/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 SequenceOfStatements --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:01:18,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:01:18,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:01:18,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:01:18,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:01:18,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:01:18,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:01:18,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:01:18,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:01:18,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:01:18,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:01:18,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:01:18,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:01:18,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:01:18,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:01:18,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:01:18,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:01:18,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:01:18,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:01:18,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:01:18,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:01:18,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:01:18,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:01:18,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:01:18,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:01:18,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:01:18,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:01:18,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:01:18,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:01:18,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:01:18,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:01:18,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:01:18,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:01:18,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:01:18,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:01:18,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:01:18,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:01:18,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:01:18,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:01:18,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:01:18,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:01:18,541 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 [2020-10-12 20:01:18,583 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:01:18,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:01:18,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:01:18,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:01:18,586 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:01:18,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:01:18,587 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:01:18,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:01:18,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:01:18,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:01:18,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:01:18,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:01:18,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:01:18,589 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:01:18,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:01:18,589 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:01:18,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:01:18,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:01:18,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:01:18,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:01:18,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:01:18,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:01:18,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:01:18,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:01:18,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:01:18,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:01:18,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:01:18,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:01:18,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:01:18,592 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 -> SequenceOfStatements 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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:01:18,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:01:18,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:01:18,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:01:18,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:01:18,883 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:01:18,884 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:01:18,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f3530ecc/514a76546bb74fbeb7791da14138b889/FLAG02ac5360e [2020-10-12 20:01:19,432 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:01:19,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:01:19,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f3530ecc/514a76546bb74fbeb7791da14138b889/FLAG02ac5360e [2020-10-12 20:01:19,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f3530ecc/514a76546bb74fbeb7791da14138b889 [2020-10-12 20:01:19,849 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:01:19,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:01:19,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:01:19,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:01:19,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:01:19,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:01:19" (1/1) ... [2020-10-12 20:01:19,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b090d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:19, skipping insertion in model container [2020-10-12 20:01:19,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:01:19" (1/1) ... [2020-10-12 20:01:19,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:01:19,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:01:20,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:01:20,192 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:01:20,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:01:20,364 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:01:20,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:20 WrapperNode [2020-10-12 20:01:20,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:01:20,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:01:20,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:01:20,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:01:20,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:20" (1/1) ... [2020-10-12 20:01:20,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:20" (1/1) ... [2020-10-12 20:01:20,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:20" (1/1) ... [2020-10-12 20:01:20,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:20" (1/1) ... [2020-10-12 20:01:20,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:20" (1/1) ... [2020-10-12 20:01:20,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:20" (1/1) ... [2020-10-12 20:01:20,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:20" (1/1) ... [2020-10-12 20:01:20,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:01:20,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:01:20,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:01:20,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:01:20,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:20" (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 [2020-10-12 20:01:20,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:01:20,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:01:20,476 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:01:20,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:01:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:01:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:01:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:01:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:01:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:01:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:01:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:01:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:01:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:01:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:01:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:01:20,478 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:01:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:01:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:01:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:01:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:01:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:01:20,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:01:21,100 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:01:21,101 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:01:21,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:01:21 BoogieIcfgContainer [2020-10-12 20:01:21,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:01:21,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:01:21,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:01:21,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:01:21,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:01:19" (1/3) ... [2020-10-12 20:01:21,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1ae6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:01:21, skipping insertion in model container [2020-10-12 20:01:21,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:01:20" (2/3) ... [2020-10-12 20:01:21,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1ae6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:01:21, skipping insertion in model container [2020-10-12 20:01:21,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:01:21" (3/3) ... [2020-10-12 20:01:21,116 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:01:21,128 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:01:21,136 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:01:21,150 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:01:21,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:01:21,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:01:21,181 