/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:53:46,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:53:46,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:53:46,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:53:46,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:53:46,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:53:46,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:53:46,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:53:46,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:53:46,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:53:46,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:53:46,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:53:46,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:53:46,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:53:46,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:53:46,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:53:46,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:53:46,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:53:46,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:53:46,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:53:46,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:53:46,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:53:46,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:53:46,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:53:46,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:53:46,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:53:46,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:53:46,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:53:46,626 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:53:46,669 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:53:46,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:53:46,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:53:46,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:53:46,672 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:53:46,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:53:46,673 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:53:46,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:53:46,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:53:46,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:53:46,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:53:46,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:53:46,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:53:46,674 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:53:46,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:53:46,674 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:53:46,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:53:46,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:53:46,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:53:46,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:53:46,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:53:46,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:53:46,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:53:46,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:53:46,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:53:46,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:53:46,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:53:46,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:53:46,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:53:46,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:53:47,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:53:47,025 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:53:47,029 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:53:47,031 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:53:47,031 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:53:47,032 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-18 17:53:47,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4069a2980/6edb6c349397404baaf37b905dd74028/FLAG25ea382bd [2020-08-18 17:53:47,519 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:53:47,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-18 17:53:47,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4069a2980/6edb6c349397404baaf37b905dd74028/FLAG25ea382bd [2020-08-18 17:53:47,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4069a2980/6edb6c349397404baaf37b905dd74028 [2020-08-18 17:53:47,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:53:47,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:53:47,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:53:47,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:53:47,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:53:47,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:53:47" (1/1) ... [2020-08-18 17:53:47,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11967da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:47, skipping insertion in model container [2020-08-18 17:53:47,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:53:47" (1/1) ... [2020-08-18 17:53:47,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:53:47,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:53:48,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:53:48,107 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:53:48,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:53:48,147 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:53:48,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:48 WrapperNode [2020-08-18 17:53:48,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:53:48,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:53:48,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:53:48,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:53:48,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:48" (1/1) ... [2020-08-18 17:53:48,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:48" (1/1) ... [2020-08-18 17:53:48,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:48" (1/1) ... [2020-08-18 17:53:48,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:48" (1/1) ... [2020-08-18 17:53:48,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:48" (1/1) ... [2020-08-18 17:53:48,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:48" (1/1) ... [2020-08-18 17:53:48,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:48" (1/1) ... [2020-08-18 17:53:48,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:53:48,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:53:48,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:53:48,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:53:48,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 17:53:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:53:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:53:48,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:53:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:53:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:53:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:53:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:53:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:53:48,623 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:53:48,623 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:53:48,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:48 BoogieIcfgContainer [2020-08-18 17:53:48,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:53:48,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:53:48,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:53:48,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:53:48,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:53:47" (1/3) ... [2020-08-18 17:53:48,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b24c1a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:48, skipping insertion in model container [2020-08-18 17:53:48,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:48" (2/3) ... [2020-08-18 17:53:48,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b24c1a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:48, skipping insertion in model container [2020-08-18 17:53:48,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:48" (3/3) ... [2020-08-18 17:53:48,637 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-18 17:53:48,654 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:53:48,663 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:53:48,691 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:53:48,742 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:53:48,742 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:53:48,742 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:53:48,743 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:53:48,743 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:53:48,743 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:53:48,743 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:53:48,743 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:53:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-18 17:53:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:53:48,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:48,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:48,772 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:48,779 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-18 17:53:48,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:48,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795590986] [2020-08-18 17:53:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:48,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:48,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795590986] [2020-08-18 17:53:48,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:48,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:48,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816715479] [2020-08-18 17:53:49,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,015 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-18 17:53:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,094 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-18 17:53:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 17:53:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,109 INFO L225 Difference]: With dead ends: 75 [2020-08-18 17:53:49,110 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 17:53:49,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 17:53:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-18 17:53:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:53:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-18 17:53:49,162 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-18 17:53:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,163 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-18 17:53:49,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-18 17:53:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:53:49,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:53:49,166 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-18 17:53:49,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539103836] [2020-08-18 17:53:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:49,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539103836] [2020-08-18 17:53:49,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790245220] [2020-08-18 17:53:49,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,235 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-18 17:53:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,274 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-18 17:53:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 17:53:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,277 INFO L225 Difference]: With dead ends: 97 [2020-08-18 17:53:49,277 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 17:53:49,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 17:53:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-18 17:53:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 17:53:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-18 17:53:49,291 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-18 17:53:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,292 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-18 17:53:49,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-18 17:53:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:53:49,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:53:49,294 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,295 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-18 17:53:49,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579392690] [2020-08-18 17:53:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:49,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579392690] [2020-08-18 17:53:49,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101432180] [2020-08-18 17:53:49,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,379 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-18 17:53:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,412 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-18 17:53:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 17:53:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,415 INFO L225 Difference]: With dead ends: 90 [2020-08-18 17:53:49,415 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 17:53:49,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 17:53:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-18 17:53:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 17:53:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-18 17:53:49,428 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-18 17:53:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,429 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-18 17:53:49,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-18 17:53:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:53:49,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:53:49,431 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-18 17:53:49,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698167723] [2020-08-18 17:53:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:49,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698167723] [2020-08-18 17:53:49,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932509272] [2020-08-18 17:53:49,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,480 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-18 17:53:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,500 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-18 17:53:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 17:53:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,503 INFO L225 Difference]: With dead ends: 112 [2020-08-18 17:53:49,503 INFO L226 Difference]: Without dead ends: 110 [2020-08-18 17:53:49,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-18 17:53:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-18 17:53:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-18 17:53:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-18 17:53:49,521 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-18 17:53:49,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,521 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-18 17:53:49,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-18 17:53:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:53:49,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:53:49,529 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-18 17:53:49,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743732071] [2020-08-18 17:53:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:49,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743732071] [2020-08-18 17:53:49,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719630306] [2020-08-18 17:53:49,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,571 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-18 17:53:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,592 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-18 17:53:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 17:53:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,595 INFO L225 Difference]: With dead ends: 184 [2020-08-18 17:53:49,595 INFO L226 Difference]: Without dead ends: 112 [2020-08-18 17:53:49,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-18 17:53:49,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-18 17:53:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-18 17:53:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-18 17:53:49,609 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-18 17:53:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,610 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-18 17:53:49,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-18 17:53:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:53:49,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:53:49,613 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-18 17:53:49,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677646969] [2020-08-18 17:53:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:49,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677646969] [2020-08-18 17:53:49,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148173284] [2020-08-18 17:53:49,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,677 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-18 17:53:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,712 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-18 17:53:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 17:53:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,715 INFO L225 Difference]: With dead ends: 165 [2020-08-18 17:53:49,715 INFO L226 Difference]: Without dead ends: 114 [2020-08-18 17:53:49,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-18 17:53:49,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-18 17:53:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-18 17:53:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-18 17:53:49,732 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-18 17:53:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,733 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-18 17:53:49,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,733 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-18 17:53:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:53:49,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:53:49,735 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,736 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-18 17:53:49,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076782518] [2020-08-18 17:53:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:49,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076782518] [2020-08-18 17:53:49,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236946113] [2020-08-18 17:53:49,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,773 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-18 17:53:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,792 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-18 17:53:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 17:53:49,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,795 INFO L225 Difference]: With dead ends: 204 [2020-08-18 17:53:49,795 INFO L226 Difference]: Without dead ends: 202 [2020-08-18 17:53:49,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-18 17:53:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-18 17:53:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-18 17:53:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-18 17:53:49,811 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-18 17:53:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,812 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-18 17:53:49,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-18 17:53:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:53:49,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:53:49,815 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-18 17:53:49,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674510886] [2020-08-18 17:53:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:49,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674510886] [2020-08-18 17:53:49,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073898690] [2020-08-18 17:53:49,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,862 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-18 17:53:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,883 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-18 17:53:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 17:53:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,886 INFO L225 Difference]: With dead ends: 352 [2020-08-18 17:53:49,886 INFO L226 Difference]: Without dead ends: 210 [2020-08-18 17:53:49,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-18 17:53:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-18 17:53:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-18 17:53:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-18 17:53:49,913 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-18 17:53:49,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,917 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-18 17:53:49,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-18 17:53:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:53:49,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:53:49,922 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,922 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-18 17:53:49,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849610392] [2020-08-18 17:53:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:49,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849610392] [2020-08-18 17:53:49,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748853831] [2020-08-18 17:53:49,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,966 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-18 17:53:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,984 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-18 17:53:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:53:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,987 INFO L225 Difference]: With dead ends: 312 [2020-08-18 17:53:49,987 INFO L226 Difference]: Without dead ends: 214 [2020-08-18 17:53:49,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-18 17:53:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-18 17:53:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-18 17:53:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-18 17:53:50,001 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-18 17:53:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,002 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-18 17:53:50,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-18 17:53:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:53:50,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:53:50,004 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,004 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-18 17:53:50,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40094025] [2020-08-18 17:53:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:50,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40094025] [2020-08-18 17:53:50,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520314953] [2020-08-18 17:53:50,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,042 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-18 17:53:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,066 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-18 17:53:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:53:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,069 INFO L225 Difference]: With dead ends: 380 [2020-08-18 17:53:50,069 INFO L226 Difference]: Without dead ends: 378 [2020-08-18 17:53:50,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-18 17:53:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-18 17:53:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-18 17:53:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-18 17:53:50,083 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-18 17:53:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,084 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-18 17:53:50,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-18 17:53:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:53:50,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:53:50,086 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-18 17:53:50,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420072640] [2020-08-18 17:53:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:50,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420072640] [2020-08-18 17:53:50,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136566450] [2020-08-18 17:53:50,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,118 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-18 17:53:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,143 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-18 17:53:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:53:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,146 INFO L225 Difference]: With dead ends: 684 [2020-08-18 17:53:50,146 INFO L226 Difference]: Without dead ends: 402 [2020-08-18 17:53:50,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-18 17:53:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-18 17:53:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-18 17:53:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-18 17:53:50,165 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-18 17:53:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,166 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-18 17:53:50,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,166 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-18 17:53:50,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:53:50,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:53:50,168 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-18 17:53:50,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646118058] [2020-08-18 17:53:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:50,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646118058] [2020-08-18 17:53:50,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772257791] [2020-08-18 17:53:50,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,208 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-18 17:53:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,239 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-18 17:53:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 17:53:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,243 INFO L225 Difference]: With dead ends: 600 [2020-08-18 17:53:50,243 INFO L226 Difference]: Without dead ends: 410 [2020-08-18 17:53:50,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-18 17:53:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-18 17:53:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-18 17:53:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-18 17:53:50,264 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-18 17:53:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,264 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-18 17:53:50,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-18 17:53:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:53:50,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:53:50,274 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-18 17:53:50,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212516166] [2020-08-18 17:53:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:50,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212516166] [2020-08-18 17:53:50,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033148326] [2020-08-18 17:53:50,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,316 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-18 17:53:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,348 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-18 17:53:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 17:53:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,352 INFO L225 Difference]: With dead ends: 716 [2020-08-18 17:53:50,353 INFO L226 Difference]: Without dead ends: 714 [2020-08-18 17:53:50,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-18 17:53:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-18 17:53:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-18 17:53:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-18 17:53:50,373 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-18 17:53:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,374 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-18 17:53:50,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-18 17:53:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:53:50,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:53:50,376 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-18 17:53:50,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314053648] [2020-08-18 17:53:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:50,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314053648] [2020-08-18 17:53:50,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591340338] [2020-08-18 17:53:50,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,404 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-18 17:53:50,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,431 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-18 17:53:50,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 17:53:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,436 INFO L225 Difference]: With dead ends: 1340 [2020-08-18 17:53:50,437 INFO L226 Difference]: Without dead ends: 778 [2020-08-18 17:53:50,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-18 17:53:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-18 17:53:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-18 17:53:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-18 17:53:50,464 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-18 17:53:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,465 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-18 17:53:50,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-18 17:53:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:53:50,466 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:53:50,467 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-18 17:53:50,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078952481] [2020-08-18 17:53:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:50,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078952481] [2020-08-18 17:53:50,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139803539] [2020-08-18 17:53:50,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,495 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-18 17:53:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,525 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-18 17:53:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 17:53:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,530 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 17:53:50,530 INFO L226 Difference]: Without dead ends: 794 [2020-08-18 17:53:50,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-18 17:53:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-18 17:53:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-18 17:53:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-18 17:53:50,565 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-18 17:53:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,565 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-18 17:53:50,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-18 17:53:50,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:53:50,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:53:50,568 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-18 17:53:50,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006685527] [2020-08-18 17:53:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:50,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006685527] [2020-08-18 17:53:50,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799914782] [2020-08-18 17:53:50,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,596 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-18 17:53:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,632 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-18 17:53:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 17:53:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,640 INFO L225 Difference]: With dead ends: 1356 [2020-08-18 17:53:50,640 INFO L226 Difference]: Without dead ends: 1354 [2020-08-18 17:53:50,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-18 17:53:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-18 17:53:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-18 17:53:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-18 17:53:50,707 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-18 17:53:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,708 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-18 17:53:50,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-18 17:53:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:53:50,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:53:50,712 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-18 17:53:50,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408621624] [2020-08-18 17:53:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:50,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408621624] [2020-08-18 17:53:50,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923469716] [2020-08-18 17:53:50,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,741 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-18 17:53:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,801 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-18 17:53:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 17:53:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,812 INFO L225 Difference]: With dead ends: 2636 [2020-08-18 17:53:50,813 INFO L226 Difference]: Without dead ends: 1514 [2020-08-18 17:53:50,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-18 17:53:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-18 17:53:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-18 17:53:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-18 17:53:50,889 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-18 17:53:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,889 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-18 17:53:50,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-18 17:53:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:53:50,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:53:50,894 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-18 17:53:50,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263767537] [2020-08-18 17:53:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:50,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263767537] [2020-08-18 17:53:50,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273651327] [2020-08-18 17:53:50,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,925 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-18 17:53:50,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,971 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-18 17:53:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 17:53:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,982 INFO L225 Difference]: With dead ends: 2268 [2020-08-18 17:53:50,982 INFO L226 Difference]: Without dead ends: 1546 [2020-08-18 17:53:50,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-18 17:53:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-18 17:53:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-18 17:53:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-18 17:53:51,052 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-18 17:53:51,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:51,053 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-18 17:53:51,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:51,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-18 17:53:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:53:51,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:51,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:51,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 17:53:51,058 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:51,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-18 17:53:51,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:51,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131222358] [2020-08-18 17:53:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:51,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131222358] [2020-08-18 17:53:51,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:51,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:51,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54303711] [2020-08-18 17:53:51,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:51,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:51,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:51,095 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-18 17:53:51,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:51,159 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-18 17:53:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:51,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 17:53:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:51,174 INFO L225 Difference]: With dead ends: 2572 [2020-08-18 17:53:51,175 INFO L226 Difference]: Without dead ends: 2570 [2020-08-18 17:53:51,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-18 17:53:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-18 17:53:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-18 17:53:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-18 17:53:51,252 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-18 17:53:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:51,253 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-18 17:53:51,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-18 17:53:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:53:51,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:51,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:51,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 17:53:51,257 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-18 17:53:51,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:51,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308610450] [2020-08-18 17:53:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:51,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308610450] [2020-08-18 17:53:51,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:51,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:51,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010689919] [2020-08-18 17:53:51,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:51,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:51,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:51,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:51,288 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-18 17:53:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:51,378 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-18 17:53:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:51,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 17:53:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:51,393 INFO L225 Difference]: With dead ends: 5196 [2020-08-18 17:53:51,393 INFO L226 Difference]: Without dead ends: 2954 [2020-08-18 17:53:51,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-18 17:53:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-18 17:53:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-18 17:53:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-18 17:53:51,489 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-18 17:53:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:51,490 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-18 17:53:51,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-18 17:53:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:53:51,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:51,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:51,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 17:53:51,496 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-18 17:53:51,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:51,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696446181] [2020-08-18 17:53:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:51,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696446181] [2020-08-18 17:53:51,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:51,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:51,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929323056] [2020-08-18 