/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=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/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:08:01,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:08:01,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:08:01,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:08:01,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:08:01,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:08:01,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:08:01,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:08:01,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:08:01,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:08:01,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:08:01,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:08:01,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:08:01,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:08:01,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:08:01,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:08:01,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:08:01,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:08:01,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:08:01,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:08:01,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:08:01,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:08:01,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:08:01,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:08:01,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:08:01,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:08:01,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:08:01,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:08:01,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:08:01,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:08:01,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:08:01,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:08:01,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:08:01,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:08:01,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:08:01,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:08:01,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:08:01,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:08:01,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:08:01,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:08:01,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:08:01,497 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 [2020-09-24 17:08:01,548 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:08:01,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:08:01,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:08:01,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:08:01,551 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:08:01,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:08:01,552 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:08:01,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:08:01,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:08:01,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:08:01,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:08:01,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:08:01,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:08:01,555 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:08:01,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:08:01,555 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:08:01,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:08:01,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:08:01,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:08:01,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:08:01,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:08:01,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:08:01,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:08:01,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:08:01,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:08:01,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:08:01,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:08:01,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:08:01,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:08:01,558 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:08:02,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:08:02,061 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:08:02,067 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:08:02,069 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:08:02,070 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:08:02,071 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-24 17:08:02,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3448a57ff/94c60e44e7f14ef481a7e72d8ee796b5/FLAG4ce29b735 [2020-09-24 17:08:02,757 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:08:02,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-24 17:08:02,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3448a57ff/94c60e44e7f14ef481a7e72d8ee796b5/FLAG4ce29b735 [2020-09-24 17:08:03,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3448a57ff/94c60e44e7f14ef481a7e72d8ee796b5 [2020-09-24 17:08:03,147 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:08:03,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:08:03,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:08:03,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:08:03,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:08:03,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:08:03" (1/1) ... [2020-09-24 17:08:03,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e983976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03, skipping insertion in model container [2020-09-24 17:08:03,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:08:03" (1/1) ... [2020-09-24 17:08:03,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:08:03,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:08:03,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:08:03,437 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:08:03,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:08:03,565 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:08:03,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03 WrapperNode [2020-09-24 17:08:03,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:08:03,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:08:03,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:08:03,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:08:03,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03" (1/1) ... [2020-09-24 17:08:03,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03" (1/1) ... [2020-09-24 17:08:03,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03" (1/1) ... [2020-09-24 17:08:03,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03" (1/1) ... [2020-09-24 17:08:03,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03" (1/1) ... [2020-09-24 17:08:03,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03" (1/1) ... [2020-09-24 17:08:03,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03" (1/1) ... [2020-09-24 17:08:03,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:08:03,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:08:03,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:08:03,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:08:03,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03" (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 [2020-09-24 17:08:03,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:08:03,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:08:03,703 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 17:08:03,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:08:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:08:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:08:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 17:08:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 17:08:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 17:08:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:08:03,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 17:08:03,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 17:08:03,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 17:08:03,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 17:08:03,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:08:03,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:08:04,041 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:08:04,041 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 17:08:04,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:08:04 BoogieIcfgContainer [2020-09-24 17:08:04,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:08:04,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:08:04,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:08:04,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:08:04,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:08:03" (1/3) ... [2020-09-24 17:08:04,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b69fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:08:04, skipping insertion in model container [2020-09-24 17:08:04,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:03" (2/3) ... [2020-09-24 17:08:04,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b69fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:08:04, skipping insertion in model container [2020-09-24 17:08:04,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:08:04" (3/3) ... [2020-09-24 17:08:04,060 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-09-24 17:08:04,075 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:08:04,087 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:08:04,115 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:08:04,151 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:08:04,151 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:08:04,151 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:08:04,151 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:08:04,151 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:08:04,152 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:08:04,152 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:08:04,152 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:08:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-09-24 17:08:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 17:08:04,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:04,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:08:04,191 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash 144198137, now seen corresponding path program 1 times [2020-09-24 17:08:04,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:04,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152623435] [2020-09-24 17:08:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:04,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:04,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:04,650 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:04,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 17:08:04,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:08:04,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-09-24 17:08:04,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-24 17:08:04,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:04,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:08:04,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:04,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:04,768 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:04,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:04,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:04,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 17:08:04,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:04,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:04,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:04,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:04,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:04,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 17:08:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:04,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:04,798 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:04,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 17:08:04,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:04,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 17:08:04,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:04,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:04,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:08:04,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:04,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:04,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152623435] [2020-09-24 17:08:04,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:08:04,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:08:04,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551258176] [2020-09-24 17:08:04,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:08:04,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:04,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:08:04,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:08:04,867 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 3 states. [2020-09-24 17:08:05,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:05,081 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-09-24 