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:01:21,181 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:01:21,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:01:21,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:01:21,182 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:01:21,182 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:01:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states. [2020-10-12 20:01:21,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 20:01:21,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:21,217 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] [2020-10-12 20:01:21,217 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:21,225 INFO L82 PathProgramCache]: Analyzing trace with hash 794325759, now seen corresponding path program 1 times [2020-10-12 20:01:21,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:21,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829460425] [2020-10-12 20:01:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:21,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:21,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:21,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:22,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:23,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:23,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 20:01:23,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:01:23,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2224 [2020-10-12 20:01:23,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:23,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:01:23,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:01:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 20:01:23,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 20:01:24,057 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:01:24,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:24,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:24,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:24,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:24,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:24,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 20:01:24,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:24,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:24,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:24,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:24,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:24,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829460425] [2020-10-12 20:01:24,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:24,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:01:24,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430943386] [2020-10-12 20:01:24,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:01:24,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:24,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:01:24,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:01:24,153 INFO L87 Difference]: Start difference. First operand 112 states. Second operand 7 states. [2020-10-12 20:01:24,395 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-12 20:01:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:25,005 INFO L93 Difference]: Finished difference Result 517 states and 812 transitions. [2020-10-12 20:01:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:01:25,007 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-12 20:01:25,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:25,026 INFO L225 Difference]: With dead ends: 517 [2020-10-12 20:01:25,027 INFO L226 Difference]: Without dead ends: 416 [2020-10-12 20:01:25,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:01:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-12 20:01:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 183. [2020-10-12 20:01:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 20:01:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 272 transitions. [2020-10-12 20:01:25,119 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 272 transitions. Word has length 52 [2020-10-12 20:01:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:25,121 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 272 transitions. [2020-10-12 20:01:25,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:01:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 272 transitions. [2020-10-12 20:01:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 20:01:25,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:25,133 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] [2020-10-12 20:01:25,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:01:25,134 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1164237997, now seen corresponding path program 1 times [2020-10-12 20:01:25,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:25,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024650063] [2020-10-12 20:01:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:25,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:25,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:26,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:26,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 20:01:26,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:01:26,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 992 [2020-10-12 20:01:26,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:26,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:01:26,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 20:01:26,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 20:01:26,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:26,534 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:01:26,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:26,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:26,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:26,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:26,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:26,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:01:26,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:26,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:26,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:26,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:26,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:26,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024650063] [2020-10-12 20:01:26,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:26,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:01:26,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551903392] [2020-10-12 20:01:26,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:01:26,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:01:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:01:26,596 INFO L87 Difference]: Start difference. First operand 183 states and 272 transitions. Second operand 5 states. [2020-10-12 20:01:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:27,219 INFO L93 Difference]: Finished difference Result 339 states and 517 transitions. [2020-10-12 20:01:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:01:27,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-10-12 20:01:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:27,223 INFO L225 Difference]: With dead ends: 339 [2020-10-12 20:01:27,223 INFO L226 Difference]: Without dead ends: 337 [2020-10-12 20:01:27,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:01:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-12 20:01:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 187. [2020-10-12 20:01:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 20:01:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 276 transitions. [2020-10-12 20:01:27,243 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 276 transitions. Word has length 53 [2020-10-12 20:01:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:27,244 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 276 transitions. [2020-10-12 20:01:27,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:01:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 276 transitions. [2020-10-12 20:01:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 20:01:27,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:27,246 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] [2020-10-12 20:01:27,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:01:27,247 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1722019794, now seen corresponding path program 1 times [2020-10-12 20:01:27,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:27,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465874396] [2020-10-12 20:01:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:27,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:27,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:27,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:27,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:27,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:27,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 20:01:27,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:01:27,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-12 20:01:27,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:27,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:27,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 20:01:27,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 20:01:27,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:28,174 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:01:28,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:28,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:28,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:28,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:28,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:28,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:01:28,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:28,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:28,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:28,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:28,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:28,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465874396] [2020-10-12 