/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:36:35,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:36:35,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:36:35,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 00:36:35,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:36:35,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:36:35,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:36:35,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:36:35,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:36:35,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:36:35,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:36:35,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:36:35,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:36:35,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:36:35,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:36:35,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:36:35,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 00:36:35,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:36:35,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:36:35,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:36:35,764 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 [2020-08-22 00:36:35,802 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:36:35,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:36:35,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:36:35,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:36:35,804 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:36:35,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:36:35,804 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:36:35,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:36:35,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:36:35,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:36:35,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:36:35,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:36:35,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:36:35,807 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:36:35,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:36:35,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:36:35,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:36:35,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:36:35,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:36:35,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:36:35,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:36:35,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:36:35,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:36:35,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:36:35,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:36:35,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:36:35,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:36:35,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:36:35,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:36:35,810 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 00:36:36,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:36:36,110 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:36:36,115 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:36:36,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:36:36,117 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:36:36,117 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-22 00:36:36,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c9c10fce/e89065a86a4d4349b05db699c3b9e81c/FLAG38001fbe3 [2020-08-22 00:36:36,641 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:36:36,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-22 00:36:36,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c9c10fce/e89065a86a4d4349b05db699c3b9e81c/FLAG38001fbe3 [2020-08-22 00:36:37,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c9c10fce/e89065a86a4d4349b05db699c3b9e81c [2020-08-22 00:36:37,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:36:37,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:36:37,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:36:37,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:36:37,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:36:37,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed69f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37, skipping insertion in model container [2020-08-22 00:36:37,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:36:37,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:36:37,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:36:37,283 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:36:37,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:36:37,350 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:36:37,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37 WrapperNode [2020-08-22 00:36:37,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:36:37,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:36:37,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:36:37,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:36:37,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:36:37,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:36:37,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:36:37,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:36:37,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (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 [2020-08-22 00:36:37,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:36:37,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:36:37,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:36:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:36:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 00:36:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:36:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:36:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:36:37,884 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:36:37,884 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 00:36:37,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:36:37 BoogieIcfgContainer [2020-08-22 00:36:37,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:36:37,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:36:37,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:36:37,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:36:37,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:36:37" (1/3) ... [2020-08-22 00:36:37,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4426da78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:36:37, skipping insertion in model container [2020-08-22 00:36:37,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (2/3) ... [2020-08-22 00:36:37,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4426da78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:36:37, skipping insertion in model container [2020-08-22 00:36:37,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:36:37" (3/3) ... [2020-08-22 00:36:37,896 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-22 00:36:37,906 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:36:37,913 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:36:37,927 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:36:37,949 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:36:37,949 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:36:37,949 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:36:37,949 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:36:37,949 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:36:37,949 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:36:37,950 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:36:37,950 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:36:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 00:36:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 00:36:37,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:37,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:37,975 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:37,980 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-22 00:36:37,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:37,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261478022] [2020-08-22 00:36:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261478022] [2020-08-22 00:36:38,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950625563] [2020-08-22 00:36:38,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,195 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-22 00:36:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:38,249 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-22 00:36:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:38,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 00:36:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:38,262 INFO L225 Difference]: With dead ends: 75 [2020-08-22 00:36:38,263 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 00:36:38,267 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 [2020-08-22 00:36:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 00:36:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-22 00:36:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 00:36:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-22 00:36:38,308 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-22 00:36:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:38,309 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-22 00:36:38,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-22 00:36:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 00:36:38,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:38,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:38,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:36:38,311 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:38,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-22 00:36:38,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:38,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089302042] [2020-08-22 00:36:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089302042] [2020-08-22 00:36:38,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345501179] [2020-08-22 00:36:38,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,375 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-22 00:36:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:38,399 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-22 00:36:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:38,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 00:36:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:38,401 INFO L225 Difference]: With dead ends: 97 [2020-08-22 00:36:38,402 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 00:36:38,403 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 [2020-08-22 00:36:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 00:36:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-22 00:36:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 00:36:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-22 00:36:38,413 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-22 00:36:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:38,413 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-22 00:36:38,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-22 00:36:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 00:36:38,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:38,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:38,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:36:38,416 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:38,416 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-22 00:36:38,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:38,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025516292] [2020-08-22 00:36:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025516292] [2020-08-22 00:36:38,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362922725] [2020-08-22 00:36:38,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,484 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-22 00:36:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:38,507 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-22 00:36:38,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:38,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 00:36:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:38,509 INFO L225 Difference]: With dead ends: 90 [2020-08-22 00:36:38,509 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 00:36:38,510 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 [2020-08-22 00:36:38,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 00:36:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-22 00:36:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 00:36:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-22 00:36:38,519 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-22 00:36:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:38,520 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-22 00:36:38,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:38,520 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-22 00:36:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 00:36:38,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:38,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:38,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:36:38,522 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:38,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:38,522 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-22 00:36:38,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:38,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079582084] [2020-08-22 00:36:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079582084] [2020-08-22 00:36:38,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646909626] [2020-08-22 00:36:38,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,564 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-22 00:36:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:38,594 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-22 00:36:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:38,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 00:36:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:38,596 INFO L225 Difference]: With dead ends: 112 [2020-08-22 00:36:38,596 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 00:36:38,597 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 [2020-08-22 00:36:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 00:36:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-22 00:36:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 00:36:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-22 00:36:38,610 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-22 00:36:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:38,610 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-22 00:36:38,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-22 00:36:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 00:36:38,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:38,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:38,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:36:38,612 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:38,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-22 00:36:38,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:38,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939791371] [2020-08-22 00:36:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939791371] [2020-08-22 00:36:38,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294100013] [2020-08-22 00:36:38,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,662 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-22 00:36:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:38,691 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-22 00:36:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:38,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 00:36:38,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:38,694 INFO L225 Difference]: With dead ends: 184 [2020-08-22 00:36:38,694 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 00:36:38,695 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 [2020-08-22 00:36:38,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 00:36:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-22 00:36:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-22 00:36:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-22 00:36:38,709 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-22 00:36:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:38,709 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-22 00:36:38,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-22 00:36:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:36:38,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:38,711 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] [2020-08-22 00:36:38,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:36:38,712 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:38,712 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-22 00:36:38,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:38,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377686060] [2020-08-22 00:36:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377686060] [2020-08-22 00:36:38,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946717416] [2020-08-22 00:36:38,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,755 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-22 00:36:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:38,801 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-22 00:36:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:38,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 00:36:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:38,807 INFO L225 Difference]: With dead ends: 165 [2020-08-22 00:36:38,809 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 00:36:38,810 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 [2020-08-22 00:36:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 00:36:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-22 00:36:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 00:36:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-22 00:36:38,834 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-22 00:36:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:38,834 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-22 00:36:38,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-22 00:36:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:36:38,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:38,840 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] [2020-08-22 00:36:38,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:36:38,841 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:38,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:38,841 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-22 00:36:38,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:38,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744222145] [2020-08-22 00:36:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744222145] [2020-08-22 00:36:38,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378343893] [2020-08-22 00:36:38,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,930 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-22 00:36:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:38,949 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-22 00:36:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:38,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 00:36:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:38,952 INFO L225 Difference]: With dead ends: 204 [2020-08-22 00:36:38,952 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 00:36:38,952 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 [2020-08-22 00:36:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 00:36:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-22 00:36:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-22 00:36:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-22 00:36:38,967 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-22 00:36:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:38,968 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-22 00:36:38,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-22 00:36:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:36:38,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:38,969 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] [2020-08-22 00:36:38,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 00:36:38,970 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:38,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-22 00:36:38,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:38,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351157467] [2020-08-22 00:36:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351157467] [2020-08-22 00:36:38,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101463674] [2020-08-22 00:36:38,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,998 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-22 00:36:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,017 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-22 00:36:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 00:36:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,019 INFO L225 Difference]: With dead ends: 352 [2020-08-22 00:36:39,019 