17:08:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:08:05,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-09-24 17:08:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:05,097 INFO L225 Difference]: With dead ends: 124 [2020-09-24 17:08:05,098 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 17:08:05,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:08:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 17:08:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-24 17:08:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 17:08:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-24 17:08:05,151 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 44 [2020-09-24 17:08:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:05,151 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-24 17:08:05,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:08:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-24 17:08:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 17:08:05,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:05,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:08:05,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:08:05,155 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:05,156 INFO L82 PathProgramCache]: Analyzing trace with hash 608042528, now seen corresponding path program 1 times [2020-09-24 17:08:05,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:05,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481314836] [2020-09-24 17:08:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:05,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:05,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:06,256 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:06,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 17:08:06,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:08:06,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1071 [2020-09-24 17:08:06,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:06,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:08:06,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 17:08:06,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 17:08:06,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:06,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:06,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:06,312 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:06,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:06,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:06,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:08:06,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:06,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 17:08:06,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-24 17:08:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:06,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:06,340 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:06,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 17:08:06,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:06,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 17:08:06,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:06,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:06,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:08:06,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:06,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:06,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481314836] [2020-09-24 17:08:06,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:08:06,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:08:06,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506685169] [2020-09-24 17:08:06,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:08:06,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:06,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:08:06,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:08:06,356 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 4 states. [2020-09-24 17:08:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:06,491 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-09-24 17:08:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 17:08:06,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-09-24 17:08:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:06,494 INFO L225 Difference]: With dead ends: 104 [2020-09-24 17:08:06,494 INFO L226 Difference]: Without dead ends: 69 [2020-09-24 17:08:06,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:08:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-24 17:08:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-09-24 17:08:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-24 17:08:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-09-24 17:08:06,505 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 46 [2020-09-24 17:08:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:06,506 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-09-24 17:08:06,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:08:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-09-24 17:08:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 17:08:06,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:06,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1] [2020-09-24 17:08:06,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:08:06,509 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1644606330, now seen corresponding path program 1 times [2020-09-24 17:08:06,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:06,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934276610] [2020-09-24 17:08:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:06,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:06,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:07,955 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:07,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 17:08:07,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:08:07,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-09-24 17:08:07,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:07,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:08:07,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-24 17:08:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:08:07,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:08,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:08,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:08,156 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:08,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:08,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:08,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:08:08,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:08,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:08,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:08,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:08,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:08,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 17:08:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:08,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:08,172 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:08,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 17:08:08,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:08,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:08:08,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:08,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:08,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:08:08,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:08,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:08:08,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934276610] [2020-09-24 17:08:08,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:08:08,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 17:08:08,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513843862] [2020-09-24 17:08:08,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 17:08:08,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:08,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 17:08:08,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:08:08,185 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 9 states. [2020-09-24 17:08:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:08,537 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-09-24 17:08:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 17:08:08,538 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-09-24 17:08:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:08,539 INFO L225 Difference]: With dead ends: 82 [2020-09-24 17:08:08,540 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 17:08:08,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-24 17:08:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 17:08:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-09-24 17:08:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-24 17:08:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-24 17:08:08,548 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 56 [2020-09-24 17:08:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:08,549 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-24 17:08:08,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 17:08:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-24 17:08:08,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 17:08:08,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:08,551 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2020-09-24 17:08:08,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:08:08,552 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:08,552 INFO L82 PathProgramCache]: Analyzing trace with hash -922277614, now seen corresponding path program 1 times [2020-09-24 17:08:08,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:08,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437598114] [2020-09-24 17:08:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:08,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:08,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:09,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:13,840 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:13,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 17:08:13,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:08:13,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5273 [2020-09-24 17:08:13,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:13,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:08:13,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 17:08:13,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:08:13,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:13,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:13,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:13,921 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:13,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:13,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:13,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:08:13,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:13,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:13,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:13,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:13,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:13,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 17:08:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:13,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:13,943 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:13,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 17:08:13,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:13,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:08:13,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:08:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:13,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 17:08:13,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437598114] [2020-09-24 17:08:13,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:13,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:08:13,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314622640] [2020-09-24 17:08:13,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:08:13,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:13,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:08:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:08:13,962 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 6 states. [2020-09-24 17:08:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:14,142 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-09-24 17:08:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:08:14,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-09-24 17:08:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:14,144 INFO L225 Difference]: With dead ends: 118 [2020-09-24 17:08:14,145 INFO L226 Difference]: Without dead ends: 81 [2020-09-24 17:08:14,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:08:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-24 17:08:14,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-09-24 17:08:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 17:08:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-09-24 17:08:14,161 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 62 [2020-09-24 17:08:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:14,161 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-09-24 17:08:14,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:08:14,162 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-09-24 