20:01:28,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:28,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:01:28,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475893346] [2020-10-12 20:01:28,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:01:28,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:01:28,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:01:28,222 INFO L87 Difference]: Start difference. First operand 187 states and 276 transitions. Second operand 4 states. [2020-10-12 20:01:28,354 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 20:01:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:28,727 INFO L93 Difference]: Finished difference Result 467 states and 714 transitions. [2020-10-12 20:01:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:01:28,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-12 20:01:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:28,730 INFO L225 Difference]: With dead ends: 467 [2020-10-12 20:01:28,730 INFO L226 Difference]: Without dead ends: 311 [2020-10-12 20:01:28,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:01:28,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-12 20:01:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2020-10-12 20:01:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-12 20:01:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 466 transitions. [2020-10-12 20:01:28,772 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 466 transitions. Word has length 54 [2020-10-12 20:01:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:28,775 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 466 transitions. [2020-10-12 20:01:28,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:01:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 466 transitions. [2020-10-12 20:01:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 20:01:28,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:28,779 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] [2020-10-12 20:01:28,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:01:28,779 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1582724613, now seen corresponding path program 1 times [2020-10-12 20:01:28,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:28,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454662905] [2020-10-12 20:01:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:28,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:28,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:28,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:29,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:29,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 20:01:29,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:01:29,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-12 20:01:29,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:29,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:29,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 20:01:29,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 20:01:29,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:29,280 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:01:29,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:29,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:29,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:29,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:29,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:01:29,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:29,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:29,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:29,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454662905] [2020-10-12 20:01:29,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:29,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:01:29,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115981320] [2020-10-12 20:01:29,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:01:29,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:29,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:01:29,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:01:29,323 INFO L87 Difference]: Start difference. First operand 309 states and 466 transitions. Second operand 4 states. [2020-10-12 20:01:29,501 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 20:01:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:30,126 INFO L93 Difference]: Finished difference Result 801 states and 1232 transitions. [2020-10-12 20:01:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:01:30,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-12 20:01:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:30,135 INFO L225 Difference]: With dead ends: 801 [2020-10-12 20:01:30,135 INFO L226 Difference]: Without dead ends: 523 [2020-10-12 20:01:30,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:01:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-12 20:01:30,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 521. [2020-10-12 20:01:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-12 20:01:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 792 transitions. [2020-10-12 20:01:30,185 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 792 transitions. Word has length 55 [2020-10-12 20:01:30,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:30,185 INFO L479 AbstractCegarLoop]: Abstraction has 521 states and 792 transitions. [2020-10-12 20:01:30,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:01:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 792 transitions. [2020-10-12 20:01:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 20:01:30,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:30,188 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] [2020-10-12 20:01:30,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:01:30,188 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:30,189 INFO L82 PathProgramCache]: Analyzing trace with hash 51264791, now seen corresponding path program 1 times [2020-10-12 20:01:30,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:30,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911903202] [2020-10-12 20:01:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:30,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:30,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:30,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:30,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 20:01:30,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:01:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-12 20:01:30,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:01:30,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 20:01:30,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:30,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:30,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:30,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:30,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:30,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:30,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:01:30,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:30,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:30,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:30,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:30,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:30,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911903202] [2020-10-12 20:01:30,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:30,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:01:30,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809419026] [2020-10-12 20:01:30,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:01:30,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:30,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:01:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:01:30,575 INFO L87 Difference]: Start difference. First operand 521 states and 792 transitions. Second operand 4 states. [2020-10-12 20:01:30,717 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 20:01:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:31,117 INFO L93 Difference]: Finished difference Result 1445 states and 2218 transitions. [2020-10-12 20:01:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:01:31,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-12 20:01:31,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:31,123 INFO L225 Difference]: With dead ends: 1445 [2020-10-12 20:01:31,124 INFO L226 Difference]: Without dead ends: 955 [2020-10-12 20:01:31,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:01:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-10-12 20:01:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 945. [2020-10-12 20:01:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2020-10-12 20:01:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1432 transitions. [2020-10-12 20:01:31,181 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1432 transitions. Word has length 56 [2020-10-12 20:01:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:31,181 INFO L479 AbstractCegarLoop]: Abstraction has 945 states and 1432 transitions. [2020-10-12 20:01:31,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:01:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1432 transitions. [2020-10-12 20:01:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 20:01:31,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:31,183 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, 1] [2020-10-12 20:01:31,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:01:31,183 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:31,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1625536084, now seen corresponding path program 1 times [2020-10-12 20:01:31,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:31,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377963329] [2020-10-12 20:01:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:31,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:31,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:31,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:31,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:31,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 20:01:31,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:01:31,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 