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 00:36:39,020 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 [2020-08-22 00:36:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 00:36:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-22 00:36:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-22 00:36:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-22 00:36:39,036 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-22 00:36:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,036 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-22 00:36:39,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-22 00:36:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 00:36:39,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,038 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] [2020-08-22 00:36:39,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 00:36:39,038 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,039 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-22 00:36:39,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075837549] [2020-08-22 00:36:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075837549] [2020-08-22 00:36:39,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091798550] [2020-08-22 00:36:39,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,086 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-22 00:36:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,103 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-22 00:36:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 00:36:39,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,105 INFO L225 Difference]: With dead ends: 312 [2020-08-22 00:36:39,105 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 00:36:39,106 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 [2020-08-22 00:36:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 00:36:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-22 00:36:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-22 00:36:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-22 00:36:39,119 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-22 00:36:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,119 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-22 00:36:39,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-22 00:36:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 00:36:39,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,121 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] [2020-08-22 00:36:39,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 00:36:39,122 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,122 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-22 00:36:39,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031284687] [2020-08-22 00:36:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031284687] [2020-08-22 00:36:39,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447178919] [2020-08-22 00:36:39,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,149 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-22 00:36:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,172 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-22 00:36:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 00:36:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,175 INFO L225 Difference]: With dead ends: 380 [2020-08-22 00:36:39,175 INFO L226 Difference]: Without dead ends: 378 [2020-08-22 00:36:39,175 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 [2020-08-22 00:36:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-22 00:36:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-22 00:36:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 00:36:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-22 00:36:39,188 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-22 00:36:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,189 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-22 00:36:39,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-22 00:36:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 00:36:39,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,191 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] [2020-08-22 00:36:39,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 00:36:39,191 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,192 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-22 00:36:39,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180621384] [2020-08-22 00:36:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180621384] [2020-08-22 00:36:39,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256101282] [2020-08-22 00:36:39,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,225 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-22 00:36:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,257 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-22 00:36:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 00:36:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,260 INFO L225 Difference]: With dead ends: 684 [2020-08-22 00:36:39,260 INFO L226 Difference]: Without dead ends: 402 [2020-08-22 00:36:39,261 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 [2020-08-22 00:36:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-22 00:36:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-22 00:36:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-22 00:36:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-22 00:36:39,277 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-22 00:36:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,277 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-22 00:36:39,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-22 00:36:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 00:36:39,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,281 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] [2020-08-22 00:36:39,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 00:36:39,281 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-22 00:36:39,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094368402] [2020-08-22 00:36:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094368402] [2020-08-22 00:36:39,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085414964] [2020-08-22 00:36:39,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,308 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-22 00:36:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,329 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-22 00:36:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 00:36:39,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,332 INFO L225 Difference]: With dead ends: 600 [2020-08-22 00:36:39,332 INFO L226 Difference]: Without dead ends: 410 [2020-08-22 00:36:39,333 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 [2020-08-22 00:36:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-22 00:36:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-22 00:36:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-22 00:36:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-22 00:36:39,348 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-22 00:36:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,348 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-22 00:36:39,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-22 00:36:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 00:36:39,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,350 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] [2020-08-22 00:36:39,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 00:36:39,350 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-22 00:36:39,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073623478] [2020-08-22 00:36:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073623478] [2020-08-22 00:36:39,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54571031] [2020-08-22 00:36:39,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,375 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-22 00:36:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,396 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-22 00:36:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,397 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 00:36:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,401 INFO L225 Difference]: With dead ends: 716 [2020-08-22 00:36:39,401 INFO L226 Difference]: Without dead ends: 714 [2020-08-22 00:36:39,402 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 [2020-08-22 00:36:39,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-22 00:36:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-22 00:36:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-22 00:36:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-22 00:36:39,422 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-22 00:36:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,422 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-22 00:36:39,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-22 00:36:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 00:36:39,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,425 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] [2020-08-22 00:36:39,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 00:36:39,426 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-22 00:36:39,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942846438] [2020-08-22 00:36:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942846438] [2020-08-22 00:36:39,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697222991] [2020-08-22 00:36:39,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,451 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-22 00:36:39,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,479 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-22 00:36:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 00:36:39,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,484 INFO L225 Difference]: With dead ends: 1340 [2020-08-22 00:36:39,484 INFO L226 Difference]: Without dead ends: 778 [2020-08-22 00:36:39,486 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 [2020-08-22 00:36:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-22 00:36:39,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-22 00:36:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-22 00:36:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-22 00:36:39,515 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-22 00:36:39,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,515 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-22 00:36:39,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-22 00:36:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 00:36:39,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,517 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] [2020-08-22 00:36:39,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 00:36:39,518 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-22 00:36:39,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520995848] [2020-08-22 00:36:39,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520995848] [2020-08-22 00:36:39,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795615221] [2020-08-22 00:36:39,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,546 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-22 00:36:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,573 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-22 00:36:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 00:36:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,578 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 00:36:39,578 INFO L226 Difference]: Without dead ends: 794 [2020-08-22 00:36:39,579 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 [2020-08-22 00:36:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-22 00:36:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-22 00:36:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-22 00:36:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-22 00:36:39,608 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-22 00:36:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,608 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-22 00:36:39,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-22 00:36:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 00:36:39,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,620 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] [2020-08-22 00:36:39,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 00:36:39,620 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-22 00:36:39,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150693534] [2020-08-22 00:36:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150693534] [2020-08-22 00:36:39,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892399715] [2020-08-22 00:36:39,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,651 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-22 00:36:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,680 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-22 00:36:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 00:36:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,687 INFO L225 Difference]: With dead ends: 1356 [2020-08-22 00:36:39,687 INFO L226 Difference]: Without dead ends: 1354 [2020-08-22 00:36:39,688 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 [2020-08-22 00:36:39,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-22 00:36:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-22 00:36:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-22 00:36:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-22 00:36:39,722 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-22 00:36:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,722 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-22 00:36:39,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-22 00:36:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 00:36:39,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,725 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] [2020-08-22 00:36:39,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 00:36:39,725 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-22 00:36:39,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058570823] [2020-08-22 00:36:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058570823] [2020-08-22 00:36:39,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858049964] [2020-08-22 00:36:39,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,746 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-22 00:36:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,786 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-22 00:36:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 00:36:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,793 INFO L225 Difference]: With dead ends: 2636 [2020-08-22 00:36:39,793 INFO L226 Difference]: Without dead ends: 1514 [2020-08-22 00:36:39,795 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 [2020-08-22 00:36:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-22 00:36:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-22 00:36:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-22 00:36:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-22 00:36:39,840 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-22 00:36:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,840 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-22 00:36:39,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-22 00:36:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 00:36:39,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,843 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] [2020-08-22 00:36:39,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 00:36:39,844 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-22 00:36:39,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38214402] [2020-08-22 00:36:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38214402] [2020-08-22 00:36:39,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370819557] [2020-08-22 00:36:39,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,866 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-22 00:36:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,904 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-22 00:36:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 00:36:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,911 INFO L225 Difference]: With dead ends: 2268 [2020-08-22 00:36:39,911 INFO L226 Difference]: Without dead ends: 1546 [2020-08-22 00:36:39,913 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 [2020-08-22 00:36:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-22 00:36:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-22 00:36:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-22 00:36:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-22 00:36:39,956 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-22 00:36:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,956 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-22 00:36:39,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-22 00:36:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 00:36:39,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,959 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] [2020-08-22 00:36:39,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 00:36:39,960 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-22 00:36:39,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422369998] [2020-08-22 00:36:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422369998] [2020-08-22 00:36:39,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496514095] [2020-08-22 00:36:39,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,981 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-22 00:36:40,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,032 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-22 00:36:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 00:36:40,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,043 INFO L225 Difference]: With dead ends: 2572 [2020-08-22 00:36:40,043 INFO L226 Difference]: Without dead ends: 2570 [2020-08-22 00:36:40,044 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 [2020-08-22 00:36:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-22 00:36:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-22 00:36:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-22 00:36:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-22 00:36:40,137 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-22 00:36:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,138 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-22 00:36:40,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-22 00:36:40,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 00:36:40,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:40,144 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] [2020-08-22 00:36:40,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 00:36:40,145 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:40,145 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-22 00:36:40,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:40,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717699941] [2020-08-22 00:36:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:40,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717699941] [2020-08-22 00:36:40,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:40,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:40,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17203541] [2020-08-22 00:36:40,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:40,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,175 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-22 00:36:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,281 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-22 00:36:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 00:36:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,299 INFO L225 Difference]: With dead ends: 5196 [2020-08-22 00:36:40,299 INFO L226 Difference]: Without dead ends: 2954 [2020-08-22 00:36:40,303 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 [2020-08-22 00:36:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-22 00:36:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-22 00:36:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-22 00:36:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-22 00:36:40,414 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-22 00:36:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,415 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-22 00:36:40,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-22 00:36:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 00:36:40,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:40,420 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] [2020-08-22 00:36:40,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 00:36:40,423 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-22 00:36:40,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:40,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802038869] [2020-08-22 00:36:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:40,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802038869] [2020-08-22 00:36:40,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:40,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:40,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485536029] [2020-08-22 00:36:40,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:40,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:40,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:40,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,455 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-22 00:36:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,513 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-22 00:36:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 00:36:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,525 INFO L225 Difference]: With dead ends: 4428 [2020-08-22 00:36:40,525 INFO L226 Difference]: Without dead ends: 3018 [2020-08-22 00:36:40,528 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 [2020-08-22 00:36:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-22 00:36:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-22 00:36:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-22 00:36:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-22 00:36:40,640 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-22 00:36:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,641 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-22 00:36:40,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-22 00:36:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 00:36:40,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:40,645 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] [2020-08-22 00:36:40,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 00:36:40,646 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:40,646 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-22 00:36:40,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:40,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726847134] [2020-08-22 00:36:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:40,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726847134] [2020-08-22 00:36:40,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:40,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:40,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629250848] [2020-08-22 00:36:40,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:40,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:40,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:40,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,682 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-22 00:36:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,785 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-22 00:36:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 00:36:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,800 INFO L225 Difference]: With dead ends: 8650 [2020-08-22 00:36:40,800 INFO L226 Difference]: Without dead ends: 3016 [2020-08-22 00:36:40,813 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 [2020-08-22 00:36:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-22 00:36:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-22 00:36:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-22 00:36:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-22 00:36:40,904 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-22 00:36:40,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,904 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-22 00:36:40,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-22 00:36:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 00:36:40,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:40,908 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] [2020-08-22 00:36:40,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 00:36:40,911 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:40,911 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-22 00:36:40,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:40,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599627628] [2020-08-22 00:36:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:40,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599627628] [2020-08-22 00:36:40,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:40,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:40,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268731185] [2020-08-22 00:36:40,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:40,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:40,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,938 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-22 00:36:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,985 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-22 00:36:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 00:36:40,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,986 INFO L225 Difference]: With dead ends: 3016 [2020-08-22 00:36:40,987 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 00:36:40,991 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 [2020-08-22 00:36:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 00:36:40,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 00:36:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 00:36:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 00:36:40,992 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-22 00:36:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,993 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 00:36:40,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 00:36:40,993 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 00:36:40,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 00:36:40,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 00:36:41,017 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 00:36:41,017 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:36:41,017 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:36:41,017 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 00:36:41,017 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 00:36:41,018 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 00:36:41,018 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-22 00:36:41,018 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-22 00:36:41,018 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,018 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-22 00:36:41,018 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,018 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-22 00:36:41,018 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,019 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,019 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-22 00:36:41,019 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-22 00:36:41,019 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-22 00:36:41,019 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-22 00:36:41,019 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-22 00:36:41,019 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,019 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,019 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,020 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,020 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-22 00:36:41,020 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,020 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-22 00:36:41,020 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-22 00:36:41,020 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,020 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,020 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-22 00:36:41,020 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-22 00:36:41,020 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,021 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-22 00:36:41,022 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,022 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,022 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-22 00:36:41,022 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-22 00:36:41,022 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 00:36:41,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 12:36:41 BoogieIcfgContainer [2020-08-22 00:36:41,037 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 00:36:41,039 INFO L168 Benchmark]: Toolchain (without parser) took 4006.62 ms. Allocated memory was 149.4 MB in the beginning and 279.4 MB in the end (delta: 130.0 MB). Free memory was 104.0 MB in the beginning and 132.8 MB in the end (delta: -28.8 MB). Peak memory consumption was 101.2 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:41,040 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 149.4 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-22 00:36:41,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.41 ms. Allocated memory is still 149.4 MB. Free memory was 103.8 MB in the beginning and 93.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:41,041 INFO L168 Benchmark]: Boogie Preprocessor took 142.02 ms. Allocated memory was 149.4 MB in the beginning and 205.0 MB in the end (delta: 55.6 MB). Free memory was 93.3 MB in the beginning and 182.6 MB in the end (delta: -89.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:41,042 INFO L168 Benchmark]: RCFGBuilder took 392.58 ms. Allocated memory is still 205.0 MB. Free memory was 182.6 MB in the beginning and 164.8 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:41,045 INFO L168 Benchmark]: TraceAbstraction took 3148.18 ms. Allocated memory was 205.0 MB in the beginning and 279.4 MB in the end (delta: 74.4 MB). Free memory was 164.8 MB in the beginning and 132.8 MB in the end (delta: 32.0 MB). Peak memory consumption was 106.5 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:41,052 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 149.4 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 319.41 ms. Allocated memory is still 149.4 MB. Free memory was 103.8 MB in the beginning and 93.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.02 ms. Allocated memory was 149.4 MB in the beginning and 205.0 MB in the end (delta: 55.6 MB). Free memory was 93.3 MB in the beginning and 182.6 MB in the end (delta: -89.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 392.58 ms. Allocated memory is still 205.0 MB. Free memory was 182.6 MB in the beginning and 164.8 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3148.18 ms. Allocated memory was 205.0 MB in the beginning and 279.4 MB in the end (delta: 74.4 MB). Free memory was 164.8 MB in the beginning and 132.8 MB in the end (delta: 32.0 MB). Peak memory consumption was 106.5 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: 3.0s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.1s, 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: 0.7s 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...