/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:50:54,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:50:54,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:50:55,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:50:55,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:50:55,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:50:55,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:50:55,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:50:55,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:50:55,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:50:55,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:50:55,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:50:55,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:50:55,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:50:55,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:50:55,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:50:55,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:50:55,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:50:55,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:50:55,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:50:55,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:50:55,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:50:55,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:50:55,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:50:55,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-27 21:50:55,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:50:55,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:50:55,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:50:55,065 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 [2020-08-27 21:50:55,125 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:50:55,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:50:55,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:50:55,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:50:55,130 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:50:55,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:50:55,131 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:50:55,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:50:55,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:50:55,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:50:55,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:50:55,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:50:55,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:50:55,133 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:50:55,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:50:55,133 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:50:55,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:50:55,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:50:55,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:50:55,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:50:55,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:50:55,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:55,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:50:55,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:50:55,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:50:55,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:50:55,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:50:55,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:50:55,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:50:55,137 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 -> false [2020-08-27 21:50:55,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:50:55,643 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:50:55,648 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:50:55,650 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:50:55,651 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:50:55,652 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-27 21:50:55,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01fcc1255/6fc90c4dff0e4c578f465dbe12a2666f/FLAG411d66b44 [2020-08-27 21:50:56,325 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:50:56,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-27 21:50:56,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01fcc1255/6fc90c4dff0e4c578f465dbe12a2666f/FLAG411d66b44 [2020-08-27 21:50:56,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01fcc1255/6fc90c4dff0e4c578f465dbe12a2666f [2020-08-27 21:50:56,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:50:56,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:50:56,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:56,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:50:56,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:50:56,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:56,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d198e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56, skipping insertion in model container [2020-08-27 21:50:56,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:56,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:50:56,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:50:56,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:56,968 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:50:57,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:57,023 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:50:57,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57 WrapperNode [2020-08-27 21:50:57,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:57,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:50:57,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:50:57,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:50:57,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:50:57,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:50:57,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:50:57,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:50:57,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (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 [2020-08-27 21:50:57,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:50:57,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:50:57,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:50:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:50:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:50:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:50:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:50:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:50:57,512 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:50:57,512 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-27 21:50:57,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:57 BoogieIcfgContainer [2020-08-27 21:50:57,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:50:57,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:50:57,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:50:57,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:50:57,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:50:56" (1/3) ... [2020-08-27 21:50:57,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693a8342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:57, skipping insertion in model container [2020-08-27 21:50:57,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (2/3) ... [2020-08-27 21:50:57,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693a8342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:57, skipping insertion in model container [2020-08-27 21:50:57,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:57" (3/3) ... [2020-08-27 21:50:57,538 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-27 21:50:57,557 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:50:57,567 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:50:57,594 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:50:57,642 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:50:57,642 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:50:57,642 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:50:57,642 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:50:57,643 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:50:57,643 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:50:57,643 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:50:57,643 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:50:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-27 21:50:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-27 21:50:57,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:57,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:57,701 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:57,708 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-27 21:50:57,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:57,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642156886] [2020-08-27 21:50:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:57,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:57,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642156886] [2020-08-27 21:50:57,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:57,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:57,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994338452] [2020-08-27 21:50:57,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:57,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:57,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:57,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:57,993 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-27 21:50:58,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,058 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-27 21:50:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-27 21:50:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,076 INFO L225 Difference]: With dead ends: 75 [2020-08-27 21:50:58,077 INFO L226 Difference]: Without dead ends: 60 [2020-08-27 21:50:58,081 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 [2020-08-27 21:50:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-27 21:50:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-27 21:50:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-27 21:50:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-27 21:50:58,136 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-27 21:50:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,136 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-27 21:50:58,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-27 21:50:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-27 21:50:58,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:58,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:50:58,142 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-27 21:50:58,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134500862] [2020-08-27 21:50:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134500862] [2020-08-27 21:50:58,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702127066] [2020-08-27 21:50:58,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,243 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-27 21:50:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,276 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-27 21:50:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-27 21:50:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,280 INFO L225 Difference]: With dead ends: 97 [2020-08-27 21:50:58,281 INFO L226 Difference]: Without dead ends: 60 [2020-08-27 21:50:58,283 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 [2020-08-27 21:50:58,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-27 21:50:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-27 21:50:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-27 21:50:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-27 21:50:58,295 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-27 21:50:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,296 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-27 21:50:58,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-27 21:50:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:50:58,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:58,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:50:58,298 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,299 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-27 21:50:58,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393681031] [2020-08-27 21:50:58,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393681031] [2020-08-27 21:50:58,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368471693] [2020-08-27 21:50:58,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,351 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-27 21:50:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,385 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-27 21:50:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-27 21:50:58,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,388 INFO L225 Difference]: With dead ends: 90 [2020-08-27 21:50:58,388 INFO L226 Difference]: Without dead ends: 63 [2020-08-27 21:50:58,389 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 [2020-08-27 21:50:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-27 21:50:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-27 21:50:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-27 21:50:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-27 21:50:58,400 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-27 21:50:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,401 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-27 21:50:58,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-27 21:50:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:50:58,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:58,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:50:58,403 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,403 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-27 21:50:58,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54160612] [2020-08-27 21:50:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54160612] [2020-08-27 21:50:58,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506849680] [2020-08-27 21:50:58,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,459 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-27 21:50:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,491 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-27 21:50:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-27 21:50:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,493 INFO L225 Difference]: With dead ends: 112 [2020-08-27 21:50:58,493 INFO L226 Difference]: Without dead ends: 110 [2020-08-27 21:50:58,494 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 [2020-08-27 21:50:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-27 21:50:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-27 21:50:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-27 21:50:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-27 21:50:58,507 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-27 21:50:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,507 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-27 21:50:58,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-27 21:50:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:50:58,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:58,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:50:58,509 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-27 21:50:58,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149891255] [2020-08-27 21:50:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149891255] [2020-08-27 21:50:58,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018937099] [2020-08-27 21:50:58,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,572 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-27 21:50:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,609 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-27 21:50:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-27 21:50:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,612 INFO L225 Difference]: With dead ends: 184 [2020-08-27 21:50:58,612 INFO L226 Difference]: Without dead ends: 112 [2020-08-27 21:50:58,613 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 [2020-08-27 21:50:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-27 21:50:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-27 21:50:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-27 21:50:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-27 21:50:58,625 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-27 21:50:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,626 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-27 21:50:58,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,626 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-27 21:50:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-27 21:50:58,627 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,628 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] [2020-08-27 21:50:58,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:50:58,628 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,629 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-27 21:50:58,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037257810] [2020-08-27 21:50:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037257810] [2020-08-27 21:50:58,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117750132] [2020-08-27 21:50:58,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,675 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-27 21:50:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,695 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-27 21:50:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-27 21:50:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,698 INFO L225 Difference]: With dead ends: 165 [2020-08-27 21:50:58,698 INFO L226 Difference]: Without dead ends: 114 [2020-08-27 21:50:58,699 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 [2020-08-27 21:50:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-27 21:50:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-27 21:50:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-27 21:50:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-27 21:50:58,710 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-27 21:50:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,711 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-27 21:50:58,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,711 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-27 21:50:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-27 21:50:58,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:58,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:50:58,713 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,714 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-27 21:50:58,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995338962] [2020-08-27 21:50:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995338962] [2020-08-27 21:50:58,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055782576] [2020-08-27 21:50:58,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,755 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-27 21:50:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,774 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-27 21:50:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-27 21:50:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,777 INFO L225 Difference]: With dead ends: 204 [2020-08-27 21:50:58,777 INFO L226 Difference]: Without dead ends: 202 [2020-08-27 21:50:58,778 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 [2020-08-27 21:50:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-27 21:50:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-27 21:50:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-27 21:50:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-27 21:50:58,809 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-27 21:50:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,809 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-27 21:50:58,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-27 21:50:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-27 21:50:58,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,811 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] [2020-08-27 21:50:58,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:50:58,812 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-27 21:50:58,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408574908] [2020-08-27 21:50:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408574908] [2020-08-27 21:50:58,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069611178] [2020-08-27 21:50:58,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,851 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-27 21:50:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,872 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-27 21:50:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-27 21:50:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,875 INFO L225 Difference]: With dead ends: 352 [2020-08-27 21:50:58,875 INFO L226 Difference]: Without dead ends: 210 [2020-08-27 21:50:58,877 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 [2020-08-27 21:50:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-27 21:50:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-27 21:50:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-27 21:50:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-27 21:50:58,892 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-27 21:50:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,892 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-27 21:50:58,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-27 21:50:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-27 21:50:58,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:58,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:50:58,895 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,895 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-27 21:50:58,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259349735] [2020-08-27 21:50:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259349735] [2020-08-27 21:50:58,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607584315] [2020-08-27 21:50:58,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,929 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-27 21:50:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,957 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-27 21:50:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-27 21:50:58,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,960 INFO L225 Difference]: With dead ends: 312 [2020-08-27 21:50:58,960 INFO L226 Difference]: Without dead ends: 214 [2020-08-27 21:50:58,961 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 [2020-08-27 21:50:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-27 21:50:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-27 21:50:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-27 21:50:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-27 21:50:58,980 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-27 21:50:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,980 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-27 21:50:58,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-27 21:50:58,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-27 21:50:58,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,982 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] [2020-08-27 21:50:58,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:50:58,982 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,983 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-27 21:50:58,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859371468] [2020-08-27 21:50:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859371468] [2020-08-27 21:50:59,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188166067] [2020-08-27 21:50:59,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,018 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-27 21:50:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,040 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-27 21:50:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-27 21:50:59,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,043 INFO L225 Difference]: With dead ends: 380 [2020-08-27 21:50:59,043 INFO L226 Difference]: Without dead ends: 378 [2020-08-27 21:50:59,044 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 [2020-08-27 21:50:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-27 21:50:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-27 21:50:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-27 21:50:59,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-27 21:50:59,057 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-27 21:50:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,058 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-27 21:50:59,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,058 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-27 21:50:59,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-27 21:50:59,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,060 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] [2020-08-27 21:50:59,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:50:59,060 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,061 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-27 21:50:59,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664907536] [2020-08-27 21:50:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664907536] [2020-08-27 21:50:59,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890989146] [2020-08-27 21:50:59,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,096 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-27 21:50:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,121 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-27 21:50:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-27 21:50:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,124 INFO L225 Difference]: With dead ends: 684 [2020-08-27 21:50:59,124 INFO L226 Difference]: Without dead ends: 402 [2020-08-27 21:50:59,125 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 [2020-08-27 21:50:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-27 21:50:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-27 21:50:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-27 21:50:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-27 21:50:59,142 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-27 21:50:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,142 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-27 21:50:59,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-27 21:50:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-27 21:50:59,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,144 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] [2020-08-27 21:50:59,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:50:59,145 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-27 21:50:59,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639824985] [2020-08-27 21:50:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639824985] [2020-08-27 21:50:59,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83764478] [2020-08-27 21:50:59,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,177 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-27 21:50:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,206 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-27 21:50:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-27 21:50:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,209 INFO L225 Difference]: With dead ends: 600 [2020-08-27 21:50:59,211 INFO L226 Difference]: Without dead ends: 410 [2020-08-27 21:50:59,214 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 [2020-08-27 21:50:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-27 21:50:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-27 21:50:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-27 21:50:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-27 21:50:59,240 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-27 21:50:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,243 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-27 21:50:59,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-27 21:50:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-27 21:50:59,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,247 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] [2020-08-27 21:50:59,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:50:59,248 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-27 21:50:59,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813595264] [2020-08-27 21:50:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813595264] [2020-08-27 21:50:59,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500589719] [2020-08-27 21:50:59,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,299 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-27 21:50:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,333 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-27 21:50:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-27 21:50:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,338 INFO L225 Difference]: With dead ends: 716 [2020-08-27 21:50:59,338 INFO L226 Difference]: Without dead ends: 714 [2020-08-27 21:50:59,339 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 [2020-08-27 21:50:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-27 21:50:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-27 21:50:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-27 21:50:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-27 21:50:59,359 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-27 21:50:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,359 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-27 21:50:59,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-27 21:50:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-27 21:50:59,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,361 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] [2020-08-27 21:50:59,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:50:59,362 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-27 21:50:59,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669103218] [2020-08-27 21:50:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669103218] [2020-08-27 21:50:59,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801306443] [2020-08-27 21:50:59,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,394 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-27 21:50:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,424 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-27 21:50:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-27 21:50:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,429 INFO L225 Difference]: With dead ends: 1340 [2020-08-27 21:50:59,429 INFO L226 Difference]: Without dead ends: 778 [2020-08-27 21:50:59,431 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 [2020-08-27 21:50:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-27 21:50:59,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-27 21:50:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-27 21:50:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-27 21:50:59,456 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-27 21:50:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,457 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-27 21:50:59,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-27 21:50:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:50:59,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,459 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] [2020-08-27 21:50:59,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:50:59,459 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-27 21:50:59,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456094554] [2020-08-27 21:50:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456094554] [2020-08-27 21:50:59,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314053648] [2020-08-27 21:50:59,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,490 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-27 21:50:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,519 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-27 21:50:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-27 21:50:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,524 INFO L225 Difference]: With dead ends: 1164 [2020-08-27 21:50:59,524 INFO L226 Difference]: Without dead ends: 794 [2020-08-27 21:50:59,526 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 [2020-08-27 21:50:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-27 21:50:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-27 21:50:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-27 21:50:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-27 21:50:59,556 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-27 21:50:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,557 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-27 21:50:59,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-27 21:50:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:50:59,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,559 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] [2020-08-27 21:50:59,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-27 21:50:59,559 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-27 21:50:59,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379397832] [2020-08-27 21:50:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379397832] [2020-08-27 21:50:59,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078952481] [2020-08-27 21:50:59,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,613 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-27 21:50:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,656 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-27 21:50:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-27 21:50:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,664 INFO L225 Difference]: With dead ends: 1356 [2020-08-27 21:50:59,664 INFO L226 Difference]: Without dead ends: 1354 [2020-08-27 21:50:59,666 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 [2020-08-27 21:50:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-27 21:50:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-27 21:50:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-27 21:50:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-27 21:50:59,720 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-27 21:50:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,721 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-27 21:50:59,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-27 21:50:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:50:59,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,725 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] [2020-08-27 21:50:59,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-27 21:50:59,726 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-27 21:50:59,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896409899] [2020-08-27 21:50:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896409899] [2020-08-27 21:50:59,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742129061] [2020-08-27 21:50:59,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,765 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-27 21:50:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,808 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-27 21:50:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-27 21:50:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,818 INFO L225 Difference]: With dead ends: 2636 [2020-08-27 21:50:59,818 INFO L226 Difference]: Without dead ends: 1514 [2020-08-27 21:50:59,822 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 [2020-08-27 21:50:59,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-27 21:50:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-27 21:50:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-27 21:50:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-27 21:50:59,874 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-27 21:50:59,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,875 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-27 21:50:59,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-27 21:50:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:50:59,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,879 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] [2020-08-27 21:50:59,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-27 21:50:59,879 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-27 21:50:59,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990145887] [2020-08-27 21:50:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990145887] [2020-08-27 21:50:59,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718959262] [2020-08-27 21:50:59,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,915 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-27 21:50:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,961 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-27 21:50:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-27 21:50:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,969 INFO L225 Difference]: With dead ends: 2268 [2020-08-27 21:50:59,970 INFO L226 Difference]: Without dead ends: 1546 [2020-08-27 21:50:59,972 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 [2020-08-27 21:50:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-27 21:51:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-27 21:51:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-27 21:51:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-27 21:51:00,021 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-27 21:51:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,021 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-27 21:51:00,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-27 21:51:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:51:00,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,025 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] [2020-08-27 21:51:00,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-27 21:51:00,025 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-27 21:51:00,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803177488] [2020-08-27 21:51:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803177488] [2020-08-27 21:51:00,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:00,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277520222] [2020-08-27 21:51:00,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:00,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:00,074 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-27 21:51:00,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:00,142 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-27 21:51:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:00,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-27 21:51:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:00,159 INFO L225 Difference]: With dead ends: 2572 [2020-08-27 21:51:00,159 INFO L226 Difference]: Without dead ends: 2570 [2020-08-27 21:51:00,161 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 [2020-08-27 21:51:00,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-27 21:51:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-27 21:51:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-27 21:51:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-27 21:51:00,254 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-27 21:51:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,254 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-27 21:51:00,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-27 21:51:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:51:00,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,261 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] [2020-08-27 21:51:00,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-27 21:51:00,262 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,263 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-27 21:51:00,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132380376] [2020-08-27 21:51:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132380376] [2020-08-27 21:51:00,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:00,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951428718] [2020-08-27 21:51:00,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:00,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:00,311 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-27 21:51:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:00,414 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-27 21:51:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:00,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-27 21:51:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:00,430 INFO L225 Difference]: With dead ends: 5196 [2020-08-27 21:51:00,431 INFO L226 Difference]: Without dead ends: 2954 [2020-08-27 21:51:00,436 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 [2020-08-27 21:51:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-27 21:51:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-27 21:51:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-27 21:51:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-27 21:51:00,528 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-27 21:51:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,528 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-27 21:51:00,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-27 21:51:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:51:00,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,533 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] [2020-08-27 21:51:00,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-27 21:51:00,536 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-27 21:51:00,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418841489] [2020-08-27 21:51:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418841489] [2020-08-27 21:51:00,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:00,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986394882] [2020-08-27 21:51:00,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:00,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:00,570 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-27 21:51:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:00,630 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-27 21:51:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:00,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-27 21:51:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:00,644 INFO L225 Difference]: With dead ends: 4428 [2020-08-27 21:51:00,644 INFO L226 Difference]: Without dead ends: 3018 [2020-08-27 21:51:00,648 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 [2020-08-27 21:51:00,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-27 21:51:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-27 21:51:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-27 21:51:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-27 21:51:00,738 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-27 21:51:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,738 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-27 21:51:00,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-27 21:51:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:51:00,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,743 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] [2020-08-27 21:51:00,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-27 21:51:00,744 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,744 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-27 21:51:00,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477983787] [2020-08-27 21:51:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477983787] [2020-08-27 21:51:00,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:00,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056321283] [2020-08-27 21:51:00,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:00,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:00,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:00,774 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-27 21:51:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:00,889 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-27 21:51:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:00,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-27 21:51:00,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:00,903 INFO L225 Difference]: With dead ends: 8650 [2020-08-27 21:51:00,903 INFO L226 Difference]: Without dead ends: 3016 [2020-08-27 21:51:00,913 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 [2020-08-27 21:51:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-27 21:51:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-27 21:51:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-27 21:51:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-27 21:51:00,997 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-27 21:51:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,998 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-27 21:51:00,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-27 21:51:01,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:51:01,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:01,002 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] [2020-08-27 21:51:01,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-27 21:51:01,003 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:01,003 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-27 21:51:01,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:01,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55701532] [2020-08-27 21:51:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:01,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55701532] [2020-08-27 21:51:01,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:01,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:01,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541643062] [2020-08-27 21:51:01,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:01,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:01,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:01,028 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-27 21:51:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:01,068 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-27 21:51:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:01,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-27 21:51:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:01,069 INFO L225 Difference]: With dead ends: 3016 [2020-08-27 21:51:01,069 INFO L226 Difference]: Without dead ends: 0 [2020-08-27 21:51:01,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-27 21:51:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-27 21:51:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-27 21:51:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-27 21:51:01,075 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-27 21:51:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:01,075 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-27 21:51:01,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-27 21:51:01,076 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-27 21:51:01,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-27 21:51:01,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-27 21:51:01,102 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-27 21:51:01,103 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:51:01,103 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:51:01,103 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-27 21:51:01,103 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-27 21:51:01,103 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-27 21:51:01,103 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-27 21:51:01,103 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-27 21:51:01,104 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,104 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-27 21:51:01,104 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,104 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-27 21:51:01,104 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,104 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,104 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-27 21:51:01,104 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-27 21:51:01,105 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-27 21:51:01,105 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-27 21:51:01,105 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-27 21:51:01,105 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,105 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,105 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,106 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,106 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-27 21:51:01,106 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,106 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-27 21:51:01,106 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-27 21:51:01,106 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,106 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,106 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-27 21:51:01,107 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-27 21:51:01,107 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,107 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-27 21:51:01,107 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,107 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,107 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-27 21:51:01,107 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-27 21:51:01,107 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-27 21:51:01,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:51:01 BoogieIcfgContainer [2020-08-27 21:51:01,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:51:01,127 INFO L168 Benchmark]: Toolchain (without parser) took 4446.79 ms. Allocated memory was 139.5 MB in the beginning and 294.1 MB in the end (delta: 154.7 MB). Free memory was 102.3 MB in the beginning and 185.9 MB in the end (delta: -83.7 MB). Peak memory consumption was 71.0 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:01,128 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-27 21:51:01,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.97 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:01,129 INFO L168 Benchmark]: Boogie Preprocessor took 120.53 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:01,129 INFO L168 Benchmark]: RCFGBuilder took 378.70 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 162.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:01,130 INFO L168 Benchmark]: TraceAbstraction took 3596.11 ms. Allocated memory was 202.4 MB in the beginning and 294.1 MB in the end (delta: 91.8 MB). Free memory was 162.3 MB in the beginning and 185.9 MB in the end (delta: -23.7 MB). Peak memory consumption was 68.1 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:01,132 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 344.97 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.53 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 378.70 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 162.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3596.11 ms. Allocated memory was 202.4 MB in the beginning and 294.1 MB in the end (delta: 91.8 MB). Free memory was 162.3 MB in the beginning and 185.9 MB in the end (delta: -23.7 MB). Peak memory consumption was 68.1 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: 3.4s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s 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...