704 [2020-10-12 20:01:31,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:31,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:01:31,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:01:31,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 20:01:31,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:32,169 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:01:32,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:32,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:32,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:32,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:32,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:32,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 20:01:32,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:32,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:32,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:32,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:01:32,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:32,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377963329] [2020-10-12 20:01:32,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:32,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:01:32,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674237953] [2020-10-12 20:01:32,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:01:32,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:32,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:01:32,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:01:32,219 INFO L87 Difference]: Start difference. First operand 945 states and 1432 transitions. Second operand 7 states. [2020-10-12 20:01:32,372 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 20:01:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:33,177 INFO L93 Difference]: Finished difference Result 2911 states and 4404 transitions. [2020-10-12 20:01:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:01:33,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-12 20:01:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:33,189 INFO L225 Difference]: With dead ends: 2911 [2020-10-12 20:01:33,189 INFO L226 Difference]: Without dead ends: 1997 [2020-10-12 20:01:33,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:01:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2020-10-12 20:01:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 970. [2020-10-12 20:01:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-10-12 20:01:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1468 transitions. [2020-10-12 20:01:33,283 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1468 transitions. Word has length 57 [2020-10-12 20:01:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:33,285 INFO L479 AbstractCegarLoop]: Abstraction has 970 states and 1468 transitions. [2020-10-12 20:01:33,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:01:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1468 transitions. [2020-10-12 20:01:33,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 20:01:33,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:33,286 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, 1, 1] [2020-10-12 20:01:33,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:01:33,287 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:33,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1504126601, now seen corresponding path program 1 times [2020-10-12 20:01:33,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:33,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550204001] [2020-10-12 20:01:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:33,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:33,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:33,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:33,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:33,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 20:01:33,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:01:33,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-12 20:01:33,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:01:33,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:01:33,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 20:01:33,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:33,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:33,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:33,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:33,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:33,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:33,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:01:33,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:33,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:33,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:33,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:33,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550204001] [2020-10-12 20:01:33,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:33,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:01:33,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302290974] [2020-10-12 20:01:33,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:01:33,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:01:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:01:33,981 INFO L87 Difference]: Start difference. First operand 970 states and 1468 transitions. Second operand 5 states. [2020-10-12 20:01:34,136 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:35,032 INFO L93 Difference]: Finished difference Result 1944 states and 2975 transitions. [2020-10-12 20:01:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:01:35,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-12 20:01:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:35,043 INFO L225 Difference]: With dead ends: 1944 [2020-10-12 20:01:35,044 INFO L226 Difference]: Without dead ends: 1454 [2020-10-12 20:01:35,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:01:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2020-10-12 20:01:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1442. [2020-10-12 20:01:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-10-12 20:01:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2188 transitions. [2020-10-12 20:01:35,168 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2188 transitions. Word has length 58 [2020-10-12 20:01:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:35,168 INFO L479 AbstractCegarLoop]: Abstraction has 1442 states and 2188 transitions. [2020-10-12 20:01:35,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:01:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2188 transitions. [2020-10-12 20:01:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 20:01:35,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:35,169 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, 1, 1, 1] [2020-10-12 20:01:35,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:01:35,170 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:35,170 INFO L82 PathProgramCache]: Analyzing trace with hash 781497477, now seen corresponding path program 1 times [2020-10-12 20:01:35,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:35,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392870106] [2020-10-12 20:01:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:35,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:35,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:35,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:35,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:36,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:37,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:37,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 20:01:37,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:01:37,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2738 [2020-10-12 20:01:37,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:01:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 20:01:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 20:01:37,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:38,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:38,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:38,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:38,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:38,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:38,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:01:38,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:38,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:38,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:38,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:38,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:38,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392870106] [2020-10-12 20:01:38,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:38,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:01:38,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504024926] [2020-10-12 20:01:38,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:01:38,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:38,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:01:38,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:01:38,119 INFO L87 Difference]: Start difference. First operand 1442 states and 2188 transitions. Second operand 7 states. [2020-10-12 20:01:38,278 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:39,368 INFO L93 Difference]: Finished difference Result 6024 states and 9279 transitions. [2020-10-12 20:01:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 20:01:39,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-12 20:01:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:39,396 INFO L225 Difference]: With dead ends: 6024 [2020-10-12 20:01:39,396 INFO L226 Difference]: Without dead ends: 5322 [2020-10-12 20:01:39,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 20:01:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5322 states. [2020-10-12 20:01:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5322 to 2542. [2020-10-12 20:01:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2542 states. [2020-10-12 20:01:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 3880 transitions. [2020-10-12 20:01:39,662 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 3880 transitions. Word has length 59 [2020-10-12 20:01:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:39,663 INFO L479 AbstractCegarLoop]: Abstraction has 2542 states and 3880 transitions. [2020-10-12 20:01:39,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:01:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 3880 transitions. [2020-10-12 20:01:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 20:01:39,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:39,666 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, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:39,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:01:39,666 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:39,667 INFO L82 PathProgramCache]: Analyzing trace with hash -634611067, now seen corresponding path program 1 times [2020-10-12 20:01:39,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:39,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859794601] [2020-10-12 20:01:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:39,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:39,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:39,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:39,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:40,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:43,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:43,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 20:01:43,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:01:43,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3447 [2020-10-12 20:01:43,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:43,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:01:43,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:01:43,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 20:01:43,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:43,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:43,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:43,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:43,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:43,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:43,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:01:43,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:43,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:43,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:43,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:01:43,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:43,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859794601] [2020-10-12 20:01:43,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:01:43,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 20:01:43,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590150950] [2020-10-12 20:01:43,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:01:43,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:43,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:01:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:01:43,419 INFO L87 Difference]: Start difference. First operand 2542 states and 3880 transitions. Second operand 8 states. [2020-10-12 20:01:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:45,433 INFO L93 Difference]: Finished difference Result 14432 states and 21784 transitions. [2020-10-12 20:01:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:01:45,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-12 20:01:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:45,488 INFO L225 Difference]: With dead ends: 14432 [2020-10-12 20:01:45,489 INFO L226 Difference]: Without dead ends: 11940 [2020-10-12 20:01:45,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:01:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11940 states. [2020-10-12 20:01:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11940 to 5353. [2020-10-12 20:01:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5353 states. [2020-10-12 20:01:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5353 states to 5353 states and 8008 transitions. [2020-10-12 20:01:46,026 INFO L78 Accepts]: Start accepts. Automaton has 5353 states and 8008 transitions. Word has length 78 [2020-10-12 20:01:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:46,027 INFO L479 AbstractCegarLoop]: Abstraction has 5353 states and 8008 transitions. [2020-10-12 20:01:46,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:01:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5353 states and 8008 transitions. [2020-10-12 20:01:46,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 20:01:46,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:46,031 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:46,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:01:46,031 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:46,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:46,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2113061916, now seen corresponding path program 1 times [2020-10-12 20:01:46,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:46,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156803797] [2020-10-12 20:01:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:46,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:46,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:46,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:46,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:46,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:48,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:51,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:51,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 20:01:51,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:01:51,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 20:01:51,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:51,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:01:51,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:01:51,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 20:01:51,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:51,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:51,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:51,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:51,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:51,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:51,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:01:51,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:51,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:51,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:51,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:01:51,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:51,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156803797] [2020-10-12 20:01:51,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:01:51,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 20:01:51,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188743756] [2020-10-12 20:01:51,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:01:51,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:51,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:01:51,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:01:51,270 INFO L87 Difference]: Start difference. First operand 5353 states and 8008 transitions. Second operand 8 states. [2020-10-12 20:01:51,417 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-12 20:01:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:53,370 INFO L93 Difference]: Finished difference Result 23609 states and 35196 transitions. [2020-10-12 20:01:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:01:53,370 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-12 20:01:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:53,434 INFO L225 Difference]: With dead ends: 23609 [2020-10-12 20:01:53,434 INFO L226 Difference]: Without dead ends: 18287 [2020-10-12 20:01:53,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 20:01:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18287 states. [2020-10-12 20:01:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18287 to 8717. [2020-10-12 20:01:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8717 states. [2020-10-12 20:01:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8717 states to 8717 states and 12942 transitions. [2020-10-12 20:01:54,255 INFO L78 Accepts]: Start accepts. Automaton has 8717 states and 12942 transitions. Word has length 78 [2020-10-12 20:01:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:54,255 INFO L479 AbstractCegarLoop]: Abstraction has 8717 states and 12942 transitions. [2020-10-12 20:01:54,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:01:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8717 states and 12942 transitions. [2020-10-12 20:01:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 20:01:54,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:54,261 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:54,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:01:54,261 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:54,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:54,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1695069549, now seen corresponding path program 1 times [2020-10-12 20:01:54,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:54,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568506795] [2020-10-12 20:01:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:54,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:54,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:54,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:54,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:55,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:55,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:59,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:59,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 20:01:59,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:01:59,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 20:01:59,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:01:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:01:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 