17:08:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 17:08:14,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:14,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 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, 1, 1, 1] [2020-09-24 17:08:14,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:08:14,168 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:14,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:14,170 INFO L82 PathProgramCache]: Analyzing trace with hash -327292308, now seen corresponding path program 2 times [2020-09-24 17:08:14,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:14,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132172043] [2020-09-24 17:08:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:14,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:14,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:15,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:22,216 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:22,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 17:08:22,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:08:22,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8024 [2020-09-24 17:08:22,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:08:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 17:08:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 17:08:22,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:22,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:22,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:22,411 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:22,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:22,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:22,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:08:22,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:22,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:22,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:22,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:22,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:22,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 17:08:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:22,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:22,433 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:22,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 17:08:22,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:22,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:08:22,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:22,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:22,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:08:22,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:22,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 17:08:22,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132172043] [2020-09-24 17:08:22,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:22,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 17:08:22,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153398414] [2020-09-24 17:08:22,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:08:22,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:22,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:08:22,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:08:22,461 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 10 states. [2020-09-24 17:08:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:22,950 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2020-09-24 17:08:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 17:08:22,951 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-09-24 17:08:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:22,953 INFO L225 Difference]: With dead ends: 98 [2020-09-24 17:08:22,953 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 17:08:22,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-24 17:08:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 17:08:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-09-24 17:08:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 17:08:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-09-24 17:08:22,972 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 72 [2020-09-24 17:08:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:22,975 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-09-24 17:08:22,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:08:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-09-24 17:08:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 17:08:22,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:22,980 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 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, 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] [2020-09-24 17:08:22,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:08:22,980 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:22,983 INFO L82 PathProgramCache]: Analyzing trace with hash -262020476, now seen corresponding path program 3 times [2020-09-24 17:08:22,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:22,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138647029] [2020-09-24 17:08:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:23,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:23,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:24,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:34,676 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:34,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 17:08:34,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:08:34,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11658 [2020-09-24 17:08:34,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 17:08:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 17:08:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 17:08:34,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:34,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:34,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:34,869 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:34,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:34,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:34,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:08:34,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:34,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:34,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-24 17:08:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:34,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:34,881 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:34,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 17:08:34,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:34,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:08:34,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:34,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:08:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:34,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 17:08:34,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138647029] [2020-09-24 17:08:34,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:34,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:08:34,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233716408] [2020-09-24 17:08:34,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:08:34,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:34,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:08:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:08:34,898 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 11 states. [2020-09-24 17:08:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:35,244 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2020-09-24 17:08:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 17:08:35,245 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-09-24 17:08:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:35,246 INFO L225 Difference]: With dead ends: 104 [2020-09-24 17:08:35,247 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 17:08:35,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-24 17:08:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 17:08:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2020-09-24 17:08:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 17:08:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-09-24 17:08:35,255 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 78 [2020-09-24 17:08:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:35,256 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-09-24 17:08:35,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:08:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-09-24 17:08:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 17:08:35,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:35,257 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:08:35,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:08:35,258 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:35,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1023502492, now seen corresponding path program 4 times [2020-09-24 17:08:35,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:35,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855033767] [2020-09-24 17:08:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:35,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:35,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:36,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:47,288 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:47,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-24 17:08:47,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:08:47,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12011 [2020-09-24 17:08:47,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:08:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 17:08:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 17:08:47,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:47,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:47,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:47,345 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:47,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:47,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:47,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:08:47,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:47,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:47,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:47,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 17:08:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:47,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:47,358 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:47,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 17:08:47,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:47,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:08:47,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:47,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:47,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:08:47,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:47,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 17:08:47,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855033767] [2020-09-24 17:08:47,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:47,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:08:47,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981975000] [2020-09-24 17:08:47,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:08:47,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:08:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:08:47,372 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 8 states. [2020-09-24 17:08:47,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:47,552 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-09-24 17:08:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:08:47,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-09-24 17:08:47,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:47,554 INFO L225 Difference]: With dead ends: 152 [2020-09-24 17:08:47,554 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 17:08:47,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:08:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 17:08:47,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-09-24 17:08:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-24 17:08:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-09-24 17:08:47,576 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 84 [2020-09-24 17:08:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:47,576 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-09-24 17:08:47,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:08:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-09-24 17:08:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-24 17:08:47,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:47,578 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:08:47,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:08:47,578 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:47,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1039223414, now seen corresponding path program 5 times [2020-09-24 17:08:47,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:47,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206574667] [2020-09-24 17:08:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:47,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:47,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:49,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking...