/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:06:23,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:06:23,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:06:23,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:06:23,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:06:23,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:06:23,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:06:23,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:06:23,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:06:23,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:06:23,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:06:23,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:06:23,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:06:23,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:06:23,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:06:23,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:06:23,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:06:23,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:06:23,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:06:23,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:06:23,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:06:23,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:06:23,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:06:23,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:06:23,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:06:23,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:06:23,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:06:23,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:06:23,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:06:23,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 14:06:23,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:06:23,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:06:23,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:06:23,730 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 [2020-08-21 14:06:23,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:06:23,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:06:23,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:06:23,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:06:23,763 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:06:23,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:06:23,764 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:06:23,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:06:23,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:06:23,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:06:23,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:06:23,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:06:23,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:06:23,765 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:06:23,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:06:23,765 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:06:23,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:06:23,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:06:23,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:06:23,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:06:23,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:06:23,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:06:23,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:06:23,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:06:23,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:06:23,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:06:23,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:06:23,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:06:23,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:06:23,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> log-additional-information=true; [2020-08-21 14:06:24,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:06:24,110 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:06:24,113 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:06:24,115 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:06:24,116 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:06:24,116 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-08-21 14:06:24,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad3e6a868/dccb362bd23247268cadbad01f7bb8dc/FLAG22b1348bc [2020-08-21 14:06:24,715 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:06:24,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-08-21 14:06:24,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad3e6a868/dccb362bd23247268cadbad01f7bb8dc/FLAG22b1348bc [2020-08-21 14:06:25,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad3e6a868/dccb362bd23247268cadbad01f7bb8dc [2020-08-21 14:06:25,150 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:06:25,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:06:25,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:06:25,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:06:25,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:06:25,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:06:25" (1/1) ... [2020-08-21 14:06:25,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17135c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25, skipping insertion in model container [2020-08-21 14:06:25,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:06:25" (1/1) ... [2020-08-21 14:06:25,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:06:25,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:06:25,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:06:25,443 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:06:25,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:06:25,478 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:06:25,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25 WrapperNode [2020-08-21 14:06:25,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:06:25,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:06:25,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:06:25,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:06:25,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25" (1/1) ... [2020-08-21 14:06:25,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25" (1/1) ... [2020-08-21 14:06:25,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25" (1/1) ... [2020-08-21 14:06:25,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25" (1/1) ... [2020-08-21 14:06:25,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25" (1/1) ... [2020-08-21 14:06:25,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25" (1/1) ... [2020-08-21 14:06:25,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25" (1/1) ... [2020-08-21 14:06:25,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:06:25,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:06:25,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:06:25,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:06:25,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25" (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 [2020-08-21 14:06:25,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:06:25,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:06:25,666 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-21 14:06:25,666 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-21 14:06:25,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:06:25,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:06:25,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:06:25,666 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-21 14:06:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-21 14:06:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:06:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:06:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:06:25,864 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:06:25,865 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:06:25,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:06:25 BoogieIcfgContainer [2020-08-21 14:06:25,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:06:25,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:06:25,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:06:25,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:06:25,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:06:25" (1/3) ... [2020-08-21 14:06:25,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264814c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:06:25, skipping insertion in model container [2020-08-21 14:06:25,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:25" (2/3) ... [2020-08-21 14:06:25,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264814c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:06:25, skipping insertion in model container [2020-08-21 14:06:25,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:06:25" (3/3) ... [2020-08-21 14:06:25,879 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-08-21 14:06:25,893 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:06:25,903 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:06:25,933 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:06:25,976 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:06:25,976 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:06:25,976 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:06:25,976 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:06:25,977 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:06:25,977 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:06:25,977 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:06:25,978 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:06:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 14:06:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 14:06:26,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:26,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:26,009 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:26,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:26,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-21 14:06:26,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:26,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236206931] [2020-08-21 14:06:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:06:26,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236206931] [2020-08-21 14:06:26,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:06:26,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:06:26,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876333742] [2020-08-21 14:06:26,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:06:26,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:06:26,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:06:26,252 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-21 14:06:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:26,382 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-21 14:06:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:06:26,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 14:06:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:26,394 INFO L225 Difference]: With dead ends: 44 [2020-08-21 14:06:26,394 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 14:06:26,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:06:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 14:06:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 14:06:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 14:06:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 14:06:26,441 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-21 14:06:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:26,442 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 14:06:26,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:06:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 14:06:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:06:26,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:26,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:26,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:06:26,445 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:26,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:26,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-21 14:06:26,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:26,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813439732] [2020-08-21 14:06:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:06:26,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813439732] [2020-08-21 14:06:26,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:06:26,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:06:26,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209228700] [2020-08-21 14:06:26,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:06:26,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:26,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:06:26,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:06:26,520 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-21 14:06:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:26,582 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-21 14:06:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:06:26,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 14:06:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:26,585 INFO L225 Difference]: With dead ends: 36 [2020-08-21 14:06:26,585 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 14:06:26,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:06:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 14:06:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 14:06:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 14:06:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 14:06:26,598 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-21 14:06:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:26,599 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 14:06:26,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:06:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 14:06:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:06:26,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:26,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:26,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:06:26,602 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:26,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-21 14:06:26,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:26,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441478332] [2020-08-21 14:06:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:06:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 14:06:26,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441478332] [2020-08-21 14:06:26,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:26,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:06:26,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10031674] [2020-08-21 14:06:26,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:06:26,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:26,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:06:26,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:06:26,739 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-21 14:06:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:26,827 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-21 14:06:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:06:26,828 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 14:06:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:26,830 INFO L225 Difference]: With dead ends: 58 [2020-08-21 14:06:26,830 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 14:06:26,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:06:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 14:06:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 14:06:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 14:06:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-21 14:06:26,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-21 14:06:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:26,843 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-21 14:06:26,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:06:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-21 14:06:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:06:26,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:26,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:26,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:06:26,847 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:26,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:26,847 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-21 14:06:26,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:26,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565146803] [2020-08-21 14:06:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:26,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 14:06:27,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565146803] [2020-08-21 14:06:27,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:27,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:06:27,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127563407] [2020-08-21 14:06:27,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:06:27,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:27,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:06:27,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:06:27,057 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-21 14:06:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:27,279 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-21 14:06:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:06:27,280 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 14:06:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:27,284 INFO L225 Difference]: With dead ends: 54 [2020-08-21 14:06:27,284 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 14:06:27,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:06:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 14:06:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-21 14:06:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 14:06:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-21 14:06:27,302 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-21 14:06:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:27,303 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-21 14:06:27,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:06:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-21 14:06:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 14:06:27,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:27,306 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1] [2020-08-21 14:06:27,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:06:27,306 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:27,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-21 14:06:27,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:27,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923452292] [2020-08-21 14:06:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:06:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:06:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 14:06:27,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923452292] [2020-08-21 14:06:27,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:27,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 14:06:27,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150267962] [2020-08-21 14:06:27,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:06:27,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:27,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:06:27,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:06:27,431 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-21 14:06:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:27,510 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-21 14:06:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:06:27,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-21 14:06:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:27,513 INFO L225 Difference]: With dead ends: 94 [2020-08-21 14:06:27,513 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 14:06:27,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:06:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 14:06:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-21 14:06:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 14:06:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-21 14:06:27,528 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-21 14:06:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:27,528 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-21 14:06:27,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:06:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-21 14:06:27,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 14:06:27,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:27,531 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1] [2020-08-21 14:06:27,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:06:27,532 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:27,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:27,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-21 14:06:27,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:27,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767717768] [2020-08-21 14:06:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 14:06:27,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767717768] [2020-08-21 14:06:27,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:27,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:06:27,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481314836] [2020-08-21 14:06:27,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:06:27,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:27,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:06:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:06:27,756 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-21 14:06:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:27,865 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-21 14:06:27,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:06:27,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 14:06:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:27,868 INFO L225 Difference]: With dead ends: 103 [2020-08-21 14:06:27,868 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 14:06:27,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:06:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 14:06:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 14:06:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 14:06:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-21 14:06:27,882 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-21 14:06:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:27,883 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-21 14:06:27,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:06:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-21 14:06:27,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 14:06:27,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:27,886 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1, 1] [2020-08-21 14:06:27,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:06:27,886 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:27,887 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-21 14:06:27,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:27,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934276610] [2020-08-21 14:06:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:27,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 14:06:28,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934276610] [2020-08-21 14:06:28,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:28,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:06:28,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612174585] [2020-08-21 14:06:28,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:06:28,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:06:28,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:06:28,019 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-21 14:06:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:28,249 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-21 14:06:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:06:28,250 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-21 14:06:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:28,253 INFO L225 Difference]: With dead ends: 86 [2020-08-21 14:06:28,253 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 14:06:28,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:06:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 14:06:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-21 14:06:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 14:06:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-21 14:06:28,272 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-21 14:06:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:28,273 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-21 14:06:28,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:06:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-21 14:06:28,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 14:06:28,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:28,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:28,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:06:28,278 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:28,279 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-21 14:06:28,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:28,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649930976] [2020-08-21 14:06:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 14:06:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-21 14:06:28,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649930976] [2020-08-21 14:06:28,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:28,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:06:28,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285447672] [2020-08-21 14:06:28,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:06:28,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:28,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:06:28,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:06:28,529 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-21 14:06:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:28,647 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-21 14:06:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:06:28,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-21 14:06:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:28,650 INFO L225 Difference]: With dead ends: 167 [2020-08-21 14:06:28,650 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 14:06:28,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:06:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 14:06:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-21 14:06:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 14:06:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-21 14:06:28,670 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-21 14:06:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:28,671 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-21 14:06:28,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:06:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-21 14:06:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 14:06:28,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:28,678 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:28,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:06:28,678 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:28,679 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-21 14:06:28,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:28,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911361150] [2020-08-21 14:06:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 14:06:28,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911361150] [2020-08-21 14:06:28,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:28,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:06:28,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749742004] [2020-08-21 14:06:28,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:06:28,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:28,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:06:28,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:06:28,856 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-21 14:06:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:29,103 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-21 14:06:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:06:29,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-21 14:06:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:29,107 INFO L225 Difference]: With dead ends: 188 [2020-08-21 14:06:29,107 INFO L226 Difference]: Without dead ends: 109 [2020-08-21 14:06:29,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:06:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-21 14:06:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-21 14:06:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 14:06:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-21 14:06:29,127 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-21 14:06:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:29,128 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-21 14:06:29,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:06:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-21 14:06:29,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 14:06:29,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:29,130 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:29,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:06:29,131 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:29,131 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-21 14:06:29,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:29,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486560399] [2020-08-21 14:06:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-21 14:06:29,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486560399] [2020-08-21 14:06:29,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:29,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:06:29,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852108592] [2020-08-21 14:06:29,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:06:29,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:29,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:06:29,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:06:29,350 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-21 14:06:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:29,773 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-21 14:06:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 14:06:29,775 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-21 14:06:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:29,777 INFO L225 Difference]: With dead ends: 199 [2020-08-21 14:06:29,777 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 14:06:29,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-21 14:06:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 14:06:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-21 14:06:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 14:06:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-21 14:06:29,799 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-21 14:06:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:29,800 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-21 14:06:29,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:06:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-21 14:06:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 14:06:29,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:29,803 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:29,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:06:29,804 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:29,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-21 14:06:29,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:29,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400205499] [2020-08-21 14:06:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:29,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 14:06:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-21 14:06:30,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400205499] [2020-08-21 14:06:30,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:30,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:06:30,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090812255] [2020-08-21 14:06:30,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:06:30,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:30,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:06:30,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:06:30,060 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-21 14:06:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:30,252 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-21 14:06:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:06:30,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-21 14:06:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:30,254 INFO L225 Difference]: With dead ends: 142 [2020-08-21 14:06:30,254 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 14:06:30,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:06:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 14:06:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 14:06:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 14:06:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-21 14:06:30,271 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-21 14:06:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:30,271 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-21 14:06:30,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:06:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-21 14:06:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-21 14:06:30,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:30,274 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:30,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:06:30,275 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:30,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-21 14:06:30,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:30,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340414434] [2020-08-21 14:06:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 14:06:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 14:06:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 14:06:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 133 proven. 373 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-08-21 14:06:30,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340414434] [2020-08-21 14:06:30,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:30,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 14:06:30,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831521460] [2020-08-21 14:06:30,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 14:06:30,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:30,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 14:06:30,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:06:30,845 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 15 states. [2020-08-21 14:06:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:31,480 INFO L93 Difference]: Finished difference Result 184 states and 282 transitions. [2020-08-21 14:06:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 14:06:31,481 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 192 [2020-08-21 14:06:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:31,483 INFO L225 Difference]: With dead ends: 184 [2020-08-21 14:06:31,483 INFO L226 Difference]: Without dead ends: 111 [2020-08-21 14:06:31,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-08-21 14:06:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-21 14:06:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-08-21 14:06:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 14:06:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-08-21 14:06:31,499 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 192 [2020-08-21 14:06:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:31,500 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-08-21 14:06:31,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 14:06:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-08-21 14:06:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 14:06:31,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:31,503 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:31,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:06:31,503 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 1 times [2020-08-21 14:06:31,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:31,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984564175] [2020-08-21 14:06:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:06:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 14:06:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 109 proven. 85 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-08-21 14:06:31,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984564175] [2020-08-21 14:06:31,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:31,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:06:31,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309356096] [2020-08-21 14:06:31,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:06:31,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:31,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:06:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:06:31,817 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states. [2020-08-21 14:06:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:32,099 INFO L93 Difference]: Finished difference Result 188 states and 266 transitions. [2020-08-21 14:06:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:06:32,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-21 14:06:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:32,104 INFO L225 Difference]: With dead ends: 188 [2020-08-21 14:06:32,104 INFO L226 Difference]: Without dead ends: 101 [2020-08-21 14:06:32,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:06:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-21 14:06:32,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-08-21 14:06:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-21 14:06:32,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-08-21 14:06:32,123 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 136 [2020-08-21 14:06:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:32,125 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-08-21 14:06:32,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:06:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-08-21 14:06:32,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-21 14:06:32,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:32,132 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:32,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:06:32,133 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times [2020-08-21 14:06:32,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:32,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669888200] [2020-08-21 14:06:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:06:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-21 14:06:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 138 proven. 250 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2020-08-21 14:06:32,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669888200] [2020-08-21 14:06:32,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:32,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:06:32,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682483302] [2020-08-21 14:06:32,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:06:32,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:32,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:06:32,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:06:32,585 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 14 states. [2020-08-21 14:06:33,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:33,121 INFO L93 Difference]: Finished difference Result 217 states and 326 transitions. [2020-08-21 14:06:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 14:06:33,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 177 [2020-08-21 14:06:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:33,124 INFO L225 Difference]: With dead ends: 217 [2020-08-21 14:06:33,124 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 14:06:33,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:06:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 14:06:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2020-08-21 14:06:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 14:06:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions. [2020-08-21 14:06:33,141 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 177 [2020-08-21 14:06:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:33,141 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions. [2020-08-21 14:06:33,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:06:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions. [2020-08-21 14:06:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 14:06:33,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:33,144 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:33,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:06:33,145 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:33,145 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times [2020-08-21 14:06:33,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:33,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014385981] [2020-08-21 14:06:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:06:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 14:06:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-08-21 14:06:33,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014385981] [2020-08-21 14:06:33,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:33,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:06:33,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411623149] [2020-08-21 14:06:33,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:06:33,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:06:33,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:06:33,516 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 14 states. [2020-08-21 14:06:33,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:33,976 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2020-08-21 14:06:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 14:06:33,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-21 14:06:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:33,978 INFO L225 Difference]: With dead ends: 211 [2020-08-21 14:06:33,979 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 14:06:33,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-21 14:06:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 14:06:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-08-21 14:06:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 14:06:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2020-08-21 14:06:33,989 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 150 [2020-08-21 14:06:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:33,990 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2020-08-21 14:06:33,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:06:33,990 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2020-08-21 14:06:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-21 14:06:33,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:33,992 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:33,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:06:33,993 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:33,993 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times [2020-08-21 14:06:33,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:33,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930413616] [2020-08-21 14:06:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:06:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 14:06:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:34,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-08-21 14:06:35,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930413616] [2020-08-21 14:06:35,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:35,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 14:06:35,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882240889] [2020-08-21 14:06:35,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 14:06:35,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:35,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 14:06:35,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:06:35,085 INFO L87 Difference]: Start difference. First operand 111 states and 147 transitions. Second operand 28 states. [2020-08-21 14:06:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:35,825 INFO L93 Difference]: Finished difference Result 124 states and 167 transitions. [2020-08-21 14:06:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 14:06:35,826 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 177 [2020-08-21 14:06:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:35,827 INFO L225 Difference]: With dead ends: 124 [2020-08-21 14:06:35,828 INFO L226 Difference]: Without dead ends: 120 [2020-08-21 14:06:35,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 14:06:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-21 14:06:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-08-21 14:06:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-08-21 14:06:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions. [2020-08-21 14:06:35,841 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 177 [2020-08-21 14:06:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:35,842 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 157 transitions. [2020-08-21 14:06:35,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 14:06:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions. [2020-08-21 14:06:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-08-21 14:06:35,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:35,845 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:35,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:06:35,845 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash -678687486, now seen corresponding path program 5 times [2020-08-21 14:06:35,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:35,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499175121] [2020-08-21 14:06:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:35,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:35,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:35,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:06:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 14:06:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:06:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 207 proven. 371 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2020-08-21 14:06:36,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499175121] [2020-08-21 14:06:36,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:36,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 14:06:36,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553105513] [2020-08-21 14:06:36,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 14:06:36,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:36,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 14:06:36,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:06:36,432 INFO L87 Difference]: Start difference. First operand 116 states and 157 transitions. Second operand 16 states. [2020-08-21 14:06:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:37,165 INFO L93 Difference]: Finished difference Result 245 states and 365 transitions. [2020-08-21 14:06:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 14:06:37,165 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 218 [2020-08-21 14:06:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:37,167 INFO L225 Difference]: With dead ends: 245 [2020-08-21 14:06:37,168 INFO L226 Difference]: Without dead ends: 134 [2020-08-21 14:06:37,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 14:06:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-21 14:06:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 120. [2020-08-21 14:06:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 14:06:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 159 transitions. [2020-08-21 14:06:37,180 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 159 transitions. Word has length 218 [2020-08-21 14:06:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:37,180 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 159 transitions. [2020-08-21 14:06:37,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 14:06:37,180 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 159 transitions. [2020-08-21 14:06:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-08-21 14:06:37,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:37,185 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 16, 15, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:37,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:06:37,185 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:37,186 INFO L82 PathProgramCache]: Analyzing trace with hash -806788011, now seen corresponding path program 6 times [2020-08-21 14:06:37,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:37,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812097482] [2020-08-21 14:06:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:06:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 14:06:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:06:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-21 14:06:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 177 proven. 317 refuted. 0 times theorem prover too weak. 1315 trivial. 0 not checked. [2020-08-21 14:06:37,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812097482] [2020-08-21 14:06:37,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:37,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:06:37,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217350430] [2020-08-21 14:06:37,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:06:37,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:37,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:06:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:06:37,809 INFO L87 Difference]: Start difference. First operand 120 states and 159 transitions. Second operand 11 states. [2020-08-21 14:06:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:38,093 INFO L93 Difference]: Finished difference Result 233 states and 321 transitions. [2020-08-21 14:06:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:06:38,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 260 [2020-08-21 14:06:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:38,096 INFO L225 Difference]: With dead ends: 233 [2020-08-21 14:06:38,096 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 14:06:38,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:06:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 14:06:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-08-21 14:06:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-21 14:06:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2020-08-21 14:06:38,107 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 260 [2020-08-21 14:06:38,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:38,108 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2020-08-21 14:06:38,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:06:38,108 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2020-08-21 14:06:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-08-21 14:06:38,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:38,113 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 17, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:38,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:06:38,113 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1614185823, now seen corresponding path program 7 times [2020-08-21 14:06:38,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:38,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721002496] [2020-08-21 14:06:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:06:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 14:06:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-21 14:06:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:06:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:06:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:06:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:06:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:06:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 132 proven. 466 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2020-08-21 14:06:38,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721002496] [2020-08-21 14:06:38,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:38,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:06:38,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653916608] [2020-08-21 14:06:38,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:06:38,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:06:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:06:38,770 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand 12 states. [2020-08-21 14:06:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:39,089 INFO L93 Difference]: Finished difference Result 141 states and 187 transitions. [2020-08-21 14:06:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:06:39,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 286 [2020-08-21 14:06:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:39,091 INFO L225 Difference]: With dead ends: 141 [2020-08-21 14:06:39,092 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:06:39,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:06:39,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:06:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:06:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:06:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:06:39,094 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 286 [2020-08-21 14:06:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:39,094 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:06:39,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:06:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:06:39,094 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:06:39,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:06:39,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:06:40,104 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 29 [2020-08-21 14:06:40,770 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 32 [2020-08-21 14:06:40,775 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:06:40,775 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:06:40,776 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:06:40,776 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:06:40,776 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:06:40,776 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:06:40,777 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-21 14:06:40,777 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-21 14:06:40,777 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-21 14:06:40,777 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-21 14:06:40,777 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-21 14:06:40,777 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 14:06:40,777 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 6 main_~x~0) (<= main_~x~0 6)) [2020-08-21 14:06:40,778 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-21 14:06:40,778 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-21 14:06:40,778 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-21 14:06:40,778 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-08-21 14:06:40,778 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 14:06:40,778 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= 4 fibo2_~n) (<= 2 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 4) (<= |fibo2_#t~ret2| 2) .cse0) (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3) .cse0 (<= 5 |fibo2_#in~n|)) (and .cse0 (<= 6 |fibo2_#in~n|)) (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 2)))) (not (<= |fibo2_#in~n| 1))) [2020-08-21 14:06:40,778 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-21 14:06:40,779 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-21 14:06:40,779 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-21 14:06:40,779 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-21 14:06:40,779 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-21 14:06:40,779 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-21 14:06:40,779 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-08-21 14:06:40,779 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-21 14:06:40,780 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|) (<= fibo1_~n 3)) (not (<= |fibo1_#in~n| 4)) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) (<= 4 |fibo1_#in~n|))) (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 5 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 5) .cse0) (and (<= fibo1_~n 5) .cse0) (and (<= 7 |fibo1_#in~n|) .cse0)))) [2020-08-21 14:06:40,780 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-21 14:06:40,780 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-21 14:06:40,780 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-21 14:06:40,780 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-21 14:06:40,780 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-21 14:06:40,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:06:40 BoogieIcfgContainer [2020-08-21 14:06:40,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:06:40,788 INFO L168 Benchmark]: Toolchain (without parser) took 15637.01 ms. Allocated memory was 149.4 MB in the beginning and 470.8 MB in the end (delta: 321.4 MB). Free memory was 105.8 MB in the beginning and 142.6 MB in the end (delta: -36.8 MB). Peak memory consumption was 297.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:06:40,789 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 149.4 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:06:40,790 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.53 ms. Allocated memory is still 149.4 MB. Free memory was 105.6 MB in the beginning and 95.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:06:40,791 INFO L168 Benchmark]: Boogie Preprocessor took 116.88 ms. Allocated memory was 149.4 MB in the beginning and 203.4 MB in the end (delta: 54.0 MB). Free memory was 95.9 MB in the beginning and 181.8 MB in the end (delta: -86.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:06:40,791 INFO L168 Benchmark]: RCFGBuilder took 274.36 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 168.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:06:40,792 INFO L168 Benchmark]: TraceAbstraction took 14914.72 ms. Allocated memory was 203.4 MB in the beginning and 470.8 MB in the end (delta: 267.4 MB). Free memory was 167.5 MB in the beginning and 142.6 MB in the end (delta: 24.9 MB). Peak memory consumption was 304.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:06:40,795 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 149.4 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 325.53 ms. Allocated memory is still 149.4 MB. Free memory was 105.6 MB in the beginning and 95.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.88 ms. Allocated memory was 149.4 MB in the beginning and 203.4 MB in the end (delta: 54.0 MB). Free memory was 95.9 MB in the beginning and 181.8 MB in the end (delta: -86.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 274.36 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 168.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14914.72 ms. Allocated memory was 203.4 MB in the beginning and 470.8 MB in the end (delta: 267.4 MB). Free memory was 167.5 MB in the beginning and 142.6 MB in the end (delta: 24.9 MB). Peak memory consumption was 304.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.1s, OverallIterations: 19, TraceHistogramMax: 21, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 636 SDtfs, 595 SDslu, 4407 SDs, 0 SdLazy, 4312 SolverSat, 448 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 973 GetRequests, 691 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 98 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 647 PreInvPairs, 912 NumberOfFragments, 138 HoareAnnotationTreeSize, 647 FomulaSimplifications, 2845 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4707 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 2097 NumberOfCodeBlocks, 2097 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 2078 ConstructedInterpolants, 0 QuantifiedInterpolants, 641722 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 2 PerfectInterpolantSequences, 6946/9383 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...