,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:00,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904717400] [2021-05-21 20:44:00,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904717400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:00,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:00,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:00,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537148600] [2021-05-21 20:44:00,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:00,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:00,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:00,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:00,888 INFO L87 Difference]: Start difference. First operand 145 states and 433 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:00,997 INFO L93 Difference]: Finished difference Result 197 states and 551 transitions. [2021-05-21 20:44:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:00,998 INFO L225 Difference]: With dead ends: 197 [2021-05-21 20:44:00,998 INFO L226 Difference]: Without dead ends: 193 [2021-05-21 20:44:00,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-21 20:44:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 151. [2021-05-21 20:44:01,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.966666666666667) internal successors, (445), 150 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 445 transitions. [2021-05-21 20:44:01,000 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 445 transitions. Word has length 16 [2021-05-21 20:44:01,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:01,000 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 445 transitions. [2021-05-21 20:44:01,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,000 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 445 transitions. [2021-05-21 20:44:01,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:01,000 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:01,000 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:01,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-05-21 20:44:01,001 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:01,001 INFO L82 PathProgramCache]: Analyzing trace with hash -547465338, now seen corresponding path program 12 times [2021-05-21 20:44:01,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:01,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652996289] [2021-05-21 20:44:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:01,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:01,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652996289] [2021-05-21 20:44:01,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652996289] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:01,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:01,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:01,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760130843] [2021-05-21 20:44:01,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:01,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:01,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:01,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:01,030 INFO L87 Difference]: Start difference. First operand 151 states and 445 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:01,115 INFO L93 Difference]: Finished difference Result 182 states and 529 transitions. [2021-05-21 20:44:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:01,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:01,116 INFO L225 Difference]: With dead ends: 182 [2021-05-21 20:44:01,116 INFO L226 Difference]: Without dead ends: 177 [2021-05-21 20:44:01,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-21 20:44:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 143. [2021-05-21 20:44:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.0211267605633805) internal successors, (429), 142 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 429 transitions. [2021-05-21 20:44:01,119 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 429 transitions. Word has length 16 [2021-05-21 20:44:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:01,119 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 429 transitions. [2021-05-21 20:44:01,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 429 transitions. [2021-05-21 20:44:01,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:01,119 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:01,119 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:01,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-05-21 20:44:01,119 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:01,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1766834084, now seen corresponding path program 11 times [2021-05-21 20:44:01,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:01,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486881713] [2021-05-21 20:44:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:01,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486881713] [2021-05-21 20:44:01,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486881713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837963355] [2021-05-21 20:44:01,170 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 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 [2021-05-21 20:44:01,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:01,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837963355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:01,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:01,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-21 20:44:01,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12465171] [2021-05-21 20:44:01,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:44:01,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:44:01,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:01,270 INFO L87 Difference]: Start difference. First operand 143 states and 429 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:01,458 INFO L93 Difference]: Finished difference Result 259 states and 737 transitions. [2021-05-21 20:44:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:01,466 INFO L225 Difference]: With dead ends: 259 [2021-05-21 20:44:01,466 INFO L226 Difference]: Without dead ends: 259 [2021-05-21 20:44:01,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:44:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-21 20:44:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 151. [2021-05-21 20:44:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 3.1266666666666665) internal successors, (469), 150 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 469 transitions. [2021-05-21 20:44:01,469 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 469 transitions. Word has length 16 [2021-05-21 20:44:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:01,469 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 469 transitions. [2021-05-21 20:44:01,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 469 transitions. [2021-05-21 20:44:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:01,469 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:01,470 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:01,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-05-21 20:44:01,685 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:01,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1333097038, now seen corresponding path program 13 times [2021-05-21 20:44:01,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:01,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598432570] [2021-05-21 20:44:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:01,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598432570] [2021-05-21 20:44:01,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598432570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596040470] [2021-05-21 20:44:01,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:44:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:01,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:01,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:01,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596040470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:01,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:01,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:01,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991639951] [2021-05-21 20:44:01,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:01,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:01,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:01,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:01,798 INFO L87 Difference]: Start difference. First operand 151 states and 469 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:01,875 INFO L93 Difference]: Finished difference Result 245 states and 702 transitions. [2021-05-21 20:44:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:01,877 INFO L225 Difference]: With dead ends: 245 [2021-05-21 20:44:01,877 INFO L226 Difference]: Without dead ends: 241 [2021-05-21 20:44:01,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:01,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-21 20:44:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 159. [2021-05-21 20:44:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.1265822784810124) internal successors, (494), 158 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 494 transitions. [2021-05-21 20:44:01,879 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 494 transitions. Word has length 16 [2021-05-21 20:44:01,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:01,879 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 494 transitions. [2021-05-21 20:44:01,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 494 transitions. [2021-05-21 20:44:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:01,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:01,880 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:02,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-05-21 20:44:02,085 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:02,085 INFO L82 PathProgramCache]: Analyzing trace with hash 95858068, now seen corresponding path program 12 times [2021-05-21 20:44:02,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:02,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088655921] [2021-05-21 20:44:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:02,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:02,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088655921] [2021-05-21 20:44:02,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088655921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:02,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002485052] [2021-05-21 20:44:02,128 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 [2021-05-21 20:44:02,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:02,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:02,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:02,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002485052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:02,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:02,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-21 20:44:02,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040290673] [2021-05-21 20:44:02,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:44:02,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:02,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:44:02,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:02,224 INFO L87 Difference]: Start difference. First operand 159 states and 494 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:02,413 INFO L93 Difference]: Finished difference Result 256 states and 722 transitions. [2021-05-21 20:44:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:02,414 INFO L225 Difference]: With dead ends: 256 [2021-05-21 20:44:02,414 INFO L226 Difference]: Without dead ends: 253 [2021-05-21 20:44:02,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:44:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-21 20:44:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 162. [2021-05-21 20:44:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.0869565217391304) internal successors, (497), 161 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 497 transitions. [2021-05-21 20:44:02,417 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 497 transitions. Word has length 16 [2021-05-21 20:44:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:02,417 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 497 transitions. [2021-05-21 20:44:02,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 497 transitions. [2021-05-21 20:44:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:02,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:02,417 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:02,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:02,633 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1021881512, now seen corresponding path program 14 times [2021-05-21 20:44:02,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:02,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475785059] [2021-05-21 20:44:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:02,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:02,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475785059] [2021-05-21 20:44:02,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475785059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:02,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509136727] [2021-05-21 20:44:02,663 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 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 [2021-05-21 20:44:02,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:02,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:02,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:02,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509136727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:02,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:02,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:02,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746955668] [2021-05-21 20:44:02,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:02,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:02,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:02,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:02,755 INFO L87 Difference]: Start difference. First operand 162 states and 497 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:02,839 INFO L93 Difference]: Finished difference Result 260 states and 746 transitions. [2021-05-21 20:44:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:02,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:02,843 INFO L225 Difference]: With dead ends: 260 [2021-05-21 20:44:02,843 INFO L226 Difference]: Without dead ends: 260 [2021-05-21 20:44:02,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-21 20:44:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 159. [2021-05-21 20:44:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.088607594936709) internal successors, (488), 158 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 488 transitions. [2021-05-21 20:44:02,846 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 488 transitions. Word has length 16 [2021-05-21 20:44:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:02,846 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 488 transitions. [2021-05-21 20:44:02,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 488 transitions. [2021-05-21 20:44:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:02,846 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:02,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:03,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-05-21 20:44:03,061 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:03,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2109417596, now seen corresponding path program 13 times [2021-05-21 20:44:03,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:03,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664018505] [2021-05-21 20:44:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:03,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:03,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664018505] [2021-05-21 20:44:03,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664018505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:03,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422756408] [2021-05-21 20:44:03,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:03,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:03,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422756408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:03,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:03,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:03,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913204701] [2021-05-21 20:44:03,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:03,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:03,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:03,161 INFO L87 Difference]: Start difference. First operand 159 states and 488 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:03,241 INFO L93 Difference]: Finished difference Result 256 states and 720 transitions. [2021-05-21 20:44:03,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:03,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:03,242 INFO L225 Difference]: With dead ends: 256 [2021-05-21 20:44:03,242 INFO L226 Difference]: Without dead ends: 256 [2021-05-21 20:44:03,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:03,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-21 20:44:03,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 154. [2021-05-21 20:44:03,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.0718954248366015) internal successors, (470), 153 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:03,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 470 transitions. [2021-05-21 20:44:03,245 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 470 transitions. Word has length 16 [2021-05-21 20:44:03,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:03,245 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 470 transitions. [2021-05-21 20:44:03,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:03,245 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 470 transitions. [2021-05-21 20:44:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:03,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:03,245 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:03,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-21 20:44:03,446 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:03,446 INFO L82 PathProgramCache]: Analyzing trace with hash -213836346, now seen corresponding path program 14 times [2021-05-21 20:44:03,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:03,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102955939] [2021-05-21 20:44:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:03,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:03,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102955939] [2021-05-21 20:44:03,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102955939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:03,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859012243] [2021-05-21 20:44:03,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:03,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:03,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:03,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:03,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:03,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859012243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:03,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:03,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:03,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355199554] [2021-05-21 20:44:03,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:03,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:03,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:03,548 INFO L87 Difference]: Start difference. First operand 154 states and 470 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:03,619 INFO L93 Difference]: Finished difference Result 234 states and 666 transitions. [2021-05-21 20:44:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:03,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:03,620 INFO L225 Difference]: With dead ends: 234 [2021-05-21 20:44:03,620 INFO L226 Difference]: Without dead ends: 232 [2021-05-21 20:44:03,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-21 20:44:03,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 152. [2021-05-21 20:44:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0596026490066226) internal successors, (462), 151 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 462 transitions. [2021-05-21 20:44:03,622 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 462 transitions. Word has length 16 [2021-05-21 20:44:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:03,622 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 462 transitions. [2021-05-21 20:44:03,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:03,622 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 462 transitions. [2021-05-21 20:44:03,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:03,623 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:03,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:03,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:03,823 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:03,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:03,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2074530712, now seen corresponding path program 15 times [2021-05-21 20:44:03,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:03,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465599596] [2021-05-21 20:44:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:03,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:03,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465599596] [2021-05-21 20:44:03,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465599596] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:03,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:03,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:03,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450777246] [2021-05-21 20:44:03,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:03,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:03,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:03,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:03,857 INFO L87 Difference]: Start difference. First operand 152 states and 462 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:03,945 INFO L93 Difference]: Finished difference Result 229 states and 636 transitions. [2021-05-21 20:44:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:03,946 INFO L225 Difference]: With dead ends: 229 [2021-05-21 20:44:03,946 INFO L226 Difference]: Without dead ends: 225 [2021-05-21 20:44:03,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-21 20:44:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 154. [2021-05-21 20:44:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.045751633986928) internal successors, (466), 153 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 466 transitions. [2021-05-21 20:44:03,950 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 466 transitions. Word has length 16 [2021-05-21 20:44:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:03,951 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 466 transitions. [2021-05-21 20:44:03,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 466 transitions. [2021-05-21 20:44:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:03,951 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:03,951 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:03,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2021-05-21 20:44:03,951 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:03,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2147064104, now seen corresponding path program 16 times [2021-05-21 20:44:03,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:03,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174026741] [2021-05-21 20:44:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:03,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:03,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174026741] [2021-05-21 20:44:03,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174026741] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:03,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:03,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:03,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088466403] [2021-05-21 20:44:03,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:03,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:03,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:03,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:03,980 INFO L87 Difference]: Start difference. First operand 154 states and 466 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:04,081 INFO L93 Difference]: Finished difference Result 212 states and 610 transitions. [2021-05-21 20:44:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:04,081 INFO L225 Difference]: With dead ends: 212 [2021-05-21 20:44:04,081 INFO L226 Difference]: Without dead ends: 209 [2021-05-21 20:44:04,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:04,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-21 20:44:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 153. [2021-05-21 20:44:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.0460526315789473) internal successors, (463), 152 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 463 transitions. [2021-05-21 20:44:04,084 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 463 transitions. Word has length 16 [2021-05-21 20:44:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:04,084 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 463 transitions. [2021-05-21 20:44:04,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 463 transitions. [2021-05-21 20:44:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:04,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:04,084 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:04,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2021-05-21 20:44:04,084 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1481357318, now seen corresponding path program 15 times [2021-05-21 20:44:04,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:04,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090162304] [2021-05-21 20:44:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:04,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:04,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090162304] [2021-05-21 20:44:04,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090162304] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:04,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:04,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:04,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249648160] [2021-05-21 20:44:04,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:04,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:04,108 INFO L87 Difference]: Start difference. First operand 153 states and 463 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:04,171 INFO L93 Difference]: Finished difference Result 222 states and 625 transitions. [2021-05-21 20:44:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:04,172 INFO L225 Difference]: With dead ends: 222 [2021-05-21 20:44:04,172 INFO L226 Difference]: Without dead ends: 219 [2021-05-21 20:44:04,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-21 20:44:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 158. [2021-05-21 20:44:04,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.0127388535031847) internal successors, (473), 157 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 473 transitions. [2021-05-21 20:44:04,175 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 473 transitions. Word has length 16 [2021-05-21 20:44:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:04,175 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 473 transitions. [2021-05-21 20:44:04,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 473 transitions. [2021-05-21 20:44:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:04,181 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:04,181 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:04,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2021-05-21 20:44:04,181 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash 384029742, now seen corresponding path program 16 times [2021-05-21 20:44:04,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:04,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548660074] [2021-05-21 20:44:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:04,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:04,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548660074] [2021-05-21 20:44:04,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548660074] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:04,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:04,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:04,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325667293] [2021-05-21 20:44:04,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:04,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:04,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:04,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:04,209 INFO L87 Difference]: Start difference. First operand 158 states and 473 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:04,270 INFO L93 Difference]: Finished difference Result 209 states and 606 transitions. [2021-05-21 20:44:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:04,270 INFO L225 Difference]: With dead ends: 209 [2021-05-21 20:44:04,270 INFO L226 Difference]: Without dead ends: 206 [2021-05-21 20:44:04,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:04,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-21 20:44:04,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 153. [2021-05-21 20:44:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.039473684210526) internal successors, (462), 152 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 462 transitions. [2021-05-21 20:44:04,273 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 462 transitions. Word has length 16 [2021-05-21 20:44:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:04,273 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 462 transitions. [2021-05-21 20:44:04,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 462 transitions. [2021-05-21 20:44:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:04,273 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:04,273 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:04,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2021-05-21 20:44:04,273 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1323363576, now seen corresponding path program 17 times [2021-05-21 20:44:04,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:04,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498567641] [2021-05-21 20:44:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:04,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:04,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498567641] [2021-05-21 20:44:04,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498567641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:04,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995456928] [2021-05-21 20:44:04,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:44:04,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:44:04,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:04,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:04,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995456928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:04,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:04,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:04,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217389041] [2021-05-21 20:44:04,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:04,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:04,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:04,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:04,387 INFO L87 Difference]: Start difference. First operand 153 states and 462 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:04,463 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-05-21 20:44:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:04,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:04,464 INFO L225 Difference]: With dead ends: 214 [2021-05-21 20:44:04,464 INFO L226 Difference]: Without dead ends: 214 [2021-05-21 20:44:04,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:04,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-21 20:44:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 151. [2021-05-21 20:44:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 3.0) internal successors, (450), 150 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 450 transitions. [2021-05-21 20:44:04,466 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 450 transitions. Word has length 16 [2021-05-21 20:44:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:04,466 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 450 transitions. [2021-05-21 20:44:04,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 450 transitions. [2021-05-21 20:44:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:04,467 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:04,467 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:04,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-05-21 20:44:04,667 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:04,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:04,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1610047614, now seen corresponding path program 18 times [2021-05-21 20:44:04,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:04,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505259668] [2021-05-21 20:44:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:04,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:04,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505259668] [2021-05-21 20:44:04,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505259668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:04,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:04,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:04,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615669129] [2021-05-21 20:44:04,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:04,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:04,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:04,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:04,704 INFO L87 Difference]: Start difference. First operand 151 states and 450 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:04,797 INFO L93 Difference]: Finished difference Result 191 states and 561 transitions. [2021-05-21 20:44:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:04,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:04,798 INFO L225 Difference]: With dead ends: 191 [2021-05-21 20:44:04,798 INFO L226 Difference]: Without dead ends: 189 [2021-05-21 20:44:04,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-21 20:44:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 145. [2021-05-21 20:44:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0277777777777777) internal successors, (436), 144 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 436 transitions. [2021-05-21 20:44:04,800 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 436 transitions. Word has length 16 [2021-05-21 20:44:04,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:04,800 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 436 transitions. [2021-05-21 20:44:04,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,800 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 436 transitions. [2021-05-21 20:44:04,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:04,800 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:04,800 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:04,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2021-05-21 20:44:04,801 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1975020344, now seen corresponding path program 17 times [2021-05-21 20:44:04,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:04,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555568274] [2021-05-21 20:44:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:04,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:04,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555568274] [2021-05-21 20:44:04,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555568274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:04,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162767198] [2021-05-21 20:44:04,836 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 [2021-05-21 20:44:04,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:04,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:04,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:04,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:04,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162767198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:04,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:04,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:04,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854983064] [2021-05-21 20:44:04,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:04,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:04,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:04,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:04,914 INFO L87 Difference]: Start difference. First operand 145 states and 436 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:04,994 INFO L93 Difference]: Finished difference Result 260 states and 749 transitions. [2021-05-21 20:44:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:04,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:04,995 INFO L225 Difference]: With dead ends: 260 [2021-05-21 20:44:04,995 INFO L226 Difference]: Without dead ends: 260 [2021-05-21 20:44:04,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-21 20:44:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 152. [2021-05-21 20:44:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0927152317880795) internal successors, (467), 151 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 467 transitions. [2021-05-21 20:44:04,997 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 467 transitions. Word has length 16 [2021-05-21 20:44:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:04,997 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 467 transitions. [2021-05-21 20:44:04,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 467 transitions. [2021-05-21 20:44:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:04,998 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:04,998 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:05,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-05-21 20:44:05,201 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:05,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1124910778, now seen corresponding path program 19 times [2021-05-21 20:44:05,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:05,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584569805] [2021-05-21 20:44:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:05,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:05,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584569805] [2021-05-21 20:44:05,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584569805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:05,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216677418] [2021-05-21 20:44:05,228 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 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 [2021-05-21 20:44:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:05,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:05,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:05,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216677418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:05,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:05,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:05,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229807894] [2021-05-21 20:44:05,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:05,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:05,292 INFO L87 Difference]: Start difference. First operand 152 states and 467 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:05,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:05,373 INFO L93 Difference]: Finished difference Result 273 states and 794 transitions. [2021-05-21 20:44:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:05,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:05,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:05,373 INFO L225 Difference]: With dead ends: 273 [2021-05-21 20:44:05,374 INFO L226 Difference]: Without dead ends: 269 [2021-05-21 20:44:05,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:05,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-21 20:44:05,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 163. [2021-05-21 20:44:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.1049382716049383) internal successors, (503), 162 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 503 transitions. [2021-05-21 20:44:05,376 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 503 transitions. Word has length 16 [2021-05-21 20:44:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:05,376 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 503 transitions. [2021-05-21 20:44:05,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 503 transitions. [2021-05-21 20:44:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:05,377 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:05,377 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:05,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-05-21 20:44:05,577 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:05,578 INFO L82 PathProgramCache]: Analyzing trace with hash 304044328, now seen corresponding path program 18 times [2021-05-21 20:44:05,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:05,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290934004] [2021-05-21 20:44:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:05,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:05,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290934004] [2021-05-21 20:44:05,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290934004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:05,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844856708] [2021-05-21 20:44:05,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:05,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:05,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:05,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:05,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:05,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844856708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:05,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:05,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:05,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114421960] [2021-05-21 20:44:05,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:05,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:05,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:05,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:05,699 INFO L87 Difference]: Start difference. First operand 163 states and 503 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:05,771 INFO L93 Difference]: Finished difference Result 263 states and 760 transitions. [2021-05-21 20:44:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:05,771 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:05,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:05,772 INFO L225 Difference]: With dead ends: 263 [2021-05-21 20:44:05,772 INFO L226 Difference]: Without dead ends: 260 [2021-05-21 20:44:05,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-21 20:44:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 163. [2021-05-21 20:44:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.0864197530864197) internal successors, (500), 162 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 500 transitions. [2021-05-21 20:44:05,774 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 500 transitions. Word has length 16 [2021-05-21 20:44:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:05,775 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 500 transitions. [2021-05-21 20:44:05,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 500 transitions. [2021-05-21 20:44:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:05,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:05,775 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:05,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:05,976 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:05,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1230067772, now seen corresponding path program 20 times [2021-05-21 20:44:05,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:05,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898707131] [2021-05-21 20:44:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:06,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:06,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898707131] [2021-05-21 20:44:06,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898707131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:06,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816454933] [2021-05-21 20:44:06,012 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 [2021-05-21 20:44:06,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:06,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:06,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:06,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816454933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:06,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:06,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:06,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783743656] [2021-05-21 20:44:06,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:06,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:06,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:06,076 INFO L87 Difference]: Start difference. First operand 163 states and 500 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:06,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:06,153 INFO L93 Difference]: Finished difference Result 281 states and 820 transitions. [2021-05-21 20:44:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:06,154 INFO L225 Difference]: With dead ends: 281 [2021-05-21 20:44:06,154 INFO L226 Difference]: Without dead ends: 281 [2021-05-21 20:44:06,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-21 20:44:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 160. [2021-05-21 20:44:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.088050314465409) internal successors, (491), 159 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 491 transitions. [2021-05-21 20:44:06,156 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 491 transitions. Word has length 16 [2021-05-21 20:44:06,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:06,156 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 491 transitions. [2021-05-21 20:44:06,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:06,156 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 491 transitions. [2021-05-21 20:44:06,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:06,157 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:06,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:06,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:06,357 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:06,357 INFO L82 PathProgramCache]: Analyzing trace with hash -569696352, now seen corresponding path program 19 times [2021-05-21 20:44:06,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:06,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649377249] [2021-05-21 20:44:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:06,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:06,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649377249] [2021-05-21 20:44:06,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649377249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:06,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374164281] [2021-05-21 20:44:06,390 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 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 [2021-05-21 20:44:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:06,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374164281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:06,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:06,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:06,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988456850] [2021-05-21 20:44:06,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:06,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:06,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:06,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:06,463 INFO L87 Difference]: Start difference. First operand 160 states and 491 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:06,531 INFO L93 Difference]: Finished difference Result 253 states and 725 transitions. [2021-05-21 20:44:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:06,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:06,532 INFO L225 Difference]: With dead ends: 253 [2021-05-21 20:44:06,532 INFO L226 Difference]: Without dead ends: 247 [2021-05-21 20:44:06,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-21 20:44:06,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 160. [2021-05-21 20:44:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.069182389937107) internal successors, (488), 159 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 488 transitions. [2021-05-21 20:44:06,535 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 488 transitions. Word has length 16 [2021-05-21 20:44:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:06,535 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 488 transitions. [2021-05-21 20:44:06,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 488 transitions. [2021-05-21 20:44:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:06,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:06,535 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:06,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:06,737 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1211633746, now seen corresponding path program 21 times [2021-05-21 20:44:06,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:06,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27242953] [2021-05-21 20:44:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:06,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:06,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27242953] [2021-05-21 20:44:06,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27242953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:06,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293090150] [2021-05-21 20:44:06,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:06,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:44:06,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:06,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:06,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:06,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293090150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:06,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:06,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:44:06,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521738258] [2021-05-21 20:44:06,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:44:06,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:06,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:44:06,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:44:06,827 INFO L87 Difference]: Start difference. First operand 160 states and 488 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:06,904 INFO L93 Difference]: Finished difference Result 294 states and 862 transitions. [2021-05-21 20:44:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:06,905 INFO L225 Difference]: With dead ends: 294 [2021-05-21 20:44:06,905 INFO L226 Difference]: Without dead ends: 294 [2021-05-21 20:44:06,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-21 20:44:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 157. [2021-05-21 20:44:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 3.0705128205128207) internal successors, (479), 156 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 479 transitions. [2021-05-21 20:44:06,908 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 479 transitions. Word has length 16 [2021-05-21 20:44:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:06,908 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 479 transitions. [2021-05-21 20:44:06,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 479 transitions. [2021-05-21 20:44:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:06,908 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:06,908 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:07,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-05-21 20:44:07,109 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:07,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1044998274, now seen corresponding path program 20 times [2021-05-21 20:44:07,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:07,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944977936] [2021-05-21 20:44:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:07,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944977936] [2021-05-21 20:44:07,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944977936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031563371] [2021-05-21 20:44:07,155 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 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 [2021-05-21 20:44:07,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:07,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:07,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:07,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:07,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031563371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:07,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:07,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-21 20:44:07,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389294801] [2021-05-21 20:44:07,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:44:07,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:07,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:44:07,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:07,268 INFO L87 Difference]: Start difference. First operand 157 states and 479 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:07,495 INFO L93 Difference]: Finished difference Result 282 states and 801 transitions. [2021-05-21 20:44:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:07,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:07,496 INFO L225 Difference]: With dead ends: 282 [2021-05-21 20:44:07,496 INFO L226 Difference]: Without dead ends: 282 [2021-05-21 20:44:07,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:44:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-21 20:44:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 165. [2021-05-21 20:44:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.1646341463414633) internal successors, (519), 164 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 519 transitions. [2021-05-21 20:44:07,498 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 519 transitions. Word has length 16 [2021-05-21 20:44:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:07,498 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 519 transitions. [2021-05-21 20:44:07,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 519 transitions. [2021-05-21 20:44:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:07,499 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:07,499 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:07,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-05-21 20:44:07,699 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:07,700 INFO L82 PathProgramCache]: Analyzing trace with hash 150037900, now seen corresponding path program 22 times [2021-05-21 20:44:07,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:07,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444824856] [2021-05-21 20:44:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:07,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:07,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444824856] [2021-05-21 20:44:07,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444824856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:07,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277967405] [2021-05-21 20:44:07,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:44:07,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:07,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:07,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:07,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277967405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:07,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:07,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:07,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757683793] [2021-05-21 20:44:07,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:07,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:07,807 INFO L87 Difference]: Start difference. First operand 165 states and 519 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:07,875 INFO L93 Difference]: Finished difference Result 288 states and 815 transitions. [2021-05-21 20:44:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:07,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:07,875 INFO L225 Difference]: With dead ends: 288 [2021-05-21 20:44:07,875 INFO L226 Difference]: Without dead ends: 284 [2021-05-21 20:44:07,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-21 20:44:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 169. [2021-05-21 20:44:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.1904761904761907) internal successors, (536), 168 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 536 transitions. [2021-05-21 20:44:07,878 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 536 transitions. Word has length 16 [2021-05-21 20:44:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:07,878 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 536 transitions. [2021-05-21 20:44:07,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 536 transitions. [2021-05-21 20:44:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:07,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:07,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:08,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:08,079 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:08,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:08,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1578993006, now seen corresponding path program 21 times [2021-05-21 20:44:08,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:08,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930632723] [2021-05-21 20:44:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:08,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:08,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930632723] [2021-05-21 20:44:08,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930632723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:08,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654372071] [2021-05-21 20:44:08,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:44:08,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:44:08,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:08,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:08,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654372071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:08,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:08,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-21 20:44:08,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609630653] [2021-05-21 20:44:08,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:44:08,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:08,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:44:08,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:08,219 INFO L87 Difference]: Start difference. First operand 169 states and 536 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:08,384 INFO L93 Difference]: Finished difference Result 275 states and 778 transitions. [2021-05-21 20:44:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:08,385 INFO L225 Difference]: With dead ends: 275 [2021-05-21 20:44:08,385 INFO L226 Difference]: Without dead ends: 272 [2021-05-21 20:44:08,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:44:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-21 20:44:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 172. [2021-05-21 20:44:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 3.152046783625731) internal successors, (539), 171 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 539 transitions. [2021-05-21 20:44:08,388 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 539 transitions. Word has length 16 [2021-05-21 20:44:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:08,388 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 539 transitions. [2021-05-21 20:44:08,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 539 transitions. [2021-05-21 20:44:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:08,388 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:08,388 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:08,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:08,593 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:08,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:08,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1789950846, now seen corresponding path program 23 times [2021-05-21 20:44:08,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:08,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960431842] [2021-05-21 20:44:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:08,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:08,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960431842] [2021-05-21 20:44:08,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960431842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:08,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432424112] [2021-05-21 20:44:08,623 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 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 [2021-05-21 20:44:08,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:08,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:08,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:08,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432424112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:08,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:08,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:08,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712660484] [2021-05-21 20:44:08,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:08,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:08,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:08,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:08,692 INFO L87 Difference]: Start difference. First operand 172 states and 539 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:08,763 INFO L93 Difference]: Finished difference Result 295 states and 843 transitions. [2021-05-21 20:44:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:08,764 INFO L225 Difference]: With dead ends: 295 [2021-05-21 20:44:08,764 INFO L226 Difference]: Without dead ends: 295 [2021-05-21 20:44:08,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-21 20:44:08,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 166. [2021-05-21 20:44:08,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.121212121212121) internal successors, (515), 165 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 515 transitions. [2021-05-21 20:44:08,766 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 515 transitions. Word has length 16 [2021-05-21 20:44:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:08,766 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 515 transitions. [2021-05-21 20:44:08,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 515 transitions. [2021-05-21 20:44:08,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:08,767 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:08,767 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:08,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:08,967 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:08,968 INFO L82 PathProgramCache]: Analyzing trace with hash -702414762, now seen corresponding path program 22 times [2021-05-21 20:44:08,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:08,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267148116] [2021-05-21 20:44:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:08,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:08,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267148116] [2021-05-21 20:44:08,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267148116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:08,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769284922] [2021-05-21 20:44:08,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:44:09,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:09,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:09,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:09,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:09,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769284922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:09,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:09,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:09,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986036470] [2021-05-21 20:44:09,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:09,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:09,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:09,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:09,080 INFO L87 Difference]: Start difference. First operand 166 states and 515 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:09,165 INFO L93 Difference]: Finished difference Result 254 states and 721 transitions. [2021-05-21 20:44:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:09,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:09,166 INFO L225 Difference]: With dead ends: 254 [2021-05-21 20:44:09,166 INFO L226 Difference]: Without dead ends: 254 [2021-05-21 20:44:09,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-21 20:44:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 161. [2021-05-21 20:44:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.10625) internal successors, (497), 160 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 497 transitions. [2021-05-21 20:44:09,169 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 497 transitions. Word has length 16 [2021-05-21 20:44:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:09,169 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 497 transitions. [2021-05-21 20:44:09,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 497 transitions. [2021-05-21 20:44:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:09,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:09,169 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:09,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:09,385 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1269298592, now seen corresponding path program 23 times [2021-05-21 20:44:09,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:09,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488341449] [2021-05-21 20:44:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:09,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:09,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488341449] [2021-05-21 20:44:09,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488341449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:09,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785196060] [2021-05-21 20:44:09,413 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 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 [2021-05-21 20:44:09,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:09,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:09,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:09,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:09,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785196060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:09,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:09,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:09,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722239672] [2021-05-21 20:44:09,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:09,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:09,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:09,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:09,498 INFO L87 Difference]: Start difference. First operand 161 states and 497 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:09,582 INFO L93 Difference]: Finished difference Result 232 states and 667 transitions. [2021-05-21 20:44:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:09,583 INFO L225 Difference]: With dead ends: 232 [2021-05-21 20:44:09,583 INFO L226 Difference]: Without dead ends: 230 [2021-05-21 20:44:09,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-21 20:44:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 159. [2021-05-21 20:44:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0949367088607596) internal successors, (489), 158 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 489 transitions. [2021-05-21 20:44:09,586 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 489 transitions. Word has length 16 [2021-05-21 20:44:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:09,586 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 489 transitions. [2021-05-21 20:44:09,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,586 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 489 transitions. [2021-05-21 20:44:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:09,586 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:09,586 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:09,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-05-21 20:44:09,787 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash -591395774, now seen corresponding path program 24 times [2021-05-21 20:44:09,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:09,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849864849] [2021-05-21 20:44:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:09,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849864849] [2021-05-21 20:44:09,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849864849] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:09,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:09,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:09,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832806341] [2021-05-21 20:44:09,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:09,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:09,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:09,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:09,813 INFO L87 Difference]: Start difference. First operand 159 states and 489 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:09,883 INFO L93 Difference]: Finished difference Result 244 states and 679 transitions. [2021-05-21 20:44:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:09,884 INFO L225 Difference]: With dead ends: 244 [2021-05-21 20:44:09,884 INFO L226 Difference]: Without dead ends: 240 [2021-05-21 20:44:09,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:09,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-21 20:44:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 161. [2021-05-21 20:44:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.08125) internal successors, (493), 160 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 493 transitions. [2021-05-21 20:44:09,886 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 493 transitions. Word has length 16 [2021-05-21 20:44:09,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:09,886 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 493 transitions. [2021-05-21 20:44:09,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 493 transitions. [2021-05-21 20:44:09,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:09,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:09,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:09,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2021-05-21 20:44:09,887 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:09,887 INFO L82 PathProgramCache]: Analyzing trace with hash -664768254, now seen corresponding path program 25 times [2021-05-21 20:44:09,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:09,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055465962] [2021-05-21 20:44:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:09,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:09,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055465962] [2021-05-21 20:44:09,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055465962] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:09,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:09,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:09,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410015093] [2021-05-21 20:44:09,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:09,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:09,912 INFO L87 Difference]: Start difference. First operand 161 states and 493 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:09,979 INFO L93 Difference]: Finished difference Result 227 states and 653 transitions. [2021-05-21 20:44:09,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:09,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:09,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:09,980 INFO L225 Difference]: With dead ends: 227 [2021-05-21 20:44:09,980 INFO L226 Difference]: Without dead ends: 224 [2021-05-21 20:44:09,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-21 20:44:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 160. [2021-05-21 20:44:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0817610062893084) internal successors, (490), 159 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 490 transitions. [2021-05-21 20:44:09,982 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 490 transitions. Word has length 16 [2021-05-21 20:44:09,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:09,982 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 490 transitions. [2021-05-21 20:44:09,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 490 transitions. [2021-05-21 20:44:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:09,982 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:09,982 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:09,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2021-05-21 20:44:09,983 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:09,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:09,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1330475040, now seen corresponding path program 24 times [2021-05-21 20:44:09,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:09,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059873294] [2021-05-21 20:44:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:10,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:10,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059873294] [2021-05-21 20:44:10,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059873294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:10,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:10,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:10,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257960702] [2021-05-21 20:44:10,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:10,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:10,011 INFO L87 Difference]: Start difference. First operand 160 states and 490 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:10,105 INFO L93 Difference]: Finished difference Result 242 states and 676 transitions. [2021-05-21 20:44:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:10,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:10,105 INFO L225 Difference]: With dead ends: 242 [2021-05-21 20:44:10,105 INFO L226 Difference]: Without dead ends: 239 [2021-05-21 20:44:10,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-21 20:44:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 165. [2021-05-21 20:44:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.048780487804878) internal successors, (500), 164 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 500 transitions. [2021-05-21 20:44:10,108 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 500 transitions. Word has length 16 [2021-05-21 20:44:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:10,108 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 500 transitions. [2021-05-21 20:44:10,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 500 transitions. [2021-05-21 20:44:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:10,108 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:10,109 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:10,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2021-05-21 20:44:10,109 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1867164680, now seen corresponding path program 25 times [2021-05-21 20:44:10,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:10,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534880047] [2021-05-21 20:44:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:10,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:10,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534880047] [2021-05-21 20:44:10,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534880047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:10,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:10,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:10,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876030732] [2021-05-21 20:44:10,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:10,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:10,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:10,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:10,137 INFO L87 Difference]: Start difference. First operand 165 states and 500 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:10,221 INFO L93 Difference]: Finished difference Result 229 states and 657 transitions. [2021-05-21 20:44:10,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:10,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:10,222 INFO L225 Difference]: With dead ends: 229 [2021-05-21 20:44:10,222 INFO L226 Difference]: Without dead ends: 226 [2021-05-21 20:44:10,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-21 20:44:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 160. [2021-05-21 20:44:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0754716981132075) internal successors, (489), 159 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 489 transitions. [2021-05-21 20:44:10,224 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 489 transitions. Word has length 16 [2021-05-21 20:44:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:10,224 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 489 transitions. [2021-05-21 20:44:10,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 489 transitions. [2021-05-21 20:44:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:10,224 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:10,224 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:10,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2021-05-21 20:44:10,225 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:10,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1488468782, now seen corresponding path program 26 times [2021-05-21 20:44:10,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:10,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275048700] [2021-05-21 20:44:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:10,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:10,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275048700] [2021-05-21 20:44:10,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275048700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:10,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493423723] [2021-05-21 20:44:10,260 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 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 [2021-05-21 20:44:10,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:10,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:10,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:10,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493423723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:10,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:10,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:10,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166770419] [2021-05-21 20:44:10,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:10,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:10,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:10,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:10,329 INFO L87 Difference]: Start difference. First operand 160 states and 489 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:10,414 INFO L93 Difference]: Finished difference Result 257 states and 727 transitions. [2021-05-21 20:44:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:10,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:10,415 INFO L225 Difference]: With dead ends: 257 [2021-05-21 20:44:10,415 INFO L226 Difference]: Without dead ends: 257 [2021-05-21 20:44:10,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-21 20:44:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 162. [2021-05-21 20:44:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.0869565217391304) internal successors, (497), 161 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 497 transitions. [2021-05-21 20:44:10,417 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 497 transitions. Word has length 16 [2021-05-21 20:44:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:10,417 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 497 transitions. [2021-05-21 20:44:10,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 497 transitions. [2021-05-21 20:44:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:10,418 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:10,418 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:10,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:10,621 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:10,621 INFO L82 PathProgramCache]: Analyzing trace with hash -126912676, now seen corresponding path program 27 times [2021-05-21 20:44:10,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:10,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638553744] [2021-05-21 20:44:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:10,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:10,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638553744] [2021-05-21 20:44:10,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638553744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:10,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:10,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:10,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630214260] [2021-05-21 20:44:10,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:10,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:10,647 INFO L87 Difference]: Start difference. First operand 162 states and 497 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:10,722 INFO L93 Difference]: Finished difference Result 234 states and 674 transitions. [2021-05-21 20:44:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:10,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:10,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:10,722 INFO L225 Difference]: With dead ends: 234 [2021-05-21 20:44:10,722 INFO L226 Difference]: Without dead ends: 232 [2021-05-21 20:44:10,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-21 20:44:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 159. [2021-05-21 20:44:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0759493670886076) internal successors, (486), 158 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 486 transitions. [2021-05-21 20:44:10,725 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 486 transitions. Word has length 16 [2021-05-21 20:44:10,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:10,725 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 486 transitions. [2021-05-21 20:44:10,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 486 transitions. [2021-05-21 20:44:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:10,725 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:10,725 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:10,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2021-05-21 20:44:10,725 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:10,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:10,726 INFO L82 PathProgramCache]: Analyzing trace with hash -568892562, now seen corresponding path program 26 times [2021-05-21 20:44:10,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:10,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547629792] [2021-05-21 20:44:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:10,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:10,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547629792] [2021-05-21 20:44:10,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547629792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:10,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:10,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:10,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854829716] [2021-05-21 20:44:10,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:10,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:10,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:10,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:10,752 INFO L87 Difference]: Start difference. First operand 159 states and 486 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:10,836 INFO L93 Difference]: Finished difference Result 213 states and 612 transitions. [2021-05-21 20:44:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:10,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:10,837 INFO L225 Difference]: With dead ends: 213 [2021-05-21 20:44:10,837 INFO L226 Difference]: Without dead ends: 207 [2021-05-21 20:44:10,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-21 20:44:10,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 160. [2021-05-21 20:44:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0628930817610063) internal successors, (487), 159 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 487 transitions. [2021-05-21 20:44:10,839 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 487 transitions. Word has length 16 [2021-05-21 20:44:10,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:10,839 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 487 transitions. [2021-05-21 20:44:10,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 487 transitions. [2021-05-21 20:44:10,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:10,840 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:10,840 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:10,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2021-05-21 20:44:10,840 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:10,840 INFO L82 PathProgramCache]: Analyzing trace with hash 857708136, now seen corresponding path program 27 times [2021-05-21 20:44:10,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:10,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196607522] [2021-05-21 20:44:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:10,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:10,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196607522] [2021-05-21 20:44:10,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196607522] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:10,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:10,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078782559] [2021-05-21 20:44:10,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:10,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:10,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:10,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:10,869 INFO L87 Difference]: Start difference. First operand 160 states and 487 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:10,964 INFO L93 Difference]: Finished difference Result 210 states and 602 transitions. [2021-05-21 20:44:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:10,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:10,964 INFO L225 Difference]: With dead ends: 210 [2021-05-21 20:44:10,964 INFO L226 Difference]: Without dead ends: 207 [2021-05-21 20:44:10,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:10,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-21 20:44:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 165. [2021-05-21 20:44:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.0304878048780486) internal successors, (497), 164 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 497 transitions. [2021-05-21 20:44:10,973 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 497 transitions. Word has length 16 [2021-05-21 20:44:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:10,973 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 497 transitions. [2021-05-21 20:44:10,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 497 transitions. [2021-05-21 20:44:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:10,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:10,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:10,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2021-05-21 20:44:10,973 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash -239619440, now seen corresponding path program 28 times [2021-05-21 20:44:10,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:10,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182395499] [2021-05-21 20:44:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:11,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:11,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182395499] [2021-05-21 20:44:11,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182395499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:11,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:11,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:11,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143127158] [2021-05-21 20:44:11,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:11,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:11,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:11,006 INFO L87 Difference]: Start difference. First operand 165 states and 497 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:11,105 INFO L93 Difference]: Finished difference Result 197 states and 583 transitions. [2021-05-21 20:44:11,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:11,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:11,106 INFO L225 Difference]: With dead ends: 197 [2021-05-21 20:44:11,106 INFO L226 Difference]: Without dead ends: 193 [2021-05-21 20:44:11,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-21 20:44:11,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 159. [2021-05-21 20:44:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.069620253164557) internal successors, (485), 158 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 485 transitions. [2021-05-21 20:44:11,108 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 485 transitions. Word has length 16 [2021-05-21 20:44:11,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:11,108 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 485 transitions. [2021-05-21 20:44:11,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,108 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 485 transitions. [2021-05-21 20:44:11,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:11,110 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:11,110 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:11,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2021-05-21 20:44:11,110 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1967643138, now seen corresponding path program 28 times [2021-05-21 20:44:11,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:11,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710721185] [2021-05-21 20:44:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:44:11,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:11,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710721185] [2021-05-21 20:44:11,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710721185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:11,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327366942] [2021-05-21 20:44:11,160 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 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 [2021-05-21 20:44:11,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:11,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:11,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:11,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:11,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327366942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:11,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:11,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:44:11,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258929782] [2021-05-21 20:44:11,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:11,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:11,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:11,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:11,241 INFO L87 Difference]: Start difference. First operand 159 states and 485 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:11,584 INFO L93 Difference]: Finished difference Result 288 states and 829 transitions. [2021-05-21 20:44:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:44:11,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:11,585 INFO L225 Difference]: With dead ends: 288 [2021-05-21 20:44:11,585 INFO L226 Difference]: Without dead ends: 277 [2021-05-21 20:44:11,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:44:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-21 20:44:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 147. [2021-05-21 20:44:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.0342465753424657) internal successors, (443), 146 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 443 transitions. [2021-05-21 20:44:11,588 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 443 transitions. Word has length 16 [2021-05-21 20:44:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:11,589 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 443 transitions. [2021-05-21 20:44:11,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 443 transitions. [2021-05-21 20:44:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:11,589 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:11,589 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:11,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-05-21 20:44:11,805 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:11,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1038652820, now seen corresponding path program 29 times [2021-05-21 20:44:11,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:11,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882264031] [2021-05-21 20:44:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:11,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:11,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882264031] [2021-05-21 20:44:11,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882264031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:11,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381121515] [2021-05-21 20:44:11,831 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 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 [2021-05-21 20:44:11,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:11,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:11,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381121515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:11,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:11,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:44:11,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942999953] [2021-05-21 20:44:11,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:44:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:44:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:44:11,889 INFO L87 Difference]: Start difference. First operand 147 states and 443 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:11,960 INFO L93 Difference]: Finished difference Result 224 states and 647 transitions. [2021-05-21 20:44:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:11,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:11,961 INFO L225 Difference]: With dead ends: 224 [2021-05-21 20:44:11,961 INFO L226 Difference]: Without dead ends: 224 [2021-05-21 20:44:11,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-21 20:44:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 147. [2021-05-21 20:44:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.0342465753424657) internal successors, (443), 146 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 443 transitions. [2021-05-21 20:44:11,963 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 443 transitions. Word has length 16 [2021-05-21 20:44:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:11,963 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 443 transitions. [2021-05-21 20:44:11,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 443 transitions. [2021-05-21 20:44:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:11,964 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:11,964 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:12,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-05-21 20:44:12,164 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:12,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1592318946, now seen corresponding path program 29 times [2021-05-21 20:44:12,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:12,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300970536] [2021-05-21 20:44:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:12,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:12,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300970536] [2021-05-21 20:44:12,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300970536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:12,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344754505] [2021-05-21 20:44:12,190 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 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 [2021-05-21 20:44:12,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:12,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:12,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:12,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344754505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:12,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:12,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:12,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10909481] [2021-05-21 20:44:12,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:12,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:12,258 INFO L87 Difference]: Start difference. First operand 147 states and 443 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:12,320 INFO L93 Difference]: Finished difference Result 244 states and 672 transitions. [2021-05-21 20:44:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:12,321 INFO L225 Difference]: With dead ends: 244 [2021-05-21 20:44:12,321 INFO L226 Difference]: Without dead ends: 234 [2021-05-21 20:44:12,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-21 20:44:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 147. [2021-05-21 20:44:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.0) internal successors, (438), 146 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 438 transitions. [2021-05-21 20:44:12,323 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 438 transitions. Word has length 16 [2021-05-21 20:44:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:12,323 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 438 transitions. [2021-05-21 20:44:12,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 438 transitions. [2021-05-21 20:44:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:12,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:12,324 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:12,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-05-21 20:44:12,524 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1253778718, now seen corresponding path program 30 times [2021-05-21 20:44:12,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:12,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085080467] [2021-05-21 20:44:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:12,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:12,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085080467] [2021-05-21 20:44:12,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085080467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:12,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450204798] [2021-05-21 20:44:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:44:12,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:12,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:12,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:12,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:12,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450204798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:12,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:12,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:12,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754250277] [2021-05-21 20:44:12,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:12,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:12,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:12,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:12,616 INFO L87 Difference]: Start difference. First operand 147 states and 438 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:12,699 INFO L93 Difference]: Finished difference Result 248 states and 707 transitions. [2021-05-21 20:44:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:12,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:12,700 INFO L225 Difference]: With dead ends: 248 [2021-05-21 20:44:12,700 INFO L226 Difference]: Without dead ends: 248 [2021-05-21 20:44:12,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-21 20:44:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 153. [2021-05-21 20:44:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.0789473684210527) internal successors, (468), 152 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 468 transitions. [2021-05-21 20:44:12,702 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 468 transitions. Word has length 16 [2021-05-21 20:44:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:12,702 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 468 transitions. [2021-05-21 20:44:12,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 468 transitions. [2021-05-21 20:44:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:12,702 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:12,702 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:12,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:12,903 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:12,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1846152404, now seen corresponding path program 30 times [2021-05-21 20:44:12,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:12,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589766115] [2021-05-21 20:44:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:12,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:12,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589766115] [2021-05-21 20:44:12,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589766115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:12,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724190082] [2021-05-21 20:44:12,937 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 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 [2021-05-21 20:44:12,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:12,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:12,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:12,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:13,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724190082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:13,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:13,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:13,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253326467] [2021-05-21 20:44:13,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:13,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:13,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:13,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:13,030 INFO L87 Difference]: Start difference. First operand 153 states and 468 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:13,103 INFO L93 Difference]: Finished difference Result 264 states and 730 transitions. [2021-05-21 20:44:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:13,104 INFO L225 Difference]: With dead ends: 264 [2021-05-21 20:44:13,104 INFO L226 Difference]: Without dead ends: 260 [2021-05-21 20:44:13,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-21 20:44:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 160. [2021-05-21 20:44:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.069182389937107) internal successors, (488), 159 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 488 transitions. [2021-05-21 20:44:13,106 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 488 transitions. Word has length 16 [2021-05-21 20:44:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:13,107 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 488 transitions. [2021-05-21 20:44:13,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 488 transitions. [2021-05-21 20:44:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:13,107 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:13,107 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:13,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:13,307 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:13,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:13,308 INFO L82 PathProgramCache]: Analyzing trace with hash -417197298, now seen corresponding path program 31 times [2021-05-21 20:44:13,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:13,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594404208] [2021-05-21 20:44:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:13,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:13,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594404208] [2021-05-21 20:44:13,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594404208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:13,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979184413] [2021-05-21 20:44:13,333 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:44:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:13,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:13,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:13,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979184413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:13,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:13,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:13,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941653256] [2021-05-21 20:44:13,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:13,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:13,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:13,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:13,398 INFO L87 Difference]: Start difference. First operand 160 states and 488 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:13,470 INFO L93 Difference]: Finished difference Result 231 states and 665 transitions. [2021-05-21 20:44:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:13,471 INFO L225 Difference]: With dead ends: 231 [2021-05-21 20:44:13,471 INFO L226 Difference]: Without dead ends: 228 [2021-05-21 20:44:13,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:13,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-21 20:44:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 163. [2021-05-21 20:44:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.0308641975308643) internal successors, (491), 162 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 491 transitions. [2021-05-21 20:44:13,473 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 491 transitions. Word has length 16 [2021-05-21 20:44:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:13,473 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 491 transitions. [2021-05-21 20:44:13,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 491 transitions. [2021-05-21 20:44:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:13,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:13,474 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:13,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:13,690 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:13,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:13,690 INFO L82 PathProgramCache]: Analyzing trace with hash 508826146, now seen corresponding path program 31 times [2021-05-21 20:44:13,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:13,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598763941] [2021-05-21 20:44:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:13,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:13,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598763941] [2021-05-21 20:44:13,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598763941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:13,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309643728] [2021-05-21 20:44:13,720 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:13,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:13,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:13,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309643728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:13,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:13,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:13,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755871990] [2021-05-21 20:44:13,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:13,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:13,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:13,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:13,801 INFO L87 Difference]: Start difference. First operand 163 states and 491 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:13,877 INFO L93 Difference]: Finished difference Result 249 states and 699 transitions. [2021-05-21 20:44:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:13,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:13,878 INFO L225 Difference]: With dead ends: 249 [2021-05-21 20:44:13,878 INFO L226 Difference]: Without dead ends: 249 [2021-05-21 20:44:13,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-21 20:44:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 148. [2021-05-21 20:44:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.020408163265306) internal successors, (444), 147 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 444 transitions. [2021-05-21 20:44:13,880 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 444 transitions. Word has length 16 [2021-05-21 20:44:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:13,880 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 444 transitions. [2021-05-21 20:44:13,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:13,880 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 444 transitions. [2021-05-21 20:44:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:13,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:13,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:14,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:14,081 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:14,081 INFO L82 PathProgramCache]: Analyzing trace with hash 991501460, now seen corresponding path program 32 times [2021-05-21 20:44:14,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:14,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884207477] [2021-05-21 20:44:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:14,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:14,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884207477] [2021-05-21 20:44:14,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884207477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:14,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668726481] [2021-05-21 20:44:14,110 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:14,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:14,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:14,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:14,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:14,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668726481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:14,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:14,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:44:14,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890963794] [2021-05-21 20:44:14,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:44:14,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:14,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:44:14,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:44:14,172 INFO L87 Difference]: Start difference. First operand 148 states and 444 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:14,258 INFO L93 Difference]: Finished difference Result 304 states and 875 transitions. [2021-05-21 20:44:14,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:14,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:14,259 INFO L225 Difference]: With dead ends: 304 [2021-05-21 20:44:14,259 INFO L226 Difference]: Without dead ends: 304 [2021-05-21 20:44:14,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-21 20:44:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 152. [2021-05-21 20:44:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.019867549668874) internal successors, (456), 151 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 456 transitions. [2021-05-21 20:44:14,261 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 456 transitions. Word has length 16 [2021-05-21 20:44:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:14,261 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 456 transitions. [2021-05-21 20:44:14,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 456 transitions. [2021-05-21 20:44:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:14,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:14,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:14,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-05-21 20:44:14,477 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash -501516022, now seen corresponding path program 33 times [2021-05-21 20:44:14,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:14,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645349871] [2021-05-21 20:44:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:14,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:14,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645349871] [2021-05-21 20:44:14,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645349871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:14,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693143443] [2021-05-21 20:44:14,505 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:14,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:44:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:14,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:14,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693143443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:14,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:14,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:14,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179801449] [2021-05-21 20:44:14,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:14,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:14,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:14,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:14,576 INFO L87 Difference]: Start difference. First operand 152 states and 456 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:14,665 INFO L93 Difference]: Finished difference Result 279 states and 796 transitions. [2021-05-21 20:44:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:14,666 INFO L225 Difference]: With dead ends: 279 [2021-05-21 20:44:14,666 INFO L226 Difference]: Without dead ends: 279 [2021-05-21 20:44:14,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:14,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-21 20:44:14,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 154. [2021-05-21 20:44:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.0326797385620914) internal successors, (464), 153 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 464 transitions. [2021-05-21 20:44:14,668 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 464 transitions. Word has length 16 [2021-05-21 20:44:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:14,668 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 464 transitions. [2021-05-21 20:44:14,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 464 transitions. [2021-05-21 20:44:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:14,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:14,669 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:14,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:14,869 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash 108641226, now seen corresponding path program 34 times [2021-05-21 20:44:14,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:14,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617510771] [2021-05-21 20:44:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:14,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:14,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617510771] [2021-05-21 20:44:14,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617510771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:14,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879164459] [2021-05-21 20:44:14,894 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:14,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:14,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:14,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879164459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:14,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:14,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:14,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275277797] [2021-05-21 20:44:14,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:14,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:14,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:14,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:14,959 INFO L87 Difference]: Start difference. First operand 154 states and 464 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:15,029 INFO L93 Difference]: Finished difference Result 255 states and 738 transitions. [2021-05-21 20:44:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:15,030 INFO L225 Difference]: With dead ends: 255 [2021-05-21 20:44:15,030 INFO L226 Difference]: Without dead ends: 253 [2021-05-21 20:44:15,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-21 20:44:15,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 148. [2021-05-21 20:44:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.020408163265306) internal successors, (444), 147 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 444 transitions. [2021-05-21 20:44:15,032 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 444 transitions. Word has length 16 [2021-05-21 20:44:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:15,032 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 444 transitions. [2021-05-21 20:44:15,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,032 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 444 transitions. [2021-05-21 20:44:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:15,033 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:15,033 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:15,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-05-21 20:44:15,233 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash 82711532, now seen corresponding path program 32 times [2021-05-21 20:44:15,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:15,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489408868] [2021-05-21 20:44:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:15,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:15,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489408868] [2021-05-21 20:44:15,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489408868] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:15,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:15,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:15,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181504615] [2021-05-21 20:44:15,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:15,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:15,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:15,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:15,270 INFO L87 Difference]: Start difference. First operand 148 states and 444 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:15,343 INFO L93 Difference]: Finished difference Result 276 states and 746 transitions. [2021-05-21 20:44:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:15,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:15,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:15,344 INFO L225 Difference]: With dead ends: 276 [2021-05-21 20:44:15,344 INFO L226 Difference]: Without dead ends: 266 [2021-05-21 20:44:15,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-21 20:44:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-05-21 20:44:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.9932885906040267) internal successors, (446), 149 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 446 transitions. [2021-05-21 20:44:15,346 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 446 transitions. Word has length 16 [2021-05-21 20:44:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:15,346 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 446 transitions. [2021-05-21 20:44:15,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 446 transitions. [2021-05-21 20:44:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:15,346 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:15,346 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:15,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2021-05-21 20:44:15,347 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:15,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1741550036, now seen corresponding path program 33 times [2021-05-21 20:44:15,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:15,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478518575] [2021-05-21 20:44:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:15,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:15,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478518575] [2021-05-21 20:44:15,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478518575] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:15,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:15,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:15,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487627218] [2021-05-21 20:44:15,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:15,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:15,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:15,374 INFO L87 Difference]: Start difference. First operand 150 states and 446 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:15,440 INFO L93 Difference]: Finished difference Result 269 states and 726 transitions. [2021-05-21 20:44:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:15,441 INFO L225 Difference]: With dead ends: 269 [2021-05-21 20:44:15,441 INFO L226 Difference]: Without dead ends: 265 [2021-05-21 20:44:15,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-21 20:44:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 156. [2021-05-21 20:44:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9548387096774196) internal successors, (458), 155 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 458 transitions. [2021-05-21 20:44:15,443 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 458 transitions. Word has length 16 [2021-05-21 20:44:15,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:15,443 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 458 transitions. [2021-05-21 20:44:15,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,443 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 458 transitions. [2021-05-21 20:44:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:15,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:15,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:15,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2021-05-21 20:44:15,444 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:15,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1814922516, now seen corresponding path program 34 times [2021-05-21 20:44:15,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:15,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234409243] [2021-05-21 20:44:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:15,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:15,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234409243] [2021-05-21 20:44:15,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234409243] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:15,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:15,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:15,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763144712] [2021-05-21 20:44:15,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:15,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:15,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:15,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:15,468 INFO L87 Difference]: Start difference. First operand 156 states and 458 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:15,524 INFO L93 Difference]: Finished difference Result 254 states and 704 transitions. [2021-05-21 20:44:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:15,524 INFO L225 Difference]: With dead ends: 254 [2021-05-21 20:44:15,525 INFO L226 Difference]: Without dead ends: 249 [2021-05-21 20:44:15,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-21 20:44:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 148. [2021-05-21 20:44:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.006802721088435) internal successors, (442), 147 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 442 transitions. [2021-05-21 20:44:15,527 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 442 transitions. Word has length 16 [2021-05-21 20:44:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:15,527 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 442 transitions. [2021-05-21 20:44:15,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 442 transitions. [2021-05-21 20:44:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:15,527 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:15,527 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:15,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2021-05-21 20:44:15,527 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash 499376906, now seen corresponding path program 35 times [2021-05-21 20:44:15,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:15,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71985733] [2021-05-21 20:44:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:15,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71985733] [2021-05-21 20:44:15,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71985733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646792595] [2021-05-21 20:44:15,567 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:44:15,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:15,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:15,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:15,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:15,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646792595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:15,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:15,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 20:44:15,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649201877] [2021-05-21 20:44:15,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:15,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:15,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:15,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:15,659 INFO L87 Difference]: Start difference. First operand 148 states and 442 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:15,834 INFO L93 Difference]: Finished difference Result 297 states and 849 transitions. [2021-05-21 20:44:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:15,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:15,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:15,835 INFO L225 Difference]: With dead ends: 297 [2021-05-21 20:44:15,835 INFO L226 Difference]: Without dead ends: 297 [2021-05-21 20:44:15,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:44:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-21 20:44:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 156. [2021-05-21 20:44:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.109677419354839) internal successors, (482), 155 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 482 transitions. [2021-05-21 20:44:15,853 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 482 transitions. Word has length 16 [2021-05-21 20:44:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:15,853 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 482 transitions. [2021-05-21 20:44:15,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 482 transitions. [2021-05-21 20:44:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:15,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:15,853 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:16,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-05-21 20:44:16,054 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:16,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1694413080, now seen corresponding path program 35 times [2021-05-21 20:44:16,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:16,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721695179] [2021-05-21 20:44:16,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:16,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:16,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721695179] [2021-05-21 20:44:16,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721695179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:16,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305065748] [2021-05-21 20:44:16,080 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:16,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:16,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:16,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:16,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:16,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305065748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:16,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:16,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:16,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505178662] [2021-05-21 20:44:16,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:16,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:16,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:16,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:16,163 INFO L87 Difference]: Start difference. First operand 156 states and 482 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:16,247 INFO L93 Difference]: Finished difference Result 308 states and 850 transitions. [2021-05-21 20:44:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:16,248 INFO L225 Difference]: With dead ends: 308 [2021-05-21 20:44:16,248 INFO L226 Difference]: Without dead ends: 304 [2021-05-21 20:44:16,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-21 20:44:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 164. [2021-05-21 20:44:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 3.1104294478527605) internal successors, (507), 163 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 507 transitions. [2021-05-21 20:44:16,251 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 507 transitions. Word has length 16 [2021-05-21 20:44:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:16,251 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 507 transitions. [2021-05-21 20:44:16,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 507 transitions. [2021-05-21 20:44:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:16,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:16,251 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:16,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-05-21 20:44:16,453 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1171599110, now seen corresponding path program 36 times [2021-05-21 20:44:16,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:16,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451763465] [2021-05-21 20:44:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:16,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:16,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451763465] [2021-05-21 20:44:16,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451763465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:16,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182303761] [2021-05-21 20:44:16,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:16,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:16,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:16,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:16,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182303761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:16,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:16,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 20:44:16,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881689171] [2021-05-21 20:44:16,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:16,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:16,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:16,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:16,570 INFO L87 Difference]: Start difference. First operand 164 states and 507 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:16,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:16,715 INFO L93 Difference]: Finished difference Result 297 states and 840 transitions. [2021-05-21 20:44:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:16,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:16,716 INFO L225 Difference]: With dead ends: 297 [2021-05-21 20:44:16,716 INFO L226 Difference]: Without dead ends: 294 [2021-05-21 20:44:16,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:44:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-21 20:44:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 161. [2021-05-21 20:44:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.05625) internal successors, (489), 160 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 489 transitions. [2021-05-21 20:44:16,719 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 489 transitions. Word has length 16 [2021-05-21 20:44:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:16,719 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 489 transitions. [2021-05-21 20:44:16,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 489 transitions. [2021-05-21 20:44:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:16,719 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:16,719 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:16,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-05-21 20:44:16,935 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash -245575666, now seen corresponding path program 36 times [2021-05-21 20:44:16,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:16,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248635941] [2021-05-21 20:44:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:16,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248635941] [2021-05-21 20:44:16,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248635941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856816298] [2021-05-21 20:44:16,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:16,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:16,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:16,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:17,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856816298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:17,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:17,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:17,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321271747] [2021-05-21 20:44:17,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:17,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:17,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:17,044 INFO L87 Difference]: Start difference. First operand 161 states and 489 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:17,118 INFO L93 Difference]: Finished difference Result 317 states and 873 transitions. [2021-05-21 20:44:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:17,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:17,119 INFO L225 Difference]: With dead ends: 317 [2021-05-21 20:44:17,119 INFO L226 Difference]: Without dead ends: 317 [2021-05-21 20:44:17,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-21 20:44:17,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 158. [2021-05-21 20:44:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.0573248407643314) internal successors, (480), 157 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 480 transitions. [2021-05-21 20:44:17,122 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 480 transitions. Word has length 16 [2021-05-21 20:44:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:17,122 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 480 transitions. [2021-05-21 20:44:17,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 480 transitions. [2021-05-21 20:44:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:17,122 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:17,122 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:17,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:17,333 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:17,333 INFO L82 PathProgramCache]: Analyzing trace with hash 841960418, now seen corresponding path program 37 times [2021-05-21 20:44:17,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:17,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083711511] [2021-05-21 20:44:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:17,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:17,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083711511] [2021-05-21 20:44:17,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083711511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:17,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096720222] [2021-05-21 20:44:17,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:17,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:17,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:17,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096720222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:17,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:17,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:17,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070801520] [2021-05-21 20:44:17,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:17,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:17,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:17,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:17,438 INFO L87 Difference]: Start difference. First operand 158 states and 480 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:17,520 INFO L93 Difference]: Finished difference Result 295 states and 832 transitions. [2021-05-21 20:44:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:17,521 INFO L225 Difference]: With dead ends: 295 [2021-05-21 20:44:17,521 INFO L226 Difference]: Without dead ends: 295 [2021-05-21 20:44:17,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-21 20:44:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 160. [2021-05-21 20:44:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.069182389937107) internal successors, (488), 159 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 488 transitions. [2021-05-21 20:44:17,523 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 488 transitions. Word has length 16 [2021-05-21 20:44:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:17,523 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 488 transitions. [2021-05-21 20:44:17,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 488 transitions. [2021-05-21 20:44:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:17,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:17,524 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:17,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:17,724 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:17,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1481293524, now seen corresponding path program 38 times [2021-05-21 20:44:17,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:17,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504581527] [2021-05-21 20:44:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:17,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:17,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504581527] [2021-05-21 20:44:17,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504581527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:17,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855750209] [2021-05-21 20:44:17,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:17,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:17,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:17,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:17,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:17,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855750209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:17,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:17,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:17,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071854782] [2021-05-21 20:44:17,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:17,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:17,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:17,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:17,818 INFO L87 Difference]: Start difference. First operand 160 states and 488 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:17,901 INFO L93 Difference]: Finished difference Result 273 states and 778 transitions. [2021-05-21 20:44:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:17,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:17,902 INFO L225 Difference]: With dead ends: 273 [2021-05-21 20:44:17,902 INFO L226 Difference]: Without dead ends: 271 [2021-05-21 20:44:17,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-21 20:44:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 158. [2021-05-21 20:44:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.0573248407643314) internal successors, (480), 157 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 480 transitions. [2021-05-21 20:44:17,905 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 480 transitions. Word has length 16 [2021-05-21 20:44:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:17,905 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 480 transitions. [2021-05-21 20:44:17,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 480 transitions. [2021-05-21 20:44:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:17,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:17,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:18,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-05-21 20:44:18,121 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash 952979406, now seen corresponding path program 37 times [2021-05-21 20:44:18,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:18,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786809947] [2021-05-21 20:44:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:18,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:18,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786809947] [2021-05-21 20:44:18,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786809947] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:18,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:18,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:18,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114457939] [2021-05-21 20:44:18,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:18,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:18,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:18,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:18,150 INFO L87 Difference]: Start difference. First operand 158 states and 480 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:18,221 INFO L93 Difference]: Finished difference Result 296 states and 795 transitions. [2021-05-21 20:44:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:18,223 INFO L225 Difference]: With dead ends: 296 [2021-05-21 20:44:18,223 INFO L226 Difference]: Without dead ends: 292 [2021-05-21 20:44:18,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-21 20:44:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 160. [2021-05-21 20:44:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0440251572327046) internal successors, (484), 159 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 484 transitions. [2021-05-21 20:44:18,225 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 484 transitions. Word has length 16 [2021-05-21 20:44:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:18,225 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 484 transitions. [2021-05-21 20:44:18,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 484 transitions. [2021-05-21 20:44:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:18,226 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:18,226 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:18,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311 [2021-05-21 20:44:18,226 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:18,226 INFO L82 PathProgramCache]: Analyzing trace with hash 879606926, now seen corresponding path program 38 times [2021-05-21 20:44:18,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:18,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193813032] [2021-05-21 20:44:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:18,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:18,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193813032] [2021-05-21 20:44:18,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193813032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:18,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:18,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:18,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488865986] [2021-05-21 20:44:18,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:18,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:18,253 INFO L87 Difference]: Start difference. First operand 160 states and 484 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:18,322 INFO L93 Difference]: Finished difference Result 279 states and 769 transitions. [2021-05-21 20:44:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:18,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:18,322 INFO L225 Difference]: With dead ends: 279 [2021-05-21 20:44:18,322 INFO L226 Difference]: Without dead ends: 276 [2021-05-21 20:44:18,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:18,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-21 20:44:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 159. [2021-05-21 20:44:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0443037974683542) internal successors, (481), 158 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 481 transitions. [2021-05-21 20:44:18,325 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 481 transitions. Word has length 16 [2021-05-21 20:44:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:18,325 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 481 transitions. [2021-05-21 20:44:18,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 481 transitions. [2021-05-21 20:44:18,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:18,326 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:18,326 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:18,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312 [2021-05-21 20:44:18,326 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash 213900140, now seen corresponding path program 39 times [2021-05-21 20:44:18,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:18,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208148607] [2021-05-21 20:44:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:18,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:18,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208148607] [2021-05-21 20:44:18,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208148607] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:18,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:18,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:18,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220064352] [2021-05-21 20:44:18,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:18,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:18,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:18,351 INFO L87 Difference]: Start difference. First operand 159 states and 481 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:18,422 INFO L93 Difference]: Finished difference Result 259 states and 730 transitions. [2021-05-21 20:44:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:18,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:18,423 INFO L225 Difference]: With dead ends: 259 [2021-05-21 20:44:18,423 INFO L226 Difference]: Without dead ends: 256 [2021-05-21 20:44:18,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-21 20:44:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 161. [2021-05-21 20:44:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.03125) internal successors, (485), 160 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 485 transitions. [2021-05-21 20:44:18,426 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 485 transitions. Word has length 16 [2021-05-21 20:44:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:18,426 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 485 transitions. [2021-05-21 20:44:18,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 485 transitions. [2021-05-21 20:44:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:18,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:18,427 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:18,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2021-05-21 20:44:18,427 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:18,428 INFO L82 PathProgramCache]: Analyzing trace with hash -883427436, now seen corresponding path program 40 times [2021-05-21 20:44:18,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:18,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730773898] [2021-05-21 20:44:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:18,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:18,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730773898] [2021-05-21 20:44:18,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730773898] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:18,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:18,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:18,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247258843] [2021-05-21 20:44:18,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:18,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:18,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:18,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:18,469 INFO L87 Difference]: Start difference. First operand 161 states and 485 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:18,544 INFO L93 Difference]: Finished difference Result 245 states and 709 transitions. [2021-05-21 20:44:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:18,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:18,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:18,546 INFO L225 Difference]: With dead ends: 245 [2021-05-21 20:44:18,546 INFO L226 Difference]: Without dead ends: 242 [2021-05-21 20:44:18,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-21 20:44:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 160. [2021-05-21 20:44:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0314465408805034) internal successors, (482), 159 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 482 transitions. [2021-05-21 20:44:18,552 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 482 transitions. Word has length 16 [2021-05-21 20:44:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:18,552 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 482 transitions. [2021-05-21 20:44:18,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 482 transitions. [2021-05-21 20:44:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:18,552 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:18,552 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:18,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314 [2021-05-21 20:44:18,553 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash 55906398, now seen corresponding path program 39 times [2021-05-21 20:44:18,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:18,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007635985] [2021-05-21 20:44:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:18,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:18,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007635985] [2021-05-21 20:44:18,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007635985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:18,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415588719] [2021-05-21 20:44:18,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:18,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:44:18,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:18,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:18,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:18,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415588719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:18,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:18,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:18,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706321098] [2021-05-21 20:44:18,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:18,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:18,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:18,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:18,665 INFO L87 Difference]: Start difference. First operand 160 states and 482 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:18,767 INFO L93 Difference]: Finished difference Result 285 states and 786 transitions. [2021-05-21 20:44:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:18,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:18,768 INFO L225 Difference]: With dead ends: 285 [2021-05-21 20:44:18,768 INFO L226 Difference]: Without dead ends: 285 [2021-05-21 20:44:18,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-21 20:44:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 158. [2021-05-21 20:44:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9936305732484074) internal successors, (470), 157 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 470 transitions. [2021-05-21 20:44:18,771 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 470 transitions. Word has length 16 [2021-05-21 20:44:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:18,771 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 470 transitions. [2021-05-21 20:44:18,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 470 transitions. [2021-05-21 20:44:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:18,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:18,772 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:18,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:18,987 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:18,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:18,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1417462504, now seen corresponding path program 40 times [2021-05-21 20:44:18,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:18,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923819158] [2021-05-21 20:44:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:19,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:19,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923819158] [2021-05-21 20:44:19,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923819158] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:19,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:19,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:19,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952922947] [2021-05-21 20:44:19,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:19,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:19,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:19,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:19,016 INFO L87 Difference]: Start difference. First operand 158 states and 470 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:19,086 INFO L93 Difference]: Finished difference Result 259 states and 722 transitions. [2021-05-21 20:44:19,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:19,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:19,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:19,087 INFO L225 Difference]: With dead ends: 259 [2021-05-21 20:44:19,087 INFO L226 Difference]: Without dead ends: 257 [2021-05-21 20:44:19,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-21 20:44:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 148. [2021-05-21 20:44:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.0136054421768708) internal successors, (443), 147 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 443 transitions. [2021-05-21 20:44:19,089 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 443 transitions. Word has length 16 [2021-05-21 20:44:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:19,089 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 443 transitions. [2021-05-21 20:44:19,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 443 transitions. [2021-05-21 20:44:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:19,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:19,090 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:19,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316 [2021-05-21 20:44:19,090 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:19,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:19,090 INFO L82 PathProgramCache]: Analyzing trace with hash 105703180, now seen corresponding path program 41 times [2021-05-21 20:44:19,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:19,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590972900] [2021-05-21 20:44:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:19,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:19,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590972900] [2021-05-21 20:44:19,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590972900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:19,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517702445] [2021-05-21 20:44:19,119 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:19,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:44:19,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:19,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:19,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:19,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517702445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:19,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:19,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:44:19,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571138360] [2021-05-21 20:44:19,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:44:19,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:19,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:44:19,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:44:19,175 INFO L87 Difference]: Start difference. First operand 148 states and 443 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:19,247 INFO L93 Difference]: Finished difference Result 245 states and 701 transitions. [2021-05-21 20:44:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:19,247 INFO L225 Difference]: With dead ends: 245 [2021-05-21 20:44:19,247 INFO L226 Difference]: Without dead ends: 245 [2021-05-21 20:44:19,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-21 20:44:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 137. [2021-05-21 20:44:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0220588235294117) internal successors, (411), 136 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 411 transitions. [2021-05-21 20:44:19,249 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 411 transitions. Word has length 16 [2021-05-21 20:44:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:19,249 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 411 transitions. [2021-05-21 20:44:19,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 411 transitions. [2021-05-21 20:44:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:19,250 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:19,250 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:19,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2021-05-21 20:44:19,465 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:19,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:19,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1387314302, now seen corresponding path program 42 times [2021-05-21 20:44:19,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:19,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094355650] [2021-05-21 20:44:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:19,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:19,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094355650] [2021-05-21 20:44:19,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094355650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:19,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325348160] [2021-05-21 20:44:19,494 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:44:19,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:19,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:19,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:19,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:19,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325348160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:19,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:19,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:19,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803193362] [2021-05-21 20:44:19,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:19,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:19,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:19,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:19,567 INFO L87 Difference]: Start difference. First operand 137 states and 411 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:19,651 INFO L93 Difference]: Finished difference Result 240 states and 665 transitions. [2021-05-21 20:44:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:19,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:19,652 INFO L225 Difference]: With dead ends: 240 [2021-05-21 20:44:19,652 INFO L226 Difference]: Without dead ends: 240 [2021-05-21 20:44:19,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-21 20:44:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 135. [2021-05-21 20:44:19,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.9776119402985075) internal successors, (399), 134 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) [2021-05-21 20:44:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 399 transitions. [2021-05-21 20:44:19,654 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 399 transitions. Word has length 16 [2021-05-21 20:44:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:19,654 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 399 transitions. [2021-05-21 20:44:19,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 399 transitions. [2021-05-21 20:44:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:19,654 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:19,654 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:19,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:19,869 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:19,870 INFO L82 PathProgramCache]: Analyzing trace with hash -777157054, now seen corresponding path program 43 times [2021-05-21 20:44:19,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:19,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392894273] [2021-05-21 20:44:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:19,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:19,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392894273] [2021-05-21 20:44:19,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392894273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:19,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365371766] [2021-05-21 20:44:19,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:44:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:19,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:19,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:19,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365371766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:19,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:19,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:19,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466500514] [2021-05-21 20:44:19,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:19,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:19,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:19,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:19,960 INFO L87 Difference]: Start difference. First operand 135 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:20,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:20,057 INFO L93 Difference]: Finished difference Result 216 states and 610 transitions. [2021-05-21 20:44:20,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:20,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:20,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:20,058 INFO L225 Difference]: With dead ends: 216 [2021-05-21 20:44:20,058 INFO L226 Difference]: Without dead ends: 214 [2021-05-21 20:44:20,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-21 20:44:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 125. [2021-05-21 20:44:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.9919354838709675) internal successors, (371), 124 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 371 transitions. [2021-05-21 20:44:20,060 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 371 transitions. Word has length 16 [2021-05-21 20:44:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:20,060 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 371 transitions. [2021-05-21 20:44:20,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 371 transitions. [2021-05-21 20:44:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:20,060 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:20,061 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:20,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2021-05-21 20:44:20,276 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash 276142176, now seen corresponding path program 44 times [2021-05-21 20:44:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:20,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991967683] [2021-05-21 20:44:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:20,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:20,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991967683] [2021-05-21 20:44:20,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991967683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:20,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777736918] [2021-05-21 20:44:20,309 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:20,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:20,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:20,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:20,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:20,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777736918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:20,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:20,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:20,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324633926] [2021-05-21 20:44:20,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:20,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:20,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:20,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:20,383 INFO L87 Difference]: Start difference. First operand 125 states and 371 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:20,472 INFO L93 Difference]: Finished difference Result 197 states and 550 transitions. [2021-05-21 20:44:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:20,473 INFO L225 Difference]: With dead ends: 197 [2021-05-21 20:44:20,473 INFO L226 Difference]: Without dead ends: 197 [2021-05-21 20:44:20,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-21 20:44:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 129. [2021-05-21 20:44:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0234375) internal successors, (387), 128 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 387 transitions. [2021-05-21 20:44:20,474 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 387 transitions. Word has length 16 [2021-05-21 20:44:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:20,475 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 387 transitions. [2021-05-21 20:44:20,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 387 transitions. [2021-05-21 20:44:20,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:20,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:20,475 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:20,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-05-21 20:44:20,691 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:20,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:20,691 INFO L82 PathProgramCache]: Analyzing trace with hash 886299424, now seen corresponding path program 45 times [2021-05-21 20:44:20,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:20,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442256080] [2021-05-21 20:44:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:20,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:20,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442256080] [2021-05-21 20:44:20,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442256080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:20,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588732573] [2021-05-21 20:44:20,716 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:44:20,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:44:20,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:20,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:20,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588732573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:20,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:20,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:20,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627072286] [2021-05-21 20:44:20,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:20,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:20,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:20,798 INFO L87 Difference]: Start difference. First operand 129 states and 387 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:20,891 INFO L93 Difference]: Finished difference Result 199 states and 552 transitions. [2021-05-21 20:44:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:20,892 INFO L225 Difference]: With dead ends: 199 [2021-05-21 20:44:20,892 INFO L226 Difference]: Without dead ends: 197 [2021-05-21 20:44:20,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:20,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-21 20:44:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2021-05-21 20:44:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 3.007936507936508) internal successors, (379), 126 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 379 transitions. [2021-05-21 20:44:20,894 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 379 transitions. Word has length 16 [2021-05-21 20:44:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:20,894 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 379 transitions. [2021-05-21 20:44:20,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 379 transitions. [2021-05-21 20:44:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:20,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:20,894 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:21,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-05-21 20:44:21,097 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:21,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1804249614, now seen corresponding path program 46 times [2021-05-21 20:44:21,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:21,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567625305] [2021-05-21 20:44:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:21,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:21,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567625305] [2021-05-21 20:44:21,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567625305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:21,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438164840] [2021-05-21 20:44:21,119 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:21,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:21,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:21,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:21,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438164840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:21,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:21,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:21,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674562556] [2021-05-21 20:44:21,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:21,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:21,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:21,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:21,187 INFO L87 Difference]: Start difference. First operand 127 states and 379 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:21,268 INFO L93 Difference]: Finished difference Result 178 states and 504 transitions. [2021-05-21 20:44:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:21,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:21,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:21,269 INFO L225 Difference]: With dead ends: 178 [2021-05-21 20:44:21,269 INFO L226 Difference]: Without dead ends: 174 [2021-05-21 20:44:21,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-21 20:44:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2021-05-21 20:44:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 3.016260162601626) internal successors, (371), 123 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 371 transitions. [2021-05-21 20:44:21,271 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 371 transitions. Word has length 16 [2021-05-21 20:44:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:21,271 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 371 transitions. [2021-05-21 20:44:21,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 371 transitions. [2021-05-21 20:44:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:21,271 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:21,271 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:21,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:21,485 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:21,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1122947330, now seen corresponding path program 41 times [2021-05-21 20:44:21,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:21,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995642323] [2021-05-21 20:44:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:21,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:21,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995642323] [2021-05-21 20:44:21,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995642323] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:21,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:21,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:21,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452703069] [2021-05-21 20:44:21,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:21,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:21,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:21,509 INFO L87 Difference]: Start difference. First operand 124 states and 371 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:21,575 INFO L93 Difference]: Finished difference Result 187 states and 507 transitions. [2021-05-21 20:44:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:21,575 INFO L225 Difference]: With dead ends: 187 [2021-05-21 20:44:21,575 INFO L226 Difference]: Without dead ends: 177 [2021-05-21 20:44:21,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-21 20:44:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 128. [2021-05-21 20:44:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.968503937007874) internal successors, (377), 127 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 377 transitions. [2021-05-21 20:44:21,577 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 377 transitions. Word has length 16 [2021-05-21 20:44:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:21,577 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 377 transitions. [2021-05-21 20:44:21,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 377 transitions. [2021-05-21 20:44:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:21,577 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:21,577 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:21,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329 [2021-05-21 20:44:21,578 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash -701314238, now seen corresponding path program 42 times [2021-05-21 20:44:21,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:21,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843915146] [2021-05-21 20:44:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:21,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:21,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843915146] [2021-05-21 20:44:21,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843915146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:21,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:21,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:21,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536198979] [2021-05-21 20:44:21,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:21,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:21,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:21,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:21,608 INFO L87 Difference]: Start difference. First operand 128 states and 377 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:21,706 INFO L93 Difference]: Finished difference Result 195 states and 514 transitions. [2021-05-21 20:44:21,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:21,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:21,706 INFO L225 Difference]: With dead ends: 195 [2021-05-21 20:44:21,706 INFO L226 Difference]: Without dead ends: 191 [2021-05-21 20:44:21,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-21 20:44:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 134. [2021-05-21 20:44:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.924812030075188) internal successors, (389), 133 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 389 transitions. [2021-05-21 20:44:21,708 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 389 transitions. Word has length 16 [2021-05-21 20:44:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:21,708 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 389 transitions. [2021-05-21 20:44:21,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 389 transitions. [2021-05-21 20:44:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:21,709 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:21,709 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:21,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330 [2021-05-21 20:44:21,709 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:21,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:21,709 INFO L82 PathProgramCache]: Analyzing trace with hash -774686718, now seen corresponding path program 43 times [2021-05-21 20:44:21,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:21,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185255809] [2021-05-21 20:44:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:21,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:21,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185255809] [2021-05-21 20:44:21,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185255809] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:21,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:21,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:21,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634446054] [2021-05-21 20:44:21,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:21,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:21,740 INFO L87 Difference]: Start difference. First operand 134 states and 389 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:21,815 INFO L93 Difference]: Finished difference Result 180 states and 492 transitions. [2021-05-21 20:44:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:21,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:21,815 INFO L225 Difference]: With dead ends: 180 [2021-05-21 20:44:21,815 INFO L226 Difference]: Without dead ends: 175 [2021-05-21 20:44:21,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:21,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-21 20:44:21,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 126. [2021-05-21 20:44:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.984) internal successors, (373), 125 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 373 transitions. [2021-05-21 20:44:21,817 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 373 transitions. Word has length 16 [2021-05-21 20:44:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:21,817 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 373 transitions. [2021-05-21 20:44:21,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,817 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 373 transitions. [2021-05-21 20:44:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:21,817 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:21,817 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:21,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331 [2021-05-21 20:44:21,817 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:21,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1714006770, now seen corresponding path program 44 times [2021-05-21 20:44:21,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:21,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339476485] [2021-05-21 20:44:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:21,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:21,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339476485] [2021-05-21 20:44:21,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339476485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:21,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:21,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:21,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175044315] [2021-05-21 20:44:21,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:21,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:21,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:21,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:21,854 INFO L87 Difference]: Start difference. First operand 126 states and 373 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:21,940 INFO L93 Difference]: Finished difference Result 178 states and 483 transitions. [2021-05-21 20:44:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:21,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:21,940 INFO L225 Difference]: With dead ends: 178 [2021-05-21 20:44:21,940 INFO L226 Difference]: Without dead ends: 174 [2021-05-21 20:44:21,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-21 20:44:21,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 134. [2021-05-21 20:44:21,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.9323308270676693) internal successors, (390), 133 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 390 transitions. [2021-05-21 20:44:21,942 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 390 transitions. Word has length 16 [2021-05-21 20:44:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:21,942 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 390 transitions. [2021-05-21 20:44:21,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 390 transitions. [2021-05-21 20:44:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:21,943 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:21,943 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:21,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332 [2021-05-21 20:44:21,943 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:21,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1787379250, now seen corresponding path program 45 times [2021-05-21 20:44:21,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:21,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672207058] [2021-05-21 20:44:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:21,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:21,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672207058] [2021-05-21 20:44:21,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672207058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:21,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:21,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:21,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040169664] [2021-05-21 20:44:21,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:21,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:21,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:21,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:21,972 INFO L87 Difference]: Start difference. First operand 134 states and 390 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:22,055 INFO L93 Difference]: Finished difference Result 176 states and 480 transitions. [2021-05-21 20:44:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:22,055 INFO L225 Difference]: With dead ends: 176 [2021-05-21 20:44:22,055 INFO L226 Difference]: Without dead ends: 173 [2021-05-21 20:44:22,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-21 20:44:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 133. [2021-05-21 20:44:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.9318181818181817) internal successors, (387), 132 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 387 transitions. [2021-05-21 20:44:22,057 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 387 transitions. Word has length 16 [2021-05-21 20:44:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:22,057 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 387 transitions. [2021-05-21 20:44:22,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 387 transitions. [2021-05-21 20:44:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:22,057 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:22,057 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:22,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2021-05-21 20:44:22,058 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:22,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1784753474, now seen corresponding path program 46 times [2021-05-21 20:44:22,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:22,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384165228] [2021-05-21 20:44:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:22,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:22,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384165228] [2021-05-21 20:44:22,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384165228] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:22,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:22,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:22,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380516104] [2021-05-21 20:44:22,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:22,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:22,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:22,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:22,081 INFO L87 Difference]: Start difference. First operand 133 states and 387 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:22,139 INFO L93 Difference]: Finished difference Result 162 states and 458 transitions. [2021-05-21 20:44:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:22,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:22,139 INFO L225 Difference]: With dead ends: 162 [2021-05-21 20:44:22,140 INFO L226 Difference]: Without dead ends: 155 [2021-05-21 20:44:22,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:22,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-21 20:44:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 124. [2021-05-21 20:44:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 3.0) internal successors, (369), 123 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 369 transitions. [2021-05-21 20:44:22,141 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 369 transitions. Word has length 16 [2021-05-21 20:44:22,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:22,141 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 369 transitions. [2021-05-21 20:44:22,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,141 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 369 transitions. [2021-05-21 20:44:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:22,142 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:22,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:22,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334 [2021-05-21 20:44:22,142 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:22,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:22,142 INFO L82 PathProgramCache]: Analyzing trace with hash -829320514, now seen corresponding path program 47 times [2021-05-21 20:44:22,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:22,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483632361] [2021-05-21 20:44:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:22,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:22,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483632361] [2021-05-21 20:44:22,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483632361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:22,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916864097] [2021-05-21 20:44:22,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:22,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:22,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:22,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:22,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:22,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916864097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:22,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:22,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 20:44:22,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092914775] [2021-05-21 20:44:22,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:22,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:22,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:22,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:22,271 INFO L87 Difference]: Start difference. First operand 124 states and 369 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:22,423 INFO L93 Difference]: Finished difference Result 206 states and 593 transitions. [2021-05-21 20:44:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:22,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:22,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:22,423 INFO L225 Difference]: With dead ends: 206 [2021-05-21 20:44:22,423 INFO L226 Difference]: Without dead ends: 206 [2021-05-21 20:44:22,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:44:22,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-21 20:44:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 134. [2021-05-21 20:44:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.1503759398496243) internal successors, (419), 133 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 419 transitions. [2021-05-21 20:44:22,425 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 419 transitions. Word has length 16 [2021-05-21 20:44:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:22,425 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 419 transitions. [2021-05-21 20:44:22,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 419 transitions. [2021-05-21 20:44:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:22,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:22,426 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:22,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-05-21 20:44:22,641 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:22,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:22,641 INFO L82 PathProgramCache]: Analyzing trace with hash 365715660, now seen corresponding path program 47 times [2021-05-21 20:44:22,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:22,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264107756] [2021-05-21 20:44:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:22,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264107756] [2021-05-21 20:44:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264107756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343596336] [2021-05-21 20:44:22,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:22,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:22,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:22,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:22,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343596336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:22,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:22,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:22,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543896579] [2021-05-21 20:44:22,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:22,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:22,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:22,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:22,747 INFO L87 Difference]: Start difference. First operand 134 states and 419 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:22,835 INFO L93 Difference]: Finished difference Result 228 states and 642 transitions. [2021-05-21 20:44:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:22,836 INFO L225 Difference]: With dead ends: 228 [2021-05-21 20:44:22,836 INFO L226 Difference]: Without dead ends: 224 [2021-05-21 20:44:22,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:22,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-21 20:44:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 143. [2021-05-21 20:44:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.1619718309859155) internal successors, (449), 142 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 449 transitions. [2021-05-21 20:44:22,838 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 449 transitions. Word has length 16 [2021-05-21 20:44:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:22,838 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 449 transitions. [2021-05-21 20:44:22,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 449 transitions. [2021-05-21 20:44:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:22,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:22,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:23,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:23,053 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1794670766, now seen corresponding path program 48 times [2021-05-21 20:44:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:23,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340499127] [2021-05-21 20:44:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:23,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:23,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340499127] [2021-05-21 20:44:23,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340499127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:23,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289474929] [2021-05-21 20:44:23,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:23,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:23,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:23,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289474929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:23,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:23,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 20:44:23,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177925669] [2021-05-21 20:44:23,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:23,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:23,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:23,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:23,186 INFO L87 Difference]: Start difference. First operand 143 states and 449 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:23,324 INFO L93 Difference]: Finished difference Result 204 states and 583 transitions. [2021-05-21 20:44:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:23,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:23,324 INFO L225 Difference]: With dead ends: 204 [2021-05-21 20:44:23,324 INFO L226 Difference]: Without dead ends: 201 [2021-05-21 20:44:23,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:44:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-21 20:44:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 146. [2021-05-21 20:44:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 3.117241379310345) internal successors, (452), 145 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 452 transitions. [2021-05-21 20:44:23,326 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 452 transitions. Word has length 16 [2021-05-21 20:44:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:23,327 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 452 transitions. [2021-05-21 20:44:23,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 452 transitions. [2021-05-21 20:44:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:23,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:23,327 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:23,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-05-21 20:44:23,528 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1574273086, now seen corresponding path program 48 times [2021-05-21 20:44:23,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:23,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289419518] [2021-05-21 20:44:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:23,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289419518] [2021-05-21 20:44:23,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289419518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695771383] [2021-05-21 20:44:23,559 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:23,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:23,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:23,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:23,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:23,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695771383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:23,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:23,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:23,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854288759] [2021-05-21 20:44:23,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:23,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:23,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:23,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:23,663 INFO L87 Difference]: Start difference. First operand 146 states and 452 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:23,768 INFO L93 Difference]: Finished difference Result 237 states and 668 transitions. [2021-05-21 20:44:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:23,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:23,769 INFO L225 Difference]: With dead ends: 237 [2021-05-21 20:44:23,769 INFO L226 Difference]: Without dead ends: 237 [2021-05-21 20:44:23,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-21 20:44:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 143. [2021-05-21 20:44:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.119718309859155) internal successors, (443), 142 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 443 transitions. [2021-05-21 20:44:23,771 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 443 transitions. Word has length 16 [2021-05-21 20:44:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:23,771 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 443 transitions. [2021-05-21 20:44:23,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 443 transitions. [2021-05-21 20:44:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:23,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:23,771 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:23,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-05-21 20:44:23,985 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:23,985 INFO L82 PathProgramCache]: Analyzing trace with hash -486737002, now seen corresponding path program 49 times [2021-05-21 20:44:23,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:23,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826986973] [2021-05-21 20:44:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:24,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:24,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826986973] [2021-05-21 20:44:24,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826986973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:24,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232485431] [2021-05-21 20:44:24,016 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:24,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232485431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:24,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:24,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:24,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983073152] [2021-05-21 20:44:24,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:24,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:24,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:24,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:24,138 INFO L87 Difference]: Start difference. First operand 143 states and 443 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:24,211 INFO L93 Difference]: Finished difference Result 241 states and 680 transitions. [2021-05-21 20:44:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:24,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:24,212 INFO L225 Difference]: With dead ends: 241 [2021-05-21 20:44:24,212 INFO L226 Difference]: Without dead ends: 241 [2021-05-21 20:44:24,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-21 20:44:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 145. [2021-05-21 20:44:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.1319444444444446) internal successors, (451), 144 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 451 transitions. [2021-05-21 20:44:24,214 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 451 transitions. Word has length 16 [2021-05-21 20:44:24,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:24,214 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 451 transitions. [2021-05-21 20:44:24,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 451 transitions. [2021-05-21 20:44:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:24,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:24,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:24,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-05-21 20:44:24,430 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:24,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1484976352, now seen corresponding path program 50 times [2021-05-21 20:44:24,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:24,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149251045] [2021-05-21 20:44:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:24,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:24,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149251045] [2021-05-21 20:44:24,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149251045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:24,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180911403] [2021-05-21 20:44:24,457 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:24,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:24,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:24,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:24,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:24,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180911403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:24,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:24,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:24,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815768749] [2021-05-21 20:44:24,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:24,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:24,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:24,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:24,533 INFO L87 Difference]: Start difference. First operand 145 states and 451 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:24,611 INFO L93 Difference]: Finished difference Result 219 states and 626 transitions. [2021-05-21 20:44:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:24,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:24,612 INFO L225 Difference]: With dead ends: 219 [2021-05-21 20:44:24,612 INFO L226 Difference]: Without dead ends: 217 [2021-05-21 20:44:24,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-21 20:44:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 143. [2021-05-21 20:44:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.119718309859155) internal successors, (443), 142 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 443 transitions. [2021-05-21 20:44:24,614 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 443 transitions. Word has length 16 [2021-05-21 20:44:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:24,614 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 443 transitions. [2021-05-21 20:44:24,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 443 transitions. [2021-05-21 20:44:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:24,614 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:24,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:24,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-05-21 20:44:24,825 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:24,826 INFO L82 PathProgramCache]: Analyzing trace with hash -375718014, now seen corresponding path program 49 times [2021-05-21 20:44:24,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:24,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946307063] [2021-05-21 20:44:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:24,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:24,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946307063] [2021-05-21 20:44:24,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946307063] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:24,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:24,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:24,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891601350] [2021-05-21 20:44:24,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:24,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:24,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:24,854 INFO L87 Difference]: Start difference. First operand 143 states and 443 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:24,921 INFO L93 Difference]: Finished difference Result 252 states and 683 transitions. [2021-05-21 20:44:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:24,921 INFO L225 Difference]: With dead ends: 252 [2021-05-21 20:44:24,921 INFO L226 Difference]: Without dead ends: 248 [2021-05-21 20:44:24,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-21 20:44:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 145. [2021-05-21 20:44:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.1041666666666665) internal successors, (447), 144 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 447 transitions. [2021-05-21 20:44:24,923 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 447 transitions. Word has length 16 [2021-05-21 20:44:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:24,923 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 447 transitions. [2021-05-21 20:44:24,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:24,924 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 447 transitions. [2021-05-21 20:44:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:24,924 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:24,924 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:24,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347 [2021-05-21 20:44:24,924 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:24,924 INFO L82 PathProgramCache]: Analyzing trace with hash -449090494, now seen corresponding path program 50 times [2021-05-21 20:44:24,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:24,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838722664] [2021-05-21 20:44:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:24,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:24,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838722664] [2021-05-21 20:44:24,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838722664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:24,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:24,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:24,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086497036] [2021-05-21 20:44:24,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:24,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:24,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:24,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:24,951 INFO L87 Difference]: Start difference. First operand 145 states and 447 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:25,014 INFO L93 Difference]: Finished difference Result 235 states and 657 transitions. [2021-05-21 20:44:25,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:25,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:25,015 INFO L225 Difference]: With dead ends: 235 [2021-05-21 20:44:25,015 INFO L226 Difference]: Without dead ends: 232 [2021-05-21 20:44:25,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-21 20:44:25,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 144. [2021-05-21 20:44:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 3.104895104895105) internal successors, (444), 143 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 444 transitions. [2021-05-21 20:44:25,017 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 444 transitions. Word has length 16 [2021-05-21 20:44:25,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:25,017 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 444 transitions. [2021-05-21 20:44:25,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,017 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 444 transitions. [2021-05-21 20:44:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:25,018 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:25,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:25,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348 [2021-05-21 20:44:25,018 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:25,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1114797280, now seen corresponding path program 51 times [2021-05-21 20:44:25,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:25,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369920018] [2021-05-21 20:44:25,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:25,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:25,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369920018] [2021-05-21 20:44:25,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369920018] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:25,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:25,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:25,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021138574] [2021-05-21 20:44:25,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:25,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:25,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:25,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:25,051 INFO L87 Difference]: Start difference. First operand 144 states and 444 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:25,154 INFO L93 Difference]: Finished difference Result 221 states and 606 transitions. [2021-05-21 20:44:25,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:25,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:25,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:25,155 INFO L225 Difference]: With dead ends: 221 [2021-05-21 20:44:25,155 INFO L226 Difference]: Without dead ends: 218 [2021-05-21 20:44:25,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-21 20:44:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 146. [2021-05-21 20:44:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 3.089655172413793) internal successors, (448), 145 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 448 transitions. [2021-05-21 20:44:25,157 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 448 transitions. Word has length 16 [2021-05-21 20:44:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:25,157 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 448 transitions. [2021-05-21 20:44:25,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 448 transitions. [2021-05-21 20:44:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:25,157 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:25,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:25,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349 [2021-05-21 20:44:25,157 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:25,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:25,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2082842440, now seen corresponding path program 52 times [2021-05-21 20:44:25,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:25,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529581422] [2021-05-21 20:44:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:25,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:25,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529581422] [2021-05-21 20:44:25,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529581422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:25,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:25,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:25,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042032655] [2021-05-21 20:44:25,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:25,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:25,184 INFO L87 Difference]: Start difference. First operand 146 states and 448 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:25,274 INFO L93 Difference]: Finished difference Result 207 states and 585 transitions. [2021-05-21 20:44:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:25,274 INFO L225 Difference]: With dead ends: 207 [2021-05-21 20:44:25,274 INFO L226 Difference]: Without dead ends: 204 [2021-05-21 20:44:25,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-21 20:44:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 145. [2021-05-21 20:44:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0902777777777777) internal successors, (445), 144 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 445 transitions. [2021-05-21 20:44:25,276 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 445 transitions. Word has length 16 [2021-05-21 20:44:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:25,276 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 445 transitions. [2021-05-21 20:44:25,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 445 transitions. [2021-05-21 20:44:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:25,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:25,277 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:25,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350 [2021-05-21 20:44:25,277 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1272791022, now seen corresponding path program 51 times [2021-05-21 20:44:25,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:25,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902039141] [2021-05-21 20:44:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:25,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:25,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902039141] [2021-05-21 20:44:25,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902039141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:25,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485774296] [2021-05-21 20:44:25,307 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:44:25,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:44:25,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:25,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:25,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485774296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:25,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:25,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:25,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300068227] [2021-05-21 20:44:25,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:25,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:25,389 INFO L87 Difference]: Start difference. First operand 145 states and 445 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:25,482 INFO L93 Difference]: Finished difference Result 271 states and 747 transitions. [2021-05-21 20:44:25,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:25,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:25,483 INFO L225 Difference]: With dead ends: 271 [2021-05-21 20:44:25,483 INFO L226 Difference]: Without dead ends: 271 [2021-05-21 20:44:25,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-21 20:44:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 147. [2021-05-21 20:44:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.1027397260273974) internal successors, (453), 146 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 453 transitions. [2021-05-21 20:44:25,485 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 453 transitions. Word has length 16 [2021-05-21 20:44:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:25,485 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 453 transitions. [2021-05-21 20:44:25,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 453 transitions. [2021-05-21 20:44:25,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:25,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:25,486 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:25,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:25,697 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:25,697 INFO L82 PathProgramCache]: Analyzing trace with hash 88765084, now seen corresponding path program 52 times [2021-05-21 20:44:25,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:25,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271770797] [2021-05-21 20:44:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:25,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:25,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271770797] [2021-05-21 20:44:25,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271770797] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:25,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:25,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:25,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917567957] [2021-05-21 20:44:25,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:25,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:25,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:25,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:25,725 INFO L87 Difference]: Start difference. First operand 147 states and 453 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:25,798 INFO L93 Difference]: Finished difference Result 245 states and 683 transitions. [2021-05-21 20:44:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:25,798 INFO L225 Difference]: With dead ends: 245 [2021-05-21 20:44:25,798 INFO L226 Difference]: Without dead ends: 243 [2021-05-21 20:44:25,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-21 20:44:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 144. [2021-05-21 20:44:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 3.090909090909091) internal successors, (442), 143 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 442 transitions. [2021-05-21 20:44:25,801 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 442 transitions. Word has length 16 [2021-05-21 20:44:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:25,801 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 442 transitions. [2021-05-21 20:44:25,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 442 transitions. [2021-05-21 20:44:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:25,801 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:25,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:25,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352 [2021-05-21 20:44:25,801 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:25,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1701446174, now seen corresponding path program 53 times [2021-05-21 20:44:25,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:25,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884402917] [2021-05-21 20:44:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:25,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:25,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884402917] [2021-05-21 20:44:25,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884402917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:25,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238812854] [2021-05-21 20:44:25,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:25,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:44:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:25,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:25,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238812854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:25,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:25,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:25,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559057932] [2021-05-21 20:44:25,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:25,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:25,917 INFO L87 Difference]: Start difference. First operand 144 states and 442 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:26,000 INFO L93 Difference]: Finished difference Result 215 states and 605 transitions. [2021-05-21 20:44:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:26,000 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:26,000 INFO L225 Difference]: With dead ends: 215 [2021-05-21 20:44:26,000 INFO L226 Difference]: Without dead ends: 215 [2021-05-21 20:44:26,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-21 20:44:26,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 143. [2021-05-21 20:44:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.0492957746478875) internal successors, (433), 142 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 433 transitions. [2021-05-21 20:44:26,002 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 433 transitions. Word has length 16 [2021-05-21 20:44:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:26,002 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 433 transitions. [2021-05-21 20:44:26,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 433 transitions. [2021-05-21 20:44:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:26,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:26,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:26,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:26,203 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash -621807768, now seen corresponding path program 54 times [2021-05-21 20:44:26,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:26,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129381942] [2021-05-21 20:44:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:26,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:26,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129381942] [2021-05-21 20:44:26,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129381942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:26,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586126357] [2021-05-21 20:44:26,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:26,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:26,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:26,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:26,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586126357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:26,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:26,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:26,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117577254] [2021-05-21 20:44:26,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:26,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:26,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:26,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:26,313 INFO L87 Difference]: Start difference. First operand 143 states and 433 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:26,399 INFO L93 Difference]: Finished difference Result 206 states and 578 transitions. [2021-05-21 20:44:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:26,400 INFO L225 Difference]: With dead ends: 206 [2021-05-21 20:44:26,400 INFO L226 Difference]: Without dead ends: 204 [2021-05-21 20:44:26,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:26,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-21 20:44:26,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 137. [2021-05-21 20:44:26,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0661764705882355) internal successors, (417), 136 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 417 transitions. [2021-05-21 20:44:26,402 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 417 transitions. Word has length 16 [2021-05-21 20:44:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:26,402 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 417 transitions. [2021-05-21 20:44:26,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 417 transitions. [2021-05-21 20:44:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:26,402 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:26,402 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:26,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-05-21 20:44:26,614 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:26,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:26,614 INFO L82 PathProgramCache]: Analyzing trace with hash -239087380, now seen corresponding path program 55 times [2021-05-21 20:44:26,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:26,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531635785] [2021-05-21 20:44:26,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:26,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:26,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531635785] [2021-05-21 20:44:26,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531635785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:26,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227203272] [2021-05-21 20:44:26,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:26,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:26,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:26,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227203272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:26,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:26,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:26,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625568018] [2021-05-21 20:44:26,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:26,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:26,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:26,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:26,703 INFO L87 Difference]: Start difference. First operand 137 states and 417 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:26,770 INFO L93 Difference]: Finished difference Result 185 states and 529 transitions. [2021-05-21 20:44:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:26,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:26,771 INFO L225 Difference]: With dead ends: 185 [2021-05-21 20:44:26,771 INFO L226 Difference]: Without dead ends: 181 [2021-05-21 20:44:26,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-21 20:44:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 135. [2021-05-21 20:44:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.0522388059701493) internal successors, (409), 134 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 409 transitions. [2021-05-21 20:44:26,773 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 409 transitions. Word has length 16 [2021-05-21 20:44:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:26,773 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 409 transitions. [2021-05-21 20:44:26,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 409 transitions. [2021-05-21 20:44:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:26,773 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:26,773 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:26,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:26,973 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash 212027308, now seen corresponding path program 53 times [2021-05-21 20:44:26,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:26,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117420971] [2021-05-21 20:44:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:26,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:26,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117420971] [2021-05-21 20:44:26,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117420971] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:26,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:26,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:26,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716442486] [2021-05-21 20:44:26,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:26,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:26,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:26,999 INFO L87 Difference]: Start difference. First operand 135 states and 409 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:27,060 INFO L93 Difference]: Finished difference Result 213 states and 580 transitions. [2021-05-21 20:44:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:27,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:27,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:27,061 INFO L225 Difference]: With dead ends: 213 [2021-05-21 20:44:27,061 INFO L226 Difference]: Without dead ends: 209 [2021-05-21 20:44:27,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-21 20:44:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 139. [2021-05-21 20:44:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.028985507246377) internal successors, (418), 138 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 418 transitions. [2021-05-21 20:44:27,063 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 418 transitions. Word has length 16 [2021-05-21 20:44:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:27,063 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 418 transitions. [2021-05-21 20:44:27,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 418 transitions. [2021-05-21 20:44:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:27,063 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:27,063 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:27,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360 [2021-05-21 20:44:27,063 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash 138654828, now seen corresponding path program 54 times [2021-05-21 20:44:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:27,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277132828] [2021-05-21 20:44:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:27,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:27,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277132828] [2021-05-21 20:44:27,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277132828] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:27,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:27,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:27,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304226902] [2021-05-21 20:44:27,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:27,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:27,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:27,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:27,089 INFO L87 Difference]: Start difference. First operand 139 states and 418 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:27,154 INFO L93 Difference]: Finished difference Result 211 states and 577 transitions. [2021-05-21 20:44:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:27,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:27,155 INFO L225 Difference]: With dead ends: 211 [2021-05-21 20:44:27,155 INFO L226 Difference]: Without dead ends: 208 [2021-05-21 20:44:27,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-21 20:44:27,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 137. [2021-05-21 20:44:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.036764705882353) internal successors, (413), 136 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 413 transitions. [2021-05-21 20:44:27,157 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 413 transitions. Word has length 16 [2021-05-21 20:44:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:27,157 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 413 transitions. [2021-05-21 20:44:27,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 413 transitions. [2021-05-21 20:44:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:27,157 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:27,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:27,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361 [2021-05-21 20:44:27,158 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash 141280604, now seen corresponding path program 55 times [2021-05-21 20:44:27,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:27,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982223912] [2021-05-21 20:44:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:27,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:27,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982223912] [2021-05-21 20:44:27,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982223912] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:27,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:27,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:27,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035848114] [2021-05-21 20:44:27,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:27,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:27,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:27,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:27,185 INFO L87 Difference]: Start difference. First operand 137 states and 413 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:27,247 INFO L93 Difference]: Finished difference Result 199 states and 559 transitions. [2021-05-21 20:44:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:27,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:27,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:27,247 INFO L225 Difference]: With dead ends: 199 [2021-05-21 20:44:27,247 INFO L226 Difference]: Without dead ends: 194 [2021-05-21 20:44:27,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:27,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-21 20:44:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 136. [2021-05-21 20:44:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.037037037037037) internal successors, (410), 135 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 410 transitions. [2021-05-21 20:44:27,249 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 410 transitions. Word has length 16 [2021-05-21 20:44:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:27,249 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 410 transitions. [2021-05-21 20:44:27,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 410 transitions. [2021-05-21 20:44:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:27,249 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:27,250 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:27,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362 [2021-05-21 20:44:27,250 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:27,250 INFO L82 PathProgramCache]: Analyzing trace with hash 567039630, now seen corresponding path program 56 times [2021-05-21 20:44:27,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:27,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265645677] [2021-05-21 20:44:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:27,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:27,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265645677] [2021-05-21 20:44:27,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265645677] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:27,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:27,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:27,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212367093] [2021-05-21 20:44:27,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:27,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:27,277 INFO L87 Difference]: Start difference. First operand 136 states and 410 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:27,367 INFO L93 Difference]: Finished difference Result 169 states and 478 transitions. [2021-05-21 20:44:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:27,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:27,367 INFO L225 Difference]: With dead ends: 169 [2021-05-21 20:44:27,367 INFO L226 Difference]: Without dead ends: 166 [2021-05-21 20:44:27,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-21 20:44:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 143. [2021-05-21 20:44:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.992957746478873) internal successors, (425), 142 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 425 transitions. [2021-05-21 20:44:27,369 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 425 transitions. Word has length 16 [2021-05-21 20:44:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:27,369 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 425 transitions. [2021-05-21 20:44:27,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 425 transitions. [2021-05-21 20:44:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:27,370 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:27,370 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:27,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363 [2021-05-21 20:44:27,370 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:27,370 INFO L82 PathProgramCache]: Analyzing trace with hash -530287946, now seen corresponding path program 57 times [2021-05-21 20:44:27,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:27,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653359569] [2021-05-21 20:44:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:27,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:27,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653359569] [2021-05-21 20:44:27,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653359569] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:27,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:27,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:27,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180401202] [2021-05-21 20:44:27,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:27,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:27,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:27,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:27,401 INFO L87 Difference]: Start difference. First operand 143 states and 425 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:27,494 INFO L93 Difference]: Finished difference Result 168 states and 476 transitions. [2021-05-21 20:44:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:27,495 INFO L225 Difference]: With dead ends: 168 [2021-05-21 20:44:27,495 INFO L226 Difference]: Without dead ends: 165 [2021-05-21 20:44:27,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-21 20:44:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2021-05-21 20:44:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.99290780141844) internal successors, (422), 141 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 422 transitions. [2021-05-21 20:44:27,496 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 422 transitions. Word has length 16 [2021-05-21 20:44:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:27,497 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 422 transitions. [2021-05-21 20:44:27,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 422 transitions. [2021-05-21 20:44:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:27,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:27,497 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:27,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364 [2021-05-21 20:44:27,497 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1618508590, now seen corresponding path program 58 times [2021-05-21 20:44:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:27,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959466566] [2021-05-21 20:44:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:27,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:27,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959466566] [2021-05-21 20:44:27,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959466566] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:27,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:27,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:27,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658368549] [2021-05-21 20:44:27,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:27,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:27,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:27,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:27,526 INFO L87 Difference]: Start difference. First operand 142 states and 422 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:27,603 INFO L93 Difference]: Finished difference Result 155 states and 456 transitions. [2021-05-21 20:44:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:27,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:27,603 INFO L225 Difference]: With dead ends: 155 [2021-05-21 20:44:27,603 INFO L226 Difference]: Without dead ends: 150 [2021-05-21 20:44:27,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-21 20:44:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-05-21 20:44:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.0296296296296297) internal successors, (409), 135 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 409 transitions. [2021-05-21 20:44:27,605 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 409 transitions. Word has length 16 [2021-05-21 20:44:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:27,605 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 409 transitions. [2021-05-21 20:44:27,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 409 transitions. [2021-05-21 20:44:27,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:27,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:27,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:27,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365 [2021-05-21 20:44:27,606 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:27,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:27,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1191391966, now seen corresponding path program 56 times [2021-05-21 20:44:27,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:27,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27598000] [2021-05-21 20:44:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:27,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:27,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27598000] [2021-05-21 20:44:27,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27598000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:27,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432276897] [2021-05-21 20:44:27,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:27,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:27,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:27,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:27,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:27,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432276897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:27,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:27,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:27,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49514364] [2021-05-21 20:44:27,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:27,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:27,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:27,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:27,723 INFO L87 Difference]: Start difference. First operand 136 states and 409 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:27,799 INFO L93 Difference]: Finished difference Result 201 states and 566 transitions. [2021-05-21 20:44:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:27,800 INFO L225 Difference]: With dead ends: 201 [2021-05-21 20:44:27,800 INFO L226 Difference]: Without dead ends: 201 [2021-05-21 20:44:27,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:27,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-21 20:44:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 135. [2021-05-21 20:44:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.985074626865672) internal successors, (400), 134 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 400 transitions. [2021-05-21 20:44:27,802 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 400 transitions. Word has length 16 [2021-05-21 20:44:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:27,802 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 400 transitions. [2021-05-21 20:44:27,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 400 transitions. [2021-05-21 20:44:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:27,802 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:27,802 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:28,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-05-21 20:44:28,003 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:28,003 INFO L82 PathProgramCache]: Analyzing trace with hash 170164140, now seen corresponding path program 57 times [2021-05-21 20:44:28,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:28,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471537012] [2021-05-21 20:44:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:28,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:28,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471537012] [2021-05-21 20:44:28,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471537012] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:28,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:28,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:28,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939181356] [2021-05-21 20:44:28,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:28,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:28,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:28,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:28,030 INFO L87 Difference]: Start difference. First operand 135 states and 400 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:28,096 INFO L93 Difference]: Finished difference Result 197 states and 549 transitions. [2021-05-21 20:44:28,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:28,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:28,096 INFO L225 Difference]: With dead ends: 197 [2021-05-21 20:44:28,096 INFO L226 Difference]: Without dead ends: 195 [2021-05-21 20:44:28,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-21 20:44:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 133. [2021-05-21 20:44:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 132 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 392 transitions. [2021-05-21 20:44:28,098 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 392 transitions. Word has length 16 [2021-05-21 20:44:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:28,098 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 392 transitions. [2021-05-21 20:44:28,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 392 transitions. [2021-05-21 20:44:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:28,098 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:28,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:28,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367 [2021-05-21 20:44:28,099 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:28,099 INFO L82 PathProgramCache]: Analyzing trace with hash -365065662, now seen corresponding path program 58 times [2021-05-21 20:44:28,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:28,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165061370] [2021-05-21 20:44:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:28,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165061370] [2021-05-21 20:44:28,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165061370] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:28,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:28,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:28,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029168818] [2021-05-21 20:44:28,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:28,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:28,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:28,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:28,123 INFO L87 Difference]: Start difference. First operand 133 states and 392 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:28,181 INFO L93 Difference]: Finished difference Result 174 states and 499 transitions. [2021-05-21 20:44:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:28,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:28,181 INFO L225 Difference]: With dead ends: 174 [2021-05-21 20:44:28,181 INFO L226 Difference]: Without dead ends: 170 [2021-05-21 20:44:28,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-21 20:44:28,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 126. [2021-05-21 20:44:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.008) internal successors, (376), 125 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 376 transitions. [2021-05-21 20:44:28,183 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 376 transitions. Word has length 16 [2021-05-21 20:44:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:28,183 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 376 transitions. [2021-05-21 20:44:28,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 376 transitions. [2021-05-21 20:44:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:28,183 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:28,183 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:28,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368 [2021-05-21 20:44:28,183 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash -559894012, now seen corresponding path program 59 times [2021-05-21 20:44:28,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:28,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714267253] [2021-05-21 20:44:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:28,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:28,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714267253] [2021-05-21 20:44:28,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714267253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:28,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237675353] [2021-05-21 20:44:28,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:28,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:28,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:28,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:28,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:28,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237675353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:28,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:28,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:28,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902126753] [2021-05-21 20:44:28,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:28,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:28,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:28,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:28,290 INFO L87 Difference]: Start difference. First operand 126 states and 376 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:28,365 INFO L93 Difference]: Finished difference Result 200 states and 564 transitions. [2021-05-21 20:44:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:28,365 INFO L225 Difference]: With dead ends: 200 [2021-05-21 20:44:28,365 INFO L226 Difference]: Without dead ends: 200 [2021-05-21 20:44:28,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-21 20:44:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 129. [2021-05-21 20:44:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0546875) internal successors, (391), 128 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 391 transitions. [2021-05-21 20:44:28,367 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 391 transitions. Word has length 16 [2021-05-21 20:44:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:28,367 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 391 transitions. [2021-05-21 20:44:28,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 391 transitions. [2021-05-21 20:44:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:28,368 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:28,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:28,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-05-21 20:44:28,568 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:28,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:28,568 INFO L82 PathProgramCache]: Analyzing trace with hash 635142162, now seen corresponding path program 59 times [2021-05-21 20:44:28,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:28,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393709818] [2021-05-21 20:44:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:28,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:28,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393709818] [2021-05-21 20:44:28,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393709818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:28,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563145440] [2021-05-21 20:44:28,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:28,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:28,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:28,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:28,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563145440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:28,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:28,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:28,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108089530] [2021-05-21 20:44:28,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:28,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:28,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:28,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:28,659 INFO L87 Difference]: Start difference. First operand 129 states and 391 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:28,732 INFO L93 Difference]: Finished difference Result 199 states and 565 transitions. [2021-05-21 20:44:28,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:28,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:28,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:28,732 INFO L225 Difference]: With dead ends: 199 [2021-05-21 20:44:28,732 INFO L226 Difference]: Without dead ends: 195 [2021-05-21 20:44:28,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-21 20:44:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 136. [2021-05-21 20:44:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.0444444444444443) internal successors, (411), 135 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 411 transitions. [2021-05-21 20:44:28,734 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 411 transitions. Word has length 16 [2021-05-21 20:44:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:28,734 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 411 transitions. [2021-05-21 20:44:28,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 411 transitions. [2021-05-21 20:44:28,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:28,735 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:28,735 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:28,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:28,937 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:28,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2064097268, now seen corresponding path program 60 times [2021-05-21 20:44:28,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:28,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020256384] [2021-05-21 20:44:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:28,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:28,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020256384] [2021-05-21 20:44:28,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020256384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:28,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66887553] [2021-05-21 20:44:28,967 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:28,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:28,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:28,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:29,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66887553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:29,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:29,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:29,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670517287] [2021-05-21 20:44:29,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:29,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:29,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:29,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:29,056 INFO L87 Difference]: Start difference. First operand 136 states and 411 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:29,137 INFO L93 Difference]: Finished difference Result 206 states and 579 transitions. [2021-05-21 20:44:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:29,137 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:29,138 INFO L225 Difference]: With dead ends: 206 [2021-05-21 20:44:29,138 INFO L226 Difference]: Without dead ends: 203 [2021-05-21 20:44:29,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-21 20:44:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 136. [2021-05-21 20:44:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.022222222222222) internal successors, (408), 135 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 408 transitions. [2021-05-21 20:44:29,140 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 408 transitions. Word has length 16 [2021-05-21 20:44:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:29,140 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 408 transitions. [2021-05-21 20:44:29,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 408 transitions. [2021-05-21 20:44:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:29,140 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:29,140 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:29,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:29,340 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:29,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1304846584, now seen corresponding path program 60 times [2021-05-21 20:44:29,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:29,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890476290] [2021-05-21 20:44:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:29,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:29,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890476290] [2021-05-21 20:44:29,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890476290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:29,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451423750] [2021-05-21 20:44:29,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:29,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:29,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:29,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451423750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:29,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:29,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:29,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627248488] [2021-05-21 20:44:29,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:29,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:29,430 INFO L87 Difference]: Start difference. First operand 136 states and 408 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:29,508 INFO L93 Difference]: Finished difference Result 201 states and 573 transitions. [2021-05-21 20:44:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:29,508 INFO L225 Difference]: With dead ends: 201 [2021-05-21 20:44:29,508 INFO L226 Difference]: Without dead ends: 201 [2021-05-21 20:44:29,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-21 20:44:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 133. [2021-05-21 20:44:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.022727272727273) internal successors, (399), 132 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) [2021-05-21 20:44:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 399 transitions. [2021-05-21 20:44:29,510 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 399 transitions. Word has length 16 [2021-05-21 20:44:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:29,510 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 399 transitions. [2021-05-21 20:44:29,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 399 transitions. [2021-05-21 20:44:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:29,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:29,511 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:29,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-05-21 20:44:29,711 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1190356588, now seen corresponding path program 61 times [2021-05-21 20:44:29,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:29,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465966566] [2021-05-21 20:44:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:29,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465966566] [2021-05-21 20:44:29,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465966566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006255661] [2021-05-21 20:44:29,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:29,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:29,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006255661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:29,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:29,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:29,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949247445] [2021-05-21 20:44:29,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:29,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:29,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:29,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:29,818 INFO L87 Difference]: Start difference. First operand 133 states and 399 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:29,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:29,888 INFO L93 Difference]: Finished difference Result 199 states and 553 transitions. [2021-05-21 20:44:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:29,889 INFO L225 Difference]: With dead ends: 199 [2021-05-21 20:44:29,889 INFO L226 Difference]: Without dead ends: 193 [2021-05-21 20:44:29,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-21 20:44:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 133. [2021-05-21 20:44:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.0) internal successors, (396), 132 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 396 transitions. [2021-05-21 20:44:29,891 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 396 transitions. Word has length 16 [2021-05-21 20:44:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:29,891 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 396 transitions. [2021-05-21 20:44:29,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 396 transitions. [2021-05-21 20:44:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:29,891 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:29,891 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:30,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:30,097 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1323280610, now seen corresponding path program 61 times [2021-05-21 20:44:30,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:30,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918162598] [2021-05-21 20:44:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:30,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:30,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918162598] [2021-05-21 20:44:30,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918162598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:30,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199974293] [2021-05-21 20:44:30,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:30,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:30,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:30,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199974293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:30,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:30,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:44:30,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145159179] [2021-05-21 20:44:30,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:44:30,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:44:30,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:44:30,191 INFO L87 Difference]: Start difference. First operand 133 states and 396 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:30,266 INFO L93 Difference]: Finished difference Result 220 states and 636 transitions. [2021-05-21 20:44:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:30,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:30,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:30,267 INFO L225 Difference]: With dead ends: 220 [2021-05-21 20:44:30,267 INFO L226 Difference]: Without dead ends: 220 [2021-05-21 20:44:30,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-21 20:44:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 130. [2021-05-21 20:44:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 3.0) internal successors, (387), 129 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 387 transitions. [2021-05-21 20:44:30,268 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 387 transitions. Word has length 16 [2021-05-21 20:44:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:30,269 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 387 transitions. [2021-05-21 20:44:30,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 387 transitions. [2021-05-21 20:44:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:30,269 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:30,269 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:30,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:30,469 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:30,469 INFO L82 PathProgramCache]: Analyzing trace with hash 715054666, now seen corresponding path program 62 times [2021-05-21 20:44:30,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:30,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395680167] [2021-05-21 20:44:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:30,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:30,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395680167] [2021-05-21 20:44:30,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395680167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:30,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587785811] [2021-05-21 20:44:30,517 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:30,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:30,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:30,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:30,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:30,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587785811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:30,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:30,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 20:44:30,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605351639] [2021-05-21 20:44:30,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:30,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:30,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:30,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:30,601 INFO L87 Difference]: Start difference. First operand 130 states and 387 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:30,769 INFO L93 Difference]: Finished difference Result 267 states and 740 transitions. [2021-05-21 20:44:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:30,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:30,769 INFO L225 Difference]: With dead ends: 267 [2021-05-21 20:44:30,769 INFO L226 Difference]: Without dead ends: 267 [2021-05-21 20:44:30,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:44:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-21 20:44:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 138. [2021-05-21 20:44:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.116788321167883) internal successors, (427), 137 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 427 transitions. [2021-05-21 20:44:30,771 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 427 transitions. Word has length 16 [2021-05-21 20:44:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:30,771 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 427 transitions. [2021-05-21 20:44:30,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 427 transitions. [2021-05-21 20:44:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:30,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:30,772 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:30,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:30,972 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:30,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1910090840, now seen corresponding path program 62 times [2021-05-21 20:44:30,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:30,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855234423] [2021-05-21 20:44:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:31,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:31,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855234423] [2021-05-21 20:44:31,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855234423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:31,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424104893] [2021-05-21 20:44:31,014 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:31,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:31,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:31,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:31,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:31,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424104893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:31,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:31,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 20:44:31,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099257082] [2021-05-21 20:44:31,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:31,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:31,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:31,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:31,095 INFO L87 Difference]: Start difference. First operand 138 states and 427 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:31,253 INFO L93 Difference]: Finished difference Result 271 states and 760 transitions. [2021-05-21 20:44:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:31,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:31,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:31,253 INFO L225 Difference]: With dead ends: 271 [2021-05-21 20:44:31,253 INFO L226 Difference]: Without dead ends: 267 [2021-05-21 20:44:31,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:44:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-21 20:44:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 142. [2021-05-21 20:44:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.148936170212766) internal successors, (444), 141 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 444 transitions. [2021-05-21 20:44:31,255 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 444 transitions. Word has length 16 [2021-05-21 20:44:31,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:31,255 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 444 transitions. [2021-05-21 20:44:31,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 444 transitions. [2021-05-21 20:44:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:31,256 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:31,256 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:31,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:31,461 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash -955921350, now seen corresponding path program 63 times [2021-05-21 20:44:31,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:31,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564646577] [2021-05-21 20:44:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:31,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:31,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564646577] [2021-05-21 20:44:31,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564646577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:31,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231017506] [2021-05-21 20:44:31,504 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:31,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:44:31,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:31,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:31,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:31,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231017506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:31,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:31,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 20:44:31,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307097608] [2021-05-21 20:44:31,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:31,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:31,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:31,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:31,584 INFO L87 Difference]: Start difference. First operand 142 states and 444 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:31,732 INFO L93 Difference]: Finished difference Result 260 states and 717 transitions. [2021-05-21 20:44:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:31,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:31,733 INFO L225 Difference]: With dead ends: 260 [2021-05-21 20:44:31,733 INFO L226 Difference]: Without dead ends: 257 [2021-05-21 20:44:31,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:44:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-21 20:44:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 145. [2021-05-21 20:44:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.1041666666666665) internal successors, (447), 144 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 447 transitions. [2021-05-21 20:44:31,735 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 447 transitions. Word has length 16 [2021-05-21 20:44:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:31,735 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 447 transitions. [2021-05-21 20:44:31,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 447 transitions. [2021-05-21 20:44:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:31,735 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:31,735 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:31,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:31,936 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:31,936 INFO L82 PathProgramCache]: Analyzing trace with hash -29897906, now seen corresponding path program 63 times [2021-05-21 20:44:31,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:31,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776073058] [2021-05-21 20:44:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:31,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:31,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776073058] [2021-05-21 20:44:31,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776073058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:31,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265248767] [2021-05-21 20:44:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:32,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:44:32,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:32,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:32,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265248767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:32,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:32,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 20:44:32,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755226898] [2021-05-21 20:44:32,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:32,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:32,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:32,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:32,059 INFO L87 Difference]: Start difference. First operand 145 states and 447 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:32,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:32,244 INFO L93 Difference]: Finished difference Result 278 states and 788 transitions. [2021-05-21 20:44:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:32,245 INFO L225 Difference]: With dead ends: 278 [2021-05-21 20:44:32,245 INFO L226 Difference]: Without dead ends: 278 [2021-05-21 20:44:32,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:44:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-21 20:44:32,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 139. [2021-05-21 20:44:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.0652173913043477) internal successors, (423), 138 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 423 transitions. [2021-05-21 20:44:32,247 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 423 transitions. Word has length 16 [2021-05-21 20:44:32,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:32,247 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 423 transitions. [2021-05-21 20:44:32,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 423 transitions. [2021-05-21 20:44:32,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:32,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:32,247 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:32,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-05-21 20:44:32,461 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1057638178, now seen corresponding path program 64 times [2021-05-21 20:44:32,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:32,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171302307] [2021-05-21 20:44:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:32,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:32,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171302307] [2021-05-21 20:44:32,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171302307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:32,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712375537] [2021-05-21 20:44:32,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:32,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:32,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:32,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712375537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:32,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:32,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:32,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018816395] [2021-05-21 20:44:32,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:32,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:32,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:32,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:32,594 INFO L87 Difference]: Start difference. First operand 139 states and 423 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:32,687 INFO L93 Difference]: Finished difference Result 239 states and 660 transitions. [2021-05-21 20:44:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:32,688 INFO L225 Difference]: With dead ends: 239 [2021-05-21 20:44:32,688 INFO L226 Difference]: Without dead ends: 239 [2021-05-21 20:44:32,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-21 20:44:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 134. [2021-05-21 20:44:32,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.045112781954887) internal successors, (405), 133 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 405 transitions. [2021-05-21 20:44:32,690 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 405 transitions. Word has length 16 [2021-05-21 20:44:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:32,690 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 405 transitions. [2021-05-21 20:44:32,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 405 transitions. [2021-05-21 20:44:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:32,690 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:32,690 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:32,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-05-21 20:44:32,891 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:32,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1265615764, now seen corresponding path program 65 times [2021-05-21 20:44:32,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:32,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903229668] [2021-05-21 20:44:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:32,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:32,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903229668] [2021-05-21 20:44:32,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903229668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:32,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673519296] [2021-05-21 20:44:32,919 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:32,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:32,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:32,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:32,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:32,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673519296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:32,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:32,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:32,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679465528] [2021-05-21 20:44:32,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:32,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:32,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:32,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:32,995 INFO L87 Difference]: Start difference. First operand 134 states and 405 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:33,067 INFO L93 Difference]: Finished difference Result 217 states and 606 transitions. [2021-05-21 20:44:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:33,068 INFO L225 Difference]: With dead ends: 217 [2021-05-21 20:44:33,068 INFO L226 Difference]: Without dead ends: 215 [2021-05-21 20:44:33,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-21 20:44:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 132. [2021-05-21 20:44:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.030534351145038) internal successors, (397), 131 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 397 transitions. [2021-05-21 20:44:33,070 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 397 transitions. Word has length 16 [2021-05-21 20:44:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:33,070 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 397 transitions. [2021-05-21 20:44:33,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 397 transitions. [2021-05-21 20:44:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:33,070 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:33,070 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:33,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:33,271 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1168657166, now seen corresponding path program 64 times [2021-05-21 20:44:33,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:33,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841603053] [2021-05-21 20:44:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:33,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:33,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841603053] [2021-05-21 20:44:33,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841603053] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:33,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:33,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:33,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643311872] [2021-05-21 20:44:33,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:33,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:33,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:33,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:33,296 INFO L87 Difference]: Start difference. First operand 132 states and 397 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:33,364 INFO L93 Difference]: Finished difference Result 227 states and 624 transitions. [2021-05-21 20:44:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:33,364 INFO L225 Difference]: With dead ends: 227 [2021-05-21 20:44:33,364 INFO L226 Difference]: Without dead ends: 223 [2021-05-21 20:44:33,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-21 20:44:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 134. [2021-05-21 20:44:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.0150375939849625) internal successors, (401), 133 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 401 transitions. [2021-05-21 20:44:33,366 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 401 transitions. Word has length 16 [2021-05-21 20:44:33,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:33,366 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 401 transitions. [2021-05-21 20:44:33,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 401 transitions. [2021-05-21 20:44:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:33,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:33,367 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:33,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393 [2021-05-21 20:44:33,367 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1095284686, now seen corresponding path program 65 times [2021-05-21 20:44:33,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:33,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731649294] [2021-05-21 20:44:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:33,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:33,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731649294] [2021-05-21 20:44:33,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731649294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:33,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:33,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:33,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927202594] [2021-05-21 20:44:33,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:33,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:33,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:33,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:33,394 INFO L87 Difference]: Start difference. First operand 134 states and 401 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:33,461 INFO L93 Difference]: Finished difference Result 210 states and 598 transitions. [2021-05-21 20:44:33,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:33,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:33,462 INFO L225 Difference]: With dead ends: 210 [2021-05-21 20:44:33,462 INFO L226 Difference]: Without dead ends: 207 [2021-05-21 20:44:33,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-21 20:44:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 133. [2021-05-21 20:44:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.015151515151515) internal successors, (398), 132 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) [2021-05-21 20:44:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 398 transitions. [2021-05-21 20:44:33,464 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 398 transitions. Word has length 16 [2021-05-21 20:44:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:33,464 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 398 transitions. [2021-05-21 20:44:33,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 398 transitions. [2021-05-21 20:44:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:33,464 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:33,464 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:33,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394 [2021-05-21 20:44:33,464 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:33,464 INFO L82 PathProgramCache]: Analyzing trace with hash 429577900, now seen corresponding path program 66 times [2021-05-21 20:44:33,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:33,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791139611] [2021-05-21 20:44:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:33,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:33,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791139611] [2021-05-21 20:44:33,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791139611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:33,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:33,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:33,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739484757] [2021-05-21 20:44:33,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:33,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:33,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:33,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:33,492 INFO L87 Difference]: Start difference. First operand 133 states and 398 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:33,564 INFO L93 Difference]: Finished difference Result 227 states and 615 transitions. [2021-05-21 20:44:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:33,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:33,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:33,564 INFO L225 Difference]: With dead ends: 227 [2021-05-21 20:44:33,564 INFO L226 Difference]: Without dead ends: 224 [2021-05-21 20:44:33,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-21 20:44:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 138. [2021-05-21 20:44:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.978102189781022) internal successors, (408), 137 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 408 transitions. [2021-05-21 20:44:33,566 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 408 transitions. Word has length 16 [2021-05-21 20:44:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:33,566 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 408 transitions. [2021-05-21 20:44:33,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 408 transitions. [2021-05-21 20:44:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:33,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:33,567 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:33,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395 [2021-05-21 20:44:33,567 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:33,567 INFO L82 PathProgramCache]: Analyzing trace with hash -667749676, now seen corresponding path program 67 times [2021-05-21 20:44:33,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:33,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291707929] [2021-05-21 20:44:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:33,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:33,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291707929] [2021-05-21 20:44:33,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291707929] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:33,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:33,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:33,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681572949] [2021-05-21 20:44:33,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:33,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:33,594 INFO L87 Difference]: Start difference. First operand 138 states and 408 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:33,665 INFO L93 Difference]: Finished difference Result 214 states and 596 transitions. [2021-05-21 20:44:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:33,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:33,666 INFO L225 Difference]: With dead ends: 214 [2021-05-21 20:44:33,666 INFO L226 Difference]: Without dead ends: 211 [2021-05-21 20:44:33,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-21 20:44:33,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 133. [2021-05-21 20:44:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.007575757575758) internal successors, (397), 132 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 397 transitions. [2021-05-21 20:44:33,668 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 397 transitions. Word has length 16 [2021-05-21 20:44:33,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:33,668 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 397 transitions. [2021-05-21 20:44:33,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 397 transitions. [2021-05-21 20:44:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:33,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:33,668 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:33,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396 [2021-05-21 20:44:33,668 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:33,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:33,668 INFO L82 PathProgramCache]: Analyzing trace with hash 271584158, now seen corresponding path program 66 times [2021-05-21 20:44:33,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:33,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583787416] [2021-05-21 20:44:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:33,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:33,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583787416] [2021-05-21 20:44:33,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583787416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:33,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216386511] [2021-05-21 20:44:33,702 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:33,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:44:33,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:33,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:33,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:33,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216386511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:33,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:33,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:33,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746379532] [2021-05-21 20:44:33,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:33,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:33,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:33,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:33,771 INFO L87 Difference]: Start difference. First operand 133 states and 397 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:33,847 INFO L93 Difference]: Finished difference Result 240 states and 672 transitions. [2021-05-21 20:44:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:33,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:33,848 INFO L225 Difference]: With dead ends: 240 [2021-05-21 20:44:33,848 INFO L226 Difference]: Without dead ends: 240 [2021-05-21 20:44:33,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-21 20:44:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 135. [2021-05-21 20:44:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.0223880597014925) internal successors, (405), 134 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 405 transitions. [2021-05-21 20:44:33,850 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 405 transitions. Word has length 16 [2021-05-21 20:44:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:33,850 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 405 transitions. [2021-05-21 20:44:33,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 405 transitions. [2021-05-21 20:44:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:33,850 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:33,850 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:34,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:34,051 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1633140264, now seen corresponding path program 67 times [2021-05-21 20:44:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:34,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081076926] [2021-05-21 20:44:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:34,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:34,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081076926] [2021-05-21 20:44:34,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081076926] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:34,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:34,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:34,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716866657] [2021-05-21 20:44:34,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:34,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:34,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:34,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:34,076 INFO L87 Difference]: Start difference. First operand 135 states and 405 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:34,151 INFO L93 Difference]: Finished difference Result 217 states and 619 transitions. [2021-05-21 20:44:34,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:34,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:34,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:34,152 INFO L225 Difference]: With dead ends: 217 [2021-05-21 20:44:34,152 INFO L226 Difference]: Without dead ends: 215 [2021-05-21 20:44:34,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-21 20:44:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 132. [2021-05-21 20:44:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.0076335877862594) internal successors, (394), 131 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 394 transitions. [2021-05-21 20:44:34,154 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 394 transitions. Word has length 16 [2021-05-21 20:44:34,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:34,154 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 394 transitions. [2021-05-21 20:44:34,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 394 transitions. [2021-05-21 20:44:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:34,154 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:34,154 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:34,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398 [2021-05-21 20:44:34,154 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:34,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1191160378, now seen corresponding path program 68 times [2021-05-21 20:44:34,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:34,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709995156] [2021-05-21 20:44:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:34,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:34,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709995156] [2021-05-21 20:44:34,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709995156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:34,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:34,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:34,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985459001] [2021-05-21 20:44:34,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:34,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:34,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:34,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:34,185 INFO L87 Difference]: Start difference. First operand 132 states and 394 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:34,244 INFO L93 Difference]: Finished difference Result 218 states and 587 transitions. [2021-05-21 20:44:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:34,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:34,245 INFO L225 Difference]: With dead ends: 218 [2021-05-21 20:44:34,245 INFO L226 Difference]: Without dead ends: 212 [2021-05-21 20:44:34,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-21 20:44:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 133. [2021-05-21 20:44:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.992424242424242) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 395 transitions. [2021-05-21 20:44:34,246 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 395 transitions. Word has length 16 [2021-05-21 20:44:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:34,247 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 395 transitions. [2021-05-21 20:44:34,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 395 transitions. [2021-05-21 20:44:34,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:34,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:34,247 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:34,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399 [2021-05-21 20:44:34,247 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:34,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1677206220, now seen corresponding path program 69 times [2021-05-21 20:44:34,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:34,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914994700] [2021-05-21 20:44:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:34,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:34,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914994700] [2021-05-21 20:44:34,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914994700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:34,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:34,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:34,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771576497] [2021-05-21 20:44:34,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:34,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:34,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:34,273 INFO L87 Difference]: Start difference. First operand 133 states and 395 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:34,340 INFO L93 Difference]: Finished difference Result 215 states and 577 transitions. [2021-05-21 20:44:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:34,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:34,341 INFO L225 Difference]: With dead ends: 215 [2021-05-21 20:44:34,341 INFO L226 Difference]: Without dead ends: 212 [2021-05-21 20:44:34,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:34,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-21 20:44:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 138. [2021-05-21 20:44:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.9562043795620436) internal successors, (405), 137 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 405 transitions. [2021-05-21 20:44:34,343 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 405 transitions. Word has length 16 [2021-05-21 20:44:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:34,343 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 405 transitions. [2021-05-21 20:44:34,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 405 transitions. [2021-05-21 20:44:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:34,343 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:34,343 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:34,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400 [2021-05-21 20:44:34,344 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:34,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1520433500, now seen corresponding path program 70 times [2021-05-21 20:44:34,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:34,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377388815] [2021-05-21 20:44:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:34,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:34,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377388815] [2021-05-21 20:44:34,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377388815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:34,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:34,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:34,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482755671] [2021-05-21 20:44:34,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:34,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:34,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:34,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:34,370 INFO L87 Difference]: Start difference. First operand 138 states and 405 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:34,432 INFO L93 Difference]: Finished difference Result 202 states and 558 transitions. [2021-05-21 20:44:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:34,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:34,433 INFO L225 Difference]: With dead ends: 202 [2021-05-21 20:44:34,433 INFO L226 Difference]: Without dead ends: 198 [2021-05-21 20:44:34,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:34,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-21 20:44:34,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 132. [2021-05-21 20:44:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.0) internal successors, (393), 131 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 393 transitions. [2021-05-21 20:44:34,435 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 393 transitions. Word has length 16 [2021-05-21 20:44:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:34,435 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 393 transitions. [2021-05-21 20:44:34,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 393 transitions. [2021-05-21 20:44:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:34,435 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:34,435 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:34,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401 [2021-05-21 20:44:34,435 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash -567271218, now seen corresponding path program 68 times [2021-05-21 20:44:34,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:34,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850222747] [2021-05-21 20:44:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:34,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:34,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850222747] [2021-05-21 20:44:34,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850222747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:34,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015781340] [2021-05-21 20:44:34,461 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:34,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:34,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:34,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:34,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015781340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:34,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:34,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:44:34,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960936096] [2021-05-21 20:44:34,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:44:34,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:44:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:44:34,519 INFO L87 Difference]: Start difference. First operand 132 states and 393 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:34,596 INFO L93 Difference]: Finished difference Result 274 states and 793 transitions. [2021-05-21 20:44:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:34,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:34,597 INFO L225 Difference]: With dead ends: 274 [2021-05-21 20:44:34,597 INFO L226 Difference]: Without dead ends: 274 [2021-05-21 20:44:34,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:34,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-21 20:44:34,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 134. [2021-05-21 20:44:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.0) internal successors, (399), 133 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) [2021-05-21 20:44:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 399 transitions. [2021-05-21 20:44:34,599 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 399 transitions. Word has length 16 [2021-05-21 20:44:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:34,599 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 399 transitions. [2021-05-21 20:44:34,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 399 transitions. [2021-05-21 20:44:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:34,599 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:34,599 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:34,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-05-21 20:44:34,800 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:34,800 INFO L82 PathProgramCache]: Analyzing trace with hash 859329480, now seen corresponding path program 69 times [2021-05-21 20:44:34,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:34,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982615595] [2021-05-21 20:44:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:34,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:34,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982615595] [2021-05-21 20:44:34,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982615595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:34,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911322516] [2021-05-21 20:44:34,827 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:34,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:44:34,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:34,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:34,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:34,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911322516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:34,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:34,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:34,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294129] [2021-05-21 20:44:34,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:34,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:34,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:34,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:34,893 INFO L87 Difference]: Start difference. First operand 134 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:34,989 INFO L93 Difference]: Finished difference Result 253 states and 716 transitions. [2021-05-21 20:44:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:34,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:34,990 INFO L225 Difference]: With dead ends: 253 [2021-05-21 20:44:34,990 INFO L226 Difference]: Without dead ends: 253 [2021-05-21 20:44:34,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-21 20:44:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 136. [2021-05-21 20:44:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.0148148148148146) internal successors, (407), 135 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 407 transitions. [2021-05-21 20:44:34,992 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 407 transitions. Word has length 16 [2021-05-21 20:44:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:34,992 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 407 transitions. [2021-05-21 20:44:34,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 407 transitions. [2021-05-21 20:44:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:34,992 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:34,993 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:35,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-05-21 20:44:35,193 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2074081710, now seen corresponding path program 70 times [2021-05-21 20:44:35,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:35,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086793954] [2021-05-21 20:44:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:35,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:35,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086793954] [2021-05-21 20:44:35,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086793954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:35,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:35,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:35,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638914331] [2021-05-21 20:44:35,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:35,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:35,218 INFO L87 Difference]: Start difference. First operand 136 states and 407 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:35,302 INFO L93 Difference]: Finished difference Result 230 states and 663 transitions. [2021-05-21 20:44:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:35,303 INFO L225 Difference]: With dead ends: 230 [2021-05-21 20:44:35,303 INFO L226 Difference]: Without dead ends: 228 [2021-05-21 20:44:35,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-21 20:44:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 131. [2021-05-21 20:44:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 3.0) internal successors, (390), 130 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 390 transitions. [2021-05-21 20:44:35,304 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 390 transitions. Word has length 16 [2021-05-21 20:44:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:35,305 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 390 transitions. [2021-05-21 20:44:35,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 390 transitions. [2021-05-21 20:44:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:35,305 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:35,305 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:35,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404 [2021-05-21 20:44:35,305 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2096777692, now seen corresponding path program 71 times [2021-05-21 20:44:35,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:35,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537451512] [2021-05-21 20:44:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:35,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:35,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537451512] [2021-05-21 20:44:35,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537451512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:35,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214226022] [2021-05-21 20:44:35,354 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:35,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:35,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:35,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:35,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:35,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214226022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:35,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:35,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 20:44:35,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306905526] [2021-05-21 20:44:35,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:35,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:35,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:35,447 INFO L87 Difference]: Start difference. First operand 131 states and 390 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:35,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:35,610 INFO L93 Difference]: Finished difference Result 217 states and 589 transitions. [2021-05-21 20:44:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:35,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:35,610 INFO L225 Difference]: With dead ends: 217 [2021-05-21 20:44:35,610 INFO L226 Difference]: Without dead ends: 217 [2021-05-21 20:44:35,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:44:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-21 20:44:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 136. [2021-05-21 20:44:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.074074074074074) internal successors, (415), 135 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 415 transitions. [2021-05-21 20:44:35,612 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 415 transitions. Word has length 16 [2021-05-21 20:44:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:35,612 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 415 transitions. [2021-05-21 20:44:35,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 415 transitions. [2021-05-21 20:44:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:35,613 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:35,613 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:35,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:35,816 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:35,817 INFO L82 PathProgramCache]: Analyzing trace with hash -901741518, now seen corresponding path program 71 times [2021-05-21 20:44:35,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:35,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106364890] [2021-05-21 20:44:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:35,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:35,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106364890] [2021-05-21 20:44:35,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106364890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:35,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014292031] [2021-05-21 20:44:35,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:35,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:35,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:35,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:35,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:35,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014292031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:35,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:35,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:35,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563861585] [2021-05-21 20:44:35,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:35,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:35,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:35,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:35,940 INFO L87 Difference]: Start difference. First operand 136 states and 415 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:36,009 INFO L93 Difference]: Finished difference Result 211 states and 579 transitions. [2021-05-21 20:44:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:36,009 INFO L225 Difference]: With dead ends: 211 [2021-05-21 20:44:36,009 INFO L226 Difference]: Without dead ends: 207 [2021-05-21 20:44:36,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-21 20:44:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2021-05-21 20:44:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.1214285714285714) internal successors, (437), 140 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 437 transitions. [2021-05-21 20:44:36,011 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 437 transitions. Word has length 16 [2021-05-21 20:44:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:36,011 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 437 transitions. [2021-05-21 20:44:36,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 437 transitions. [2021-05-21 20:44:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:36,012 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:36,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:36,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:36,212 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash 527213588, now seen corresponding path program 72 times [2021-05-21 20:44:36,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:36,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884517662] [2021-05-21 20:44:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:36,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:36,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884517662] [2021-05-21 20:44:36,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884517662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:36,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176166929] [2021-05-21 20:44:36,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:36,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:36,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:36,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:36,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176166929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:36,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:36,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-21 20:44:36,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471637937] [2021-05-21 20:44:36,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:44:36,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:36,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:44:36,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:36,335 INFO L87 Difference]: Start difference. First operand 141 states and 437 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:36,480 INFO L93 Difference]: Finished difference Result 221 states and 603 transitions. [2021-05-21 20:44:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:36,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:36,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:36,481 INFO L225 Difference]: With dead ends: 221 [2021-05-21 20:44:36,481 INFO L226 Difference]: Without dead ends: 218 [2021-05-21 20:44:36,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:44:36,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-21 20:44:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 144. [2021-05-21 20:44:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 3.076923076923077) internal successors, (440), 143 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 440 transitions. [2021-05-21 20:44:36,483 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 440 transitions. Word has length 16 [2021-05-21 20:44:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:36,483 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 440 transitions. [2021-05-21 20:44:36,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 440 transitions. [2021-05-21 20:44:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:36,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:36,484 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:36,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:36,689 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:36,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1453237032, now seen corresponding path program 72 times [2021-05-21 20:44:36,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:36,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755282872] [2021-05-21 20:44:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:36,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:36,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755282872] [2021-05-21 20:44:36,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755282872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:36,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648891049] [2021-05-21 20:44:36,721 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:36,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:36,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:36,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:36,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:36,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648891049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:36,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:36,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:36,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512730454] [2021-05-21 20:44:36,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:36,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:36,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:36,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:36,801 INFO L87 Difference]: Start difference. First operand 144 states and 440 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:36,884 INFO L93 Difference]: Finished difference Result 220 states and 605 transitions. [2021-05-21 20:44:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:36,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:36,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:36,885 INFO L225 Difference]: With dead ends: 220 [2021-05-21 20:44:36,885 INFO L226 Difference]: Without dead ends: 220 [2021-05-21 20:44:36,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-21 20:44:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 138. [2021-05-21 20:44:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0364963503649633) internal successors, (416), 137 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 416 transitions. [2021-05-21 20:44:36,887 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 416 transitions. Word has length 16 [2021-05-21 20:44:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:36,887 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 416 transitions. [2021-05-21 20:44:36,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 416 transitions. [2021-05-21 20:44:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:36,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:36,888 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:37,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:37,088 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:37,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1754194180, now seen corresponding path program 73 times [2021-05-21 20:44:37,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:37,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772608741] [2021-05-21 20:44:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:37,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772608741] [2021-05-21 20:44:37,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772608741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145184755] [2021-05-21 20:44:37,119 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:37,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145184755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:37,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:37,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:37,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892816203] [2021-05-21 20:44:37,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:37,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:37,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:37,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:37,207 INFO L87 Difference]: Start difference. First operand 138 states and 416 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:37,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:37,289 INFO L93 Difference]: Finished difference Result 250 states and 667 transitions. [2021-05-21 20:44:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:37,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:37,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:37,290 INFO L225 Difference]: With dead ends: 250 [2021-05-21 20:44:37,290 INFO L226 Difference]: Without dead ends: 250 [2021-05-21 20:44:37,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-21 20:44:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 140. [2021-05-21 20:44:37,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.050359712230216) internal successors, (424), 139 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 424 transitions. [2021-05-21 20:44:37,292 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 424 transitions. Word has length 16 [2021-05-21 20:44:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:37,292 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 424 transitions. [2021-05-21 20:44:37,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 424 transitions. [2021-05-21 20:44:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:37,293 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:37,293 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:37,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-05-21 20:44:37,493 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash 217519174, now seen corresponding path program 74 times [2021-05-21 20:44:37,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:37,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007208332] [2021-05-21 20:44:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:37,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:37,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007208332] [2021-05-21 20:44:37,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007208332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:37,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167148968] [2021-05-21 20:44:37,522 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:37,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:37,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:37,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:37,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:37,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167148968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:37,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:37,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:37,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336078012] [2021-05-21 20:44:37,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:37,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:37,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:37,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:37,601 INFO L87 Difference]: Start difference. First operand 140 states and 424 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:37,672 INFO L93 Difference]: Finished difference Result 228 states and 613 transitions. [2021-05-21 20:44:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:37,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:37,673 INFO L225 Difference]: With dead ends: 228 [2021-05-21 20:44:37,673 INFO L226 Difference]: Without dead ends: 226 [2021-05-21 20:44:37,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-21 20:44:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 138. [2021-05-21 20:44:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0364963503649633) internal successors, (416), 137 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 416 transitions. [2021-05-21 20:44:37,675 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 416 transitions. Word has length 16 [2021-05-21 20:44:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:37,675 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 416 transitions. [2021-05-21 20:44:37,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 416 transitions. [2021-05-21 20:44:37,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:37,675 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:37,675 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:37,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-05-21 20:44:37,893 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:37,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1643175192, now seen corresponding path program 73 times [2021-05-21 20:44:37,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:37,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458181565] [2021-05-21 20:44:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:37,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:37,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458181565] [2021-05-21 20:44:37,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458181565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:37,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:37,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:37,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476712282] [2021-05-21 20:44:37,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:37,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:37,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:37,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:37,920 INFO L87 Difference]: Start difference. First operand 138 states and 416 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:38,013 INFO L93 Difference]: Finished difference Result 235 states and 620 transitions. [2021-05-21 20:44:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:38,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:38,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:38,014 INFO L225 Difference]: With dead ends: 235 [2021-05-21 20:44:38,014 INFO L226 Difference]: Without dead ends: 231 [2021-05-21 20:44:38,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:38,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-21 20:44:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2021-05-21 20:44:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.0215827338129495) internal successors, (420), 139 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 420 transitions. [2021-05-21 20:44:38,016 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 420 transitions. Word has length 16 [2021-05-21 20:44:38,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:38,016 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 420 transitions. [2021-05-21 20:44:38,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,016 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 420 transitions. [2021-05-21 20:44:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:38,016 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:38,016 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:38,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417 [2021-05-21 20:44:38,016 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1716547672, now seen corresponding path program 74 times [2021-05-21 20:44:38,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:38,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052207310] [2021-05-21 20:44:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:38,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:38,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052207310] [2021-05-21 20:44:38,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052207310] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:38,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:38,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:38,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127003873] [2021-05-21 20:44:38,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:38,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:38,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:38,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:38,043 INFO L87 Difference]: Start difference. First operand 140 states and 420 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:38,139 INFO L93 Difference]: Finished difference Result 218 states and 594 transitions. [2021-05-21 20:44:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:38,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:38,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:38,139 INFO L225 Difference]: With dead ends: 218 [2021-05-21 20:44:38,139 INFO L226 Difference]: Without dead ends: 215 [2021-05-21 20:44:38,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-21 20:44:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 138. [2021-05-21 20:44:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0291970802919708) internal successors, (415), 137 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 415 transitions. [2021-05-21 20:44:38,141 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 415 transitions. Word has length 16 [2021-05-21 20:44:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:38,141 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 415 transitions. [2021-05-21 20:44:38,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 415 transitions. [2021-05-21 20:44:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:38,142 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:38,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:38,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418 [2021-05-21 20:44:38,142 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:38,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1912712838, now seen corresponding path program 75 times [2021-05-21 20:44:38,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:38,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630103298] [2021-05-21 20:44:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:38,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:38,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630103298] [2021-05-21 20:44:38,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630103298] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:38,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:38,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:38,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677802976] [2021-05-21 20:44:38,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:38,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:38,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:38,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:38,172 INFO L87 Difference]: Start difference. First operand 138 states and 415 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:38,242 INFO L93 Difference]: Finished difference Result 235 states and 613 transitions. [2021-05-21 20:44:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:38,242 INFO L225 Difference]: With dead ends: 235 [2021-05-21 20:44:38,242 INFO L226 Difference]: Without dead ends: 232 [2021-05-21 20:44:38,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-21 20:44:38,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 140. [2021-05-21 20:44:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.014388489208633) internal successors, (419), 139 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 419 transitions. [2021-05-21 20:44:38,245 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 419 transitions. Word has length 16 [2021-05-21 20:44:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:38,245 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 419 transitions. [2021-05-21 20:44:38,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 419 transitions. [2021-05-21 20:44:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:38,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:38,245 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:38,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419 [2021-05-21 20:44:38,245 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash 815385262, now seen corresponding path program 76 times [2021-05-21 20:44:38,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:38,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348099633] [2021-05-21 20:44:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:38,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:38,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348099633] [2021-05-21 20:44:38,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348099633] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:38,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:38,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:38,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188715649] [2021-05-21 20:44:38,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:38,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:38,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:38,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:38,272 INFO L87 Difference]: Start difference. First operand 140 states and 419 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:38,336 INFO L93 Difference]: Finished difference Result 221 states and 592 transitions. [2021-05-21 20:44:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:38,337 INFO L225 Difference]: With dead ends: 221 [2021-05-21 20:44:38,337 INFO L226 Difference]: Without dead ends: 218 [2021-05-21 20:44:38,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-21 20:44:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 139. [2021-05-21 20:44:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.0144927536231885) internal successors, (416), 138 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 416 transitions. [2021-05-21 20:44:38,339 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 416 transitions. Word has length 16 [2021-05-21 20:44:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:38,339 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 416 transitions. [2021-05-21 20:44:38,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 416 transitions. [2021-05-21 20:44:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:38,339 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:38,339 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:38,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420 [2021-05-21 20:44:38,339 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:38,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1754719096, now seen corresponding path program 75 times [2021-05-21 20:44:38,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:38,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996621405] [2021-05-21 20:44:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:38,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:38,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996621405] [2021-05-21 20:44:38,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996621405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:38,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210140721] [2021-05-21 20:44:38,369 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:38,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:44:38,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:38,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:38,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210140721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:38,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:38,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:38,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745256039] [2021-05-21 20:44:38,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:38,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:38,449 INFO L87 Difference]: Start difference. First operand 139 states and 416 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:38,542 INFO L93 Difference]: Finished difference Result 254 states and 684 transitions. [2021-05-21 20:44:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:38,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:38,542 INFO L225 Difference]: With dead ends: 254 [2021-05-21 20:44:38,542 INFO L226 Difference]: Without dead ends: 254 [2021-05-21 20:44:38,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-21 20:44:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 141. [2021-05-21 20:44:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.0285714285714285) internal successors, (424), 140 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 424 transitions. [2021-05-21 20:44:38,544 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 424 transitions. Word has length 16 [2021-05-21 20:44:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:38,545 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 424 transitions. [2021-05-21 20:44:38,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 424 transitions. [2021-05-21 20:44:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:38,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:38,545 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:38,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-05-21 20:44:38,745 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:38,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1178692094, now seen corresponding path program 76 times [2021-05-21 20:44:38,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:38,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537436854] [2021-05-21 20:44:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:38,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:38,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537436854] [2021-05-21 20:44:38,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537436854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:38,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:38,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:38,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160000919] [2021-05-21 20:44:38,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:38,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:38,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:38,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:38,775 INFO L87 Difference]: Start difference. First operand 141 states and 424 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:38,872 INFO L93 Difference]: Finished difference Result 228 states and 620 transitions. [2021-05-21 20:44:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:38,873 INFO L225 Difference]: With dead ends: 228 [2021-05-21 20:44:38,873 INFO L226 Difference]: Without dead ends: 226 [2021-05-21 20:44:38,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-21 20:44:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 137. [2021-05-21 20:44:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0) internal successors, (408), 136 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 408 transitions. [2021-05-21 20:44:38,875 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 408 transitions. Word has length 16 [2021-05-21 20:44:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:38,875 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 408 transitions. [2021-05-21 20:44:38,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 408 transitions. [2021-05-21 20:44:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:38,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:38,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:38,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422 [2021-05-21 20:44:38,876 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:38,876 INFO L82 PathProgramCache]: Analyzing trace with hash 433988996, now seen corresponding path program 77 times [2021-05-21 20:44:38,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:38,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891625440] [2021-05-21 20:44:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:38,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:38,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891625440] [2021-05-21 20:44:38,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891625440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:38,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702803202] [2021-05-21 20:44:38,906 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:38,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:44:38,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:38,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:38,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:38,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702803202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:38,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:38,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:38,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664871322] [2021-05-21 20:44:38,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:38,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:38,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:38,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:38,987 INFO L87 Difference]: Start difference. First operand 137 states and 408 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:39,073 INFO L93 Difference]: Finished difference Result 206 states and 557 transitions. [2021-05-21 20:44:39,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:39,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:39,074 INFO L225 Difference]: With dead ends: 206 [2021-05-21 20:44:39,074 INFO L226 Difference]: Without dead ends: 206 [2021-05-21 20:44:39,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-21 20:44:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2021-05-21 20:44:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.9555555555555557) internal successors, (399), 135 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) [2021-05-21 20:44:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 399 transitions. [2021-05-21 20:44:39,076 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 399 transitions. Word has length 16 [2021-05-21 20:44:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:39,076 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 399 transitions. [2021-05-21 20:44:39,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 399 transitions. [2021-05-21 20:44:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:39,076 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:39,076 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:39,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:39,277 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1889264946, now seen corresponding path program 78 times [2021-05-21 20:44:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:39,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220941314] [2021-05-21 20:44:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:39,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:39,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220941314] [2021-05-21 20:44:39,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220941314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:39,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279830229] [2021-05-21 20:44:39,308 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:39,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:39,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:39,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:39,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:39,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279830229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:39,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:39,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:39,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774085837] [2021-05-21 20:44:39,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:39,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:39,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:39,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:39,383 INFO L87 Difference]: Start difference. First operand 136 states and 399 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:39,455 INFO L93 Difference]: Finished difference Result 197 states and 530 transitions. [2021-05-21 20:44:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:39,455 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:39,456 INFO L225 Difference]: With dead ends: 197 [2021-05-21 20:44:39,456 INFO L226 Difference]: Without dead ends: 195 [2021-05-21 20:44:39,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-21 20:44:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2021-05-21 20:44:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.9689922480620154) internal successors, (383), 129 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 383 transitions. [2021-05-21 20:44:39,457 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 383 transitions. Word has length 16 [2021-05-21 20:44:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:39,457 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 383 transitions. [2021-05-21 20:44:39,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 383 transitions. [2021-05-21 20:44:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:39,458 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:39,458 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:39,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-05-21 20:44:39,658 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:39,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1506544558, now seen corresponding path program 79 times [2021-05-21 20:44:39,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:39,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056452123] [2021-05-21 20:44:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:39,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:39,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056452123] [2021-05-21 20:44:39,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056452123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:39,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457707938] [2021-05-21 20:44:39,685 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:39,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:39,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:39,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457707938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:39,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:39,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:39,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86097375] [2021-05-21 20:44:39,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:39,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:39,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:39,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:39,752 INFO L87 Difference]: Start difference. First operand 130 states and 383 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:39,815 INFO L93 Difference]: Finished difference Result 176 states and 481 transitions. [2021-05-21 20:44:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:39,816 INFO L225 Difference]: With dead ends: 176 [2021-05-21 20:44:39,816 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:44:39,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:44:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 128. [2021-05-21 20:44:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.952755905511811) internal successors, (375), 127 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 375 transitions. [2021-05-21 20:44:39,818 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 375 transitions. Word has length 16 [2021-05-21 20:44:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:39,818 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 375 transitions. [2021-05-21 20:44:39,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 375 transitions. [2021-05-21 20:44:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:39,818 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:39,818 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:40,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-05-21 20:44:40,019 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:40,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:40,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1055429870, now seen corresponding path program 77 times [2021-05-21 20:44:40,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:40,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112277432] [2021-05-21 20:44:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:40,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:40,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112277432] [2021-05-21 20:44:40,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112277432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:40,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:40,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:40,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048200675] [2021-05-21 20:44:40,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:40,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:40,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:40,044 INFO L87 Difference]: Start difference. First operand 128 states and 375 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:40,137 INFO L93 Difference]: Finished difference Result 175 states and 467 transitions. [2021-05-21 20:44:40,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:40,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:40,138 INFO L225 Difference]: With dead ends: 175 [2021-05-21 20:44:40,138 INFO L226 Difference]: Without dead ends: 171 [2021-05-21 20:44:40,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-21 20:44:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 132. [2021-05-21 20:44:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.931297709923664) internal successors, (384), 131 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 384 transitions. [2021-05-21 20:44:40,139 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 384 transitions. Word has length 16 [2021-05-21 20:44:40,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:40,139 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 384 transitions. [2021-05-21 20:44:40,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,139 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 384 transitions. [2021-05-21 20:44:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:40,140 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:40,140 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:40,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430 [2021-05-21 20:44:40,140 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:40,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1128802350, now seen corresponding path program 78 times [2021-05-21 20:44:40,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:40,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145344164] [2021-05-21 20:44:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:40,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:40,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145344164] [2021-05-21 20:44:40,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145344164] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:40,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:40,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:40,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18080289] [2021-05-21 20:44:40,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:40,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:40,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:40,169 INFO L87 Difference]: Start difference. First operand 132 states and 384 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:40,271 INFO L93 Difference]: Finished difference Result 173 states and 464 transitions. [2021-05-21 20:44:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:40,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:40,272 INFO L225 Difference]: With dead ends: 173 [2021-05-21 20:44:40,272 INFO L226 Difference]: Without dead ends: 170 [2021-05-21 20:44:40,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-21 20:44:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 130. [2021-05-21 20:44:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.937984496124031) internal successors, (379), 129 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 379 transitions. [2021-05-21 20:44:40,273 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 379 transitions. Word has length 16 [2021-05-21 20:44:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:40,274 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 379 transitions. [2021-05-21 20:44:40,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 379 transitions. [2021-05-21 20:44:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:40,274 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:40,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:40,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431 [2021-05-21 20:44:40,274 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:40,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1126176574, now seen corresponding path program 79 times [2021-05-21 20:44:40,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:40,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640717817] [2021-05-21 20:44:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:40,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:40,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640717817] [2021-05-21 20:44:40,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640717817] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:40,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:40,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:40,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689052284] [2021-05-21 20:44:40,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:40,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:40,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:40,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:40,311 INFO L87 Difference]: Start difference. First operand 130 states and 379 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:40,391 INFO L93 Difference]: Finished difference Result 161 states and 446 transitions. [2021-05-21 20:44:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:40,392 INFO L225 Difference]: With dead ends: 161 [2021-05-21 20:44:40,392 INFO L226 Difference]: Without dead ends: 156 [2021-05-21 20:44:40,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-21 20:44:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2021-05-21 20:44:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9375) internal successors, (376), 128 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 376 transitions. [2021-05-21 20:44:40,393 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 376 transitions. Word has length 16 [2021-05-21 20:44:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:40,393 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 376 transitions. [2021-05-21 20:44:40,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,393 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 376 transitions. [2021-05-21 20:44:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:40,394 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:40,394 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:40,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable432 [2021-05-21 20:44:40,394 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:40,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:40,394 INFO L82 PathProgramCache]: Analyzing trace with hash -700417548, now seen corresponding path program 80 times [2021-05-21 20:44:40,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:40,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251306449] [2021-05-21 20:44:40,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:40,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:40,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251306449] [2021-05-21 20:44:40,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251306449] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:40,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:40,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:40,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220731994] [2021-05-21 20:44:40,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:40,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:40,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:40,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:40,423 INFO L87 Difference]: Start difference. First operand 129 states and 376 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:40,482 INFO L93 Difference]: Finished difference Result 186 states and 490 transitions. [2021-05-21 20:44:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:40,483 INFO L225 Difference]: With dead ends: 186 [2021-05-21 20:44:40,483 INFO L226 Difference]: Without dead ends: 183 [2021-05-21 20:44:40,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-21 20:44:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-05-21 20:44:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8962962962962964) internal successors, (391), 135 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 391 transitions. [2021-05-21 20:44:40,484 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 391 transitions. Word has length 16 [2021-05-21 20:44:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:40,484 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 391 transitions. [2021-05-21 20:44:40,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 391 transitions. [2021-05-21 20:44:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:40,485 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:40,485 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:40,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable433 [2021-05-21 20:44:40,485 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1797745124, now seen corresponding path program 81 times [2021-05-21 20:44:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:40,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236051208] [2021-05-21 20:44:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:40,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:40,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236051208] [2021-05-21 20:44:40,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236051208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:40,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:40,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:40,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328983391] [2021-05-21 20:44:40,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:40,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:40,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:40,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:40,512 INFO L87 Difference]: Start difference. First operand 136 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:40,584 INFO L93 Difference]: Finished difference Result 185 states and 488 transitions. [2021-05-21 20:44:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:40,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:40,585 INFO L225 Difference]: With dead ends: 185 [2021-05-21 20:44:40,585 INFO L226 Difference]: Without dead ends: 182 [2021-05-21 20:44:40,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-21 20:44:40,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2021-05-21 20:44:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8955223880597014) internal successors, (388), 134 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 388 transitions. [2021-05-21 20:44:40,586 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 388 transitions. Word has length 16 [2021-05-21 20:44:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:40,586 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 388 transitions. [2021-05-21 20:44:40,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,586 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 388 transitions. [2021-05-21 20:44:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:40,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:40,587 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:40,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434 [2021-05-21 20:44:40,587 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash 351051412, now seen corresponding path program 82 times [2021-05-21 20:44:40,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:40,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512408919] [2021-05-21 20:44:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:40,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:40,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512408919] [2021-05-21 20:44:40,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512408919] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:40,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:40,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:40,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48686797] [2021-05-21 20:44:40,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:40,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:40,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:40,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:40,610 INFO L87 Difference]: Start difference. First operand 135 states and 388 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:40,666 INFO L93 Difference]: Finished difference Result 172 states and 468 transitions. [2021-05-21 20:44:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:40,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:40,666 INFO L225 Difference]: With dead ends: 172 [2021-05-21 20:44:40,666 INFO L226 Difference]: Without dead ends: 167 [2021-05-21 20:44:40,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-21 20:44:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2021-05-21 20:44:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9296875) internal successors, (375), 128 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 375 transitions. [2021-05-21 20:44:40,668 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 375 transitions. Word has length 16 [2021-05-21 20:44:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:40,668 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 375 transitions. [2021-05-21 20:44:40,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 375 transitions. [2021-05-21 20:44:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:40,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:40,668 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:40,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435 [2021-05-21 20:44:40,669 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:40,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1836118152, now seen corresponding path program 80 times [2021-05-21 20:44:40,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:40,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472813680] [2021-05-21 20:44:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:40,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:40,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472813680] [2021-05-21 20:44:40,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472813680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:40,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475537177] [2021-05-21 20:44:40,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:40,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:40,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:40,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:40,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:40,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475537177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:40,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:40,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:44:40,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260290471] [2021-05-21 20:44:40,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:40,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:40,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:40,780 INFO L87 Difference]: Start difference. First operand 129 states and 375 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:40,863 INFO L93 Difference]: Finished difference Result 197 states and 540 transitions. [2021-05-21 20:44:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:40,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:40,864 INFO L225 Difference]: With dead ends: 197 [2021-05-21 20:44:40,864 INFO L226 Difference]: Without dead ends: 197 [2021-05-21 20:44:40,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-21 20:44:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 133. [2021-05-21 20:44:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.962121212121212) internal successors, (391), 132 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 391 transitions. [2021-05-21 20:44:40,865 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 391 transitions. Word has length 16 [2021-05-21 20:44:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:40,865 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 391 transitions. [2021-05-21 20:44:40,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 391 transitions. [2021-05-21 20:44:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:40,866 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:40,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:41,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:41,069 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1097293038, now seen corresponding path program 81 times [2021-05-21 20:44:41,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:41,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84407497] [2021-05-21 20:44:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:41,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:41,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84407497] [2021-05-21 20:44:41,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84407497] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:41,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:41,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:41,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565710564] [2021-05-21 20:44:41,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:41,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:41,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:41,096 INFO L87 Difference]: Start difference. First operand 133 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:41,191 INFO L93 Difference]: Finished difference Result 193 states and 523 transitions. [2021-05-21 20:44:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:41,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:41,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:41,191 INFO L225 Difference]: With dead ends: 193 [2021-05-21 20:44:41,191 INFO L226 Difference]: Without dead ends: 191 [2021-05-21 20:44:41,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-21 20:44:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 131. [2021-05-21 20:44:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.9461538461538463) internal successors, (383), 130 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 383 transitions. [2021-05-21 20:44:41,193 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 383 transitions. Word has length 16 [2021-05-21 20:44:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:41,193 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 383 transitions. [2021-05-21 20:44:41,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 383 transitions. [2021-05-21 20:44:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:41,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:41,194 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:41,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437 [2021-05-21 20:44:41,194 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:41,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1632522840, now seen corresponding path program 82 times [2021-05-21 20:44:41,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:41,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202276146] [2021-05-21 20:44:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:41,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:41,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202276146] [2021-05-21 20:44:41,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202276146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:41,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:41,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:41,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111220594] [2021-05-21 20:44:41,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:41,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:41,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:41,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:41,218 INFO L87 Difference]: Start difference. First operand 131 states and 383 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:41,305 INFO L93 Difference]: Finished difference Result 170 states and 473 transitions. [2021-05-21 20:44:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:41,306 INFO L225 Difference]: With dead ends: 170 [2021-05-21 20:44:41,306 INFO L226 Difference]: Without dead ends: 166 [2021-05-21 20:44:41,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-21 20:44:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 128. [2021-05-21 20:44:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.9291338582677167) internal successors, (372), 127 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 372 transitions. [2021-05-21 20:44:41,307 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 372 transitions. Word has length 16 [2021-05-21 20:44:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:41,308 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 372 transitions. [2021-05-21 20:44:41,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 372 transitions. [2021-05-21 20:44:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:41,308 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:41,308 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:41,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438 [2021-05-21 20:44:41,308 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1788497036, now seen corresponding path program 83 times [2021-05-21 20:44:41,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:41,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303089461] [2021-05-21 20:44:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:41,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:41,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303089461] [2021-05-21 20:44:41,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303089461] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:41,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:41,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:41,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401776352] [2021-05-21 20:44:41,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:41,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:41,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:41,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:41,332 INFO L87 Difference]: Start difference. First operand 128 states and 372 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:41,392 INFO L93 Difference]: Finished difference Result 154 states and 417 transitions. [2021-05-21 20:44:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:41,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:41,393 INFO L225 Difference]: With dead ends: 154 [2021-05-21 20:44:41,393 INFO L226 Difference]: Without dead ends: 148 [2021-05-21 20:44:41,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-21 20:44:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 129. [2021-05-21 20:44:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9140625) internal successors, (373), 128 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 373 transitions. [2021-05-21 20:44:41,395 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 373 transitions. Word has length 16 [2021-05-21 20:44:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:41,395 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 373 transitions. [2021-05-21 20:44:41,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 373 transitions. [2021-05-21 20:44:41,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:41,395 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:41,395 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:41,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439 [2021-05-21 20:44:41,395 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1079869562, now seen corresponding path program 84 times [2021-05-21 20:44:41,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:41,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143589070] [2021-05-21 20:44:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:41,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:41,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143589070] [2021-05-21 20:44:41,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143589070] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:41,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:41,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573764888] [2021-05-21 20:44:41,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:41,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:41,424 INFO L87 Difference]: Start difference. First operand 129 states and 373 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:41,501 INFO L93 Difference]: Finished difference Result 164 states and 429 transitions. [2021-05-21 20:44:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:41,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:41,501 INFO L225 Difference]: With dead ends: 164 [2021-05-21 20:44:41,501 INFO L226 Difference]: Without dead ends: 161 [2021-05-21 20:44:41,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-21 20:44:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2021-05-21 20:44:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.8796992481203008) internal successors, (383), 133 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 383 transitions. [2021-05-21 20:44:41,503 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 383 transitions. Word has length 16 [2021-05-21 20:44:41,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:41,503 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 383 transitions. [2021-05-21 20:44:41,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 383 transitions. [2021-05-21 20:44:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:41,503 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:41,503 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:41,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440 [2021-05-21 20:44:41,503 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:41,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2117770158, now seen corresponding path program 85 times [2021-05-21 20:44:41,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:41,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500032514] [2021-05-21 20:44:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:41,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:41,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500032514] [2021-05-21 20:44:41,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500032514] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:41,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:41,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:41,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999866455] [2021-05-21 20:44:41,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:41,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:41,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:41,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:41,529 INFO L87 Difference]: Start difference. First operand 134 states and 383 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:41,603 INFO L93 Difference]: Finished difference Result 151 states and 410 transitions. [2021-05-21 20:44:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:41,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:41,604 INFO L225 Difference]: With dead ends: 151 [2021-05-21 20:44:41,604 INFO L226 Difference]: Without dead ends: 147 [2021-05-21 20:44:41,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:41,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-21 20:44:41,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 128. [2021-05-21 20:44:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.921259842519685) internal successors, (371), 127 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 371 transitions. [2021-05-21 20:44:41,606 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 371 transitions. Word has length 16 [2021-05-21 20:44:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:41,606 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 371 transitions. [2021-05-21 20:44:41,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 371 transitions. [2021-05-21 20:44:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:41,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:41,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:41,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441 [2021-05-21 20:44:41,606 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:41,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:41,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1586215828, now seen corresponding path program 86 times [2021-05-21 20:44:41,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:41,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538954676] [2021-05-21 20:44:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:41,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:41,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538954676] [2021-05-21 20:44:41,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538954676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:41,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:41,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:41,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379259226] [2021-05-21 20:44:41,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:41,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:41,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:41,632 INFO L87 Difference]: Start difference. First operand 128 states and 371 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:41,703 INFO L93 Difference]: Finished difference Result 147 states and 399 transitions. [2021-05-21 20:44:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:41,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:41,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:41,703 INFO L225 Difference]: With dead ends: 147 [2021-05-21 20:44:41,703 INFO L226 Difference]: Without dead ends: 144 [2021-05-21 20:44:41,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-21 20:44:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2021-05-21 20:44:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8805970149253732) internal successors, (386), 134 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 386 transitions. [2021-05-21 20:44:41,705 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 386 transitions. Word has length 16 [2021-05-21 20:44:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:41,705 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 386 transitions. [2021-05-21 20:44:41,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 386 transitions. [2021-05-21 20:44:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:41,705 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:41,705 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:41,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442 [2021-05-21 20:44:41,705 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1611423892, now seen corresponding path program 87 times [2021-05-21 20:44:41,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:41,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221498954] [2021-05-21 20:44:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:41,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:41,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221498954] [2021-05-21 20:44:41,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221498954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:41,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:41,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:41,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915170008] [2021-05-21 20:44:41,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:41,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:41,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:41,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:41,734 INFO L87 Difference]: Start difference. First operand 135 states and 386 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:41,809 INFO L93 Difference]: Finished difference Result 146 states and 397 transitions. [2021-05-21 20:44:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:41,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:41,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:41,809 INFO L225 Difference]: With dead ends: 146 [2021-05-21 20:44:41,810 INFO L226 Difference]: Without dead ends: 143 [2021-05-21 20:44:41,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-21 20:44:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 134. [2021-05-21 20:44:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.8796992481203008) internal successors, (383), 133 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 383 transitions. [2021-05-21 20:44:41,811 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 383 transitions. Word has length 16 [2021-05-21 20:44:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:41,811 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 383 transitions. [2021-05-21 20:44:41,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,811 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 383 transitions. [2021-05-21 20:44:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:41,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:41,812 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:41,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443 [2021-05-21 20:44:41,812 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:41,812 INFO L82 PathProgramCache]: Analyzing trace with hash -534746868, now seen corresponding path program 88 times [2021-05-21 20:44:41,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:41,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839471406] [2021-05-21 20:44:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:41,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:41,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839471406] [2021-05-21 20:44:41,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839471406] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:41,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:41,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:41,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547377377] [2021-05-21 20:44:41,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:41,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:41,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:41,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:41,834 INFO L87 Difference]: Start difference. First operand 134 states and 383 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:41,884 INFO L93 Difference]: Finished difference Result 133 states and 377 transitions. [2021-05-21 20:44:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:41,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:41,884 INFO L225 Difference]: With dead ends: 133 [2021-05-21 20:44:41,884 INFO L226 Difference]: Without dead ends: 127 [2021-05-21 20:44:41,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-21 20:44:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-21 20:44:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.9285714285714284) internal successors, (369), 126 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 369 transitions. [2021-05-21 20:44:41,886 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 369 transitions. Word has length 16 [2021-05-21 20:44:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:41,886 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 369 transitions. [2021-05-21 20:44:41,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 369 transitions. [2021-05-21 20:44:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:41,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:41,886 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:41,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable444 [2021-05-21 20:44:41,886 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:41,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1956099518, now seen corresponding path program 83 times [2021-05-21 20:44:41,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:41,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355197774] [2021-05-21 20:44:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:41,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:41,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355197774] [2021-05-21 20:44:41,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355197774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:41,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042225458] [2021-05-21 20:44:41,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:41,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:44:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:41,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042225458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:41,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:41,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:44:41,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754027922] [2021-05-21 20:44:41,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:44:41,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:41,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:44:41,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:44:41,967 INFO L87 Difference]: Start difference. First operand 127 states and 369 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:42,041 INFO L93 Difference]: Finished difference Result 176 states and 508 transitions. [2021-05-21 20:44:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:42,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:42,042 INFO L225 Difference]: With dead ends: 176 [2021-05-21 20:44:42,042 INFO L226 Difference]: Without dead ends: 176 [2021-05-21 20:44:42,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:44:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-21 20:44:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 121. [2021-05-21 20:44:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.925) internal successors, (351), 120 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 351 transitions. [2021-05-21 20:44:42,043 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 351 transitions. Word has length 16 [2021-05-21 20:44:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:42,043 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 351 transitions. [2021-05-21 20:44:42,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 351 transitions. [2021-05-21 20:44:42,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:42,044 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:42,044 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:42,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-05-21 20:44:42,244 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash -912267080, now seen corresponding path program 84 times [2021-05-21 20:44:42,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:42,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102474418] [2021-05-21 20:44:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:42,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:42,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102474418] [2021-05-21 20:44:42,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102474418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:42,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543774475] [2021-05-21 20:44:42,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:42,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:44:42,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:42,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:42,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:42,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543774475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:42,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:42,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:42,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376215071] [2021-05-21 20:44:42,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:42,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:42,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:42,347 INFO L87 Difference]: Start difference. First operand 121 states and 351 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:42,441 INFO L93 Difference]: Finished difference Result 193 states and 540 transitions. [2021-05-21 20:44:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:42,441 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:42,441 INFO L225 Difference]: With dead ends: 193 [2021-05-21 20:44:42,441 INFO L226 Difference]: Without dead ends: 193 [2021-05-21 20:44:42,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-21 20:44:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 123. [2021-05-21 20:44:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.942622950819672) internal successors, (359), 122 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 359 transitions. [2021-05-21 20:44:42,443 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 359 transitions. Word has length 16 [2021-05-21 20:44:42,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:42,443 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 359 transitions. [2021-05-21 20:44:42,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 359 transitions. [2021-05-21 20:44:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:42,444 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:42,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:42,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:42,644 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 449289026, now seen corresponding path program 85 times [2021-05-21 20:44:42,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:42,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054437885] [2021-05-21 20:44:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:42,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:42,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054437885] [2021-05-21 20:44:42,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054437885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:42,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:42,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:42,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399712513] [2021-05-21 20:44:42,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:42,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:42,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:42,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:42,667 INFO L87 Difference]: Start difference. First operand 123 states and 359 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:42,742 INFO L93 Difference]: Finished difference Result 170 states and 487 transitions. [2021-05-21 20:44:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:42,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:42,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:42,743 INFO L225 Difference]: With dead ends: 170 [2021-05-21 20:44:42,743 INFO L226 Difference]: Without dead ends: 168 [2021-05-21 20:44:42,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-21 20:44:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2021-05-21 20:44:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.9237288135593222) internal successors, (345), 118 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 345 transitions. [2021-05-21 20:44:42,745 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 345 transitions. Word has length 16 [2021-05-21 20:44:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:42,745 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 345 transitions. [2021-05-21 20:44:42,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 345 transitions. [2021-05-21 20:44:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:42,745 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:42,745 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:42,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447 [2021-05-21 20:44:42,745 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1418613346, now seen corresponding path program 86 times [2021-05-21 20:44:42,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:42,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588620799] [2021-05-21 20:44:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:42,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:42,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588620799] [2021-05-21 20:44:42,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588620799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:42,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414046964] [2021-05-21 20:44:42,774 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:42,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:42,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:42,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:42,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:42,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414046964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:42,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:42,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:42,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124578079] [2021-05-21 20:44:42,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:42,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:42,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:42,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:42,850 INFO L87 Difference]: Start difference. First operand 119 states and 345 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:42,957 INFO L93 Difference]: Finished difference Result 151 states and 417 transitions. [2021-05-21 20:44:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:42,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:42,958 INFO L225 Difference]: With dead ends: 151 [2021-05-21 20:44:42,958 INFO L226 Difference]: Without dead ends: 151 [2021-05-21 20:44:42,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-21 20:44:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 118. [2021-05-21 20:44:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.871794871794872) internal successors, (336), 117 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 336 transitions. [2021-05-21 20:44:42,959 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 336 transitions. Word has length 16 [2021-05-21 20:44:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:42,959 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 336 transitions. [2021-05-21 20:44:42,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 336 transitions. [2021-05-21 20:44:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:42,960 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:42,960 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:43,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-05-21 20:44:43,160 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:43,160 INFO L82 PathProgramCache]: Analyzing trace with hash -57057240, now seen corresponding path program 87 times [2021-05-21 20:44:43,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:43,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122063336] [2021-05-21 20:44:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:43,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:43,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122063336] [2021-05-21 20:44:43,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122063336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:43,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:43,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:43,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558514410] [2021-05-21 20:44:43,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:43,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:43,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:43,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:43,185 INFO L87 Difference]: Start difference. First operand 118 states and 336 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:43,274 INFO L93 Difference]: Finished difference Result 147 states and 400 transitions. [2021-05-21 20:44:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:43,275 INFO L225 Difference]: With dead ends: 147 [2021-05-21 20:44:43,275 INFO L226 Difference]: Without dead ends: 145 [2021-05-21 20:44:43,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-21 20:44:43,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 116. [2021-05-21 20:44:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.8521739130434782) internal successors, (328), 115 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 328 transitions. [2021-05-21 20:44:43,276 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 328 transitions. Word has length 16 [2021-05-21 20:44:43,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:43,276 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 328 transitions. [2021-05-21 20:44:43,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:43,276 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 328 transitions. [2021-05-21 20:44:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:44:43,276 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:43,277 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:43,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449 [2021-05-21 20:44:43,277 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:43,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:43,277 INFO L82 PathProgramCache]: Analyzing trace with hash -592287042, now seen corresponding path program 88 times [2021-05-21 20:44:43,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:43,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310090870] [2021-05-21 20:44:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:43,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:43,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310090870] [2021-05-21 20:44:43,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310090870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:43,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:43,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:44:43,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210651913] [2021-05-21 20:44:43,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:44:43,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:43,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:44:43,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:43,298 INFO L87 Difference]: Start difference. First operand 116 states and 328 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:43,379 INFO L93 Difference]: Finished difference Result 124 states and 350 transitions. [2021-05-21 20:44:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:43,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:44:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:43,380 INFO L225 Difference]: With dead ends: 124 [2021-05-21 20:44:43,380 INFO L226 Difference]: Without dead ends: 120 [2021-05-21 20:44:43,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-21 20:44:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-05-21 20:44:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-05-21 20:44:43,382 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-05-21 20:44:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:43,382 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-05-21 20:44:43,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-05-21 20:44:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:44:43,382 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:43,382 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:43,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450 [2021-05-21 20:44:43,382 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:43,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1638627788, now seen corresponding path program 1 times [2021-05-21 20:44:43,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:43,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145275340] [2021-05-21 20:44:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:43,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:43,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145275340] [2021-05-21 20:44:43,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145275340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:43,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166027623] [2021-05-21 20:44:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:44:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:44:43,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:43,829 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-21 20:44:44,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:44,041 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-21 20:44:44,043 INFO L168 Benchmark]: Toolchain (without parser) took 78748.07 ms. Allocated memory was 352.3 MB in the beginning and 423.6 MB in the end (delta: 71.3 MB). Free memory was 331.4 MB in the beginning and 198.8 MB in the end (delta: 132.6 MB). Peak memory consumption was 204.0 MB. Max. memory is 16.0 GB. [2021-05-21 20:44:44,043 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 352.3 MB. Free memory is still 332.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:44:44,043 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.14 ms. Allocated memory is still 352.3 MB. Free memory was 331.3 MB in the beginning and 329.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:44:44,043 INFO L168 Benchmark]: Boogie Preprocessor took 11.33 ms. Allocated memory is still 352.3 MB. Free memory was 329.8 MB in the beginning and 328.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:44:44,043 INFO L168 Benchmark]: RCFGBuilder took 320.70 ms. Allocated memory is still 352.3 MB. Free memory was 328.7 MB in the beginning and 333.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.0 GB. [2021-05-21 20:44:44,043 INFO L168 Benchmark]: TraceAbstraction took 78395.74 ms. Allocated memory was 352.3 MB in the beginning and 423.6 MB in the end (delta: 71.3 MB). Free memory was 332.0 MB in the beginning and 198.8 MB in the end (delta: 133.2 MB). Peak memory consumption was 203.4 MB. Max. memory is 16.0 GB. [2021-05-21 20:44:44,044 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 352.3 MB. Free memory is still 332.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.14 ms. Allocated memory is still 352.3 MB. Free memory was 331.3 MB in the beginning and 329.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.33 ms. Allocated memory is still 352.3 MB. Free memory was 329.8 MB in the beginning and 328.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 320.70 ms. Allocated memory is still 352.3 MB. Free memory was 328.7 MB in the beginning and 333.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 78395.74 ms. Allocated memory was 352.3 MB in the beginning and 423.6 MB in the end (delta: 71.3 MB). Free memory was 332.0 MB in the beginning and 198.8 MB in the end (delta: 133.2 MB). Peak memory consumption was 203.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...