17:53:51,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:51,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:51,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:51,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:51,518 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-18 17:53:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:51,576 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-18 17:53:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:51,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 17:53:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:51,591 INFO L225 Difference]: With dead ends: 4428 [2020-08-18 17:53:51,591 INFO L226 Difference]: Without dead ends: 3018 [2020-08-18 17:53:51,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-18 17:53:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-18 17:53:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-18 17:53:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-18 17:53:51,689 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-18 17:53:51,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:51,689 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-18 17:53:51,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-18 17:53:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:53:51,694 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:51,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:51,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 17:53:51,694 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:51,695 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-18 17:53:51,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:51,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376458833] [2020-08-18 17:53:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:51,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376458833] [2020-08-18 17:53:51,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:51,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:51,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905879281] [2020-08-18 17:53:51,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:51,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:51,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:51,721 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-18 17:53:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:51,835 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-18 17:53:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:51,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 17:53:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:51,890 INFO L225 Difference]: With dead ends: 8650 [2020-08-18 17:53:51,890 INFO L226 Difference]: Without dead ends: 3016 [2020-08-18 17:53:51,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-18 17:53:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-18 17:53:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-18 17:53:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-18 17:53:51,992 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-18 17:53:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:51,993 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-18 17:53:51,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-18 17:53:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:53:51,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:51,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:51,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 17:53:51,999 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-18 17:53:51,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:52,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049759117] [2020-08-18 17:53:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:52,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:52,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049759117] [2020-08-18 17:53:52,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:52,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:52,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413846008] [2020-08-18 17:53:52,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:52,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:52,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:52,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:52,025 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-18 17:53:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:52,069 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-18 17:53:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:52,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 17:53:52,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:52,070 INFO L225 Difference]: With dead ends: 3016 [2020-08-18 17:53:52,070 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:53:52,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:52,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:53:52,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:53:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:53:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:53:52,075 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-18 17:53:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:52,075 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:53:52,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:53:52,076 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:53:52,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 17:53:52,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:53:52,100 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 17:53:52,100 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:53:52,100 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:53:52,100 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:53:52,100 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:53:52,100 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:53:52,100 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-18 17:53:52,101 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-18 17:53:52,101 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,101 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-18 17:53:52,101 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,101 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-18 17:53:52,101 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,101 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,101 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-18 17:53:52,102 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-18 17:53:52,102 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-18 17:53:52,102 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-18 17:53:52,102 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-18 17:53:52,102 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,102 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,102 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,103 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,103 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-18 17:53:52,103 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,103 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-18 17:53:52,103 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-18 17:53:52,103 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,103 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,103 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-18 17:53:52,103 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-18 17:53:52,104 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,104 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-18 17:53:52,104 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,104 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,104 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-18 17:53:52,104 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-18 17:53:52,104 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 17:53:52,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:53:52 BoogieIcfgContainer [2020-08-18 17:53:52,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:53:52,119 INFO L168 Benchmark]: Toolchain (without parser) took 4237.99 ms. Allocated memory was 138.4 MB in the beginning and 303.6 MB in the end (delta: 165.2 MB). Free memory was 101.7 MB in the beginning and 206.9 MB in the end (delta: -105.3 MB). Peak memory consumption was 59.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:52,119 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:53:52,120 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.52 ms. Allocated memory is still 138.4 MB. Free memory was 101.5 MB in the beginning and 90.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:52,120 INFO L168 Benchmark]: Boogie Preprocessor took 114.47 ms. Allocated memory was 138.4 MB in the beginning and 199.2 MB in the end (delta: 60.8 MB). Free memory was 90.6 MB in the beginning and 177.2 MB in the end (delta: -86.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:52,121 INFO L168 Benchmark]: RCFGBuilder took 364.45 ms. Allocated memory is still 199.2 MB. Free memory was 177.2 MB in the beginning and 158.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:52,121 INFO L168 Benchmark]: TraceAbstraction took 3486.76 ms. Allocated memory was 199.2 MB in the beginning and 303.6 MB in the end (delta: 104.3 MB). Free memory was 158.8 MB in the beginning and 206.9 MB in the end (delta: -48.2 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:52,124 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.52 ms. Allocated memory is still 138.4 MB. Free memory was 101.5 MB in the beginning and 90.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.47 ms. Allocated memory was 138.4 MB in the beginning and 199.2 MB in the end (delta: 60.8 MB). Free memory was 90.6 MB in the beginning and 177.2 MB in the end (delta: -86.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 364.45 ms. Allocated memory is still 199.2 MB. Free memory was 177.2 MB in the beginning and 158.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3486.76 ms. Allocated memory was 199.2 MB in the beginning and 303.6 MB in the end (delta: 104.3 MB). Free memory was 158.8 MB in the beginning and 206.9 MB in the end (delta: -48.2 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...