20:01:59,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:59,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:59,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:59,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:59,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:59,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 20:01:59,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:59,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:59,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:59,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:01:59,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:59,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568506795] [2020-10-12 20:01:59,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:01:59,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 20:01:59,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899612774] [2020-10-12 20:01:59,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:01:59,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:59,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:01:59,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:01:59,603 INFO L87 Difference]: Start difference. First operand 8717 states and 12942 transitions. Second operand 8 states. [2020-10-12 20:01:59,767 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 20:02:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:02,513 INFO L93 Difference]: Finished difference Result 32481 states and 48026 transitions. [2020-10-12 20:02:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:02:02,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-12 20:02:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:02,576 INFO L225 Difference]: With dead ends: 32481 [2020-10-12 20:02:02,576 INFO L226 Difference]: Without dead ends: 23795 [2020-10-12 20:02:02,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:02:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23795 states. [2020-10-12 20:02:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23795 to 12477. [2020-10-12 20:02:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12477 states. [2020-10-12 20:02:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12477 states to 12477 states and 18184 transitions. [2020-10-12 20:02:03,736 INFO L78 Accepts]: Start accepts. Automaton has 12477 states and 18184 transitions. Word has length 78 [2020-10-12 20:02:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:03,736 INFO L479 AbstractCegarLoop]: Abstraction has 12477 states and 18184 transitions. [2020-10-12 20:02:03,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:02:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 12477 states and 18184 transitions. [2020-10-12 20:02:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 20:02:03,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:03,745 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:03,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:02:03,745 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:03,746 INFO L82 PathProgramCache]: Analyzing trace with hash 288087830, now seen corresponding path program 1 times [2020-10-12 20:02:03,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:03,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321748082] [2020-10-12 20:02:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:03,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:03,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:03,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:03,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:04,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:04,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:04,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:08,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:08,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:08,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:08,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:08,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:08,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 20:02:08,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 20:02:08,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 20:02:08,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:08,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:02:08,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:02:08,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 20:02:08,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:08,992 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 25 [2020-10-12 20:02:09,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:09,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:09,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:09,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:09,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:09,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:02:09,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:09,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:02:09,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:09,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:02:09,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:09,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321748082] [2020-10-12 20:02:09,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:02:09,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 20:02:09,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202795940] [2020-10-12 20:02:09,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:02:09,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:09,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:02:09,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:02:09,184 INFO L87 Difference]: Start difference. First operand 12477 states and 18184 transitions. Second operand 12 states. [2020-10-12 20:02:09,334 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 20:02:11,468 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-10-12 20:02:21,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:21,894 INFO L93 Difference]: Finished difference Result 109903 states and 159792 transitions. [2020-10-12 20:02:21,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 20:02:21,894 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-10-12 20:02:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:22,116 INFO L225 Difference]: With dead ends: 109903 [2020-10-12 20:02:22,117 INFO L226 Difference]: Without dead ends: 97457 [2020-10-12 20:02:22,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=614, Invalid=2038, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 20:02:22,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97457 states. [2020-10-12 20:02:26,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97457 to 33407. [2020-10-12 20:02:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33407 states. [2020-10-12 20:02:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33407 states to 33407 states and 48608 transitions. [2020-10-12 20:02:26,343 INFO L78 Accepts]: Start accepts. Automaton has 33407 states and 48608 transitions. Word has length 80 [2020-10-12 20:02:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:26,343 INFO L479 AbstractCegarLoop]: Abstraction has 33407 states and 48608 transitions. [2020-10-12 20:02:26,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 20:02:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 33407 states and 48608 transitions. [2020-10-12 20:02:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:02:26,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:26,350 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:26,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:02:26,351 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:26,351 INFO L82 PathProgramCache]: Analyzing trace with hash -478015060, now seen corresponding path program 1 times [2020-10-12 20:02:26,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:26,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428939824] [2020-10-12 20:02:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:26,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:26,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:26,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:26,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:26,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:27,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:27,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:02:27,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:02:27,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1598 [2020-10-12 20:02:27,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:02:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:02:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 20:02:27,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:28,138 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:02:28,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:28,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:28,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:28,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:28,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:28,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:02:28,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:28,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:02:28,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:28,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:02:28,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:02:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:28,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428939824] [2020-10-12 20:02:28,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:02:28,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 20:02:28,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389149213] [2020-10-12 20:02:28,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:02:28,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:28,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:02:28,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:02:28,189 INFO L87 Difference]: Start difference. First operand 33407 states and 48608 transitions. Second operand 6 states. [2020-10-12 20:02:28,340 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 20:02:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:33,443 INFO L93 Difference]: Finished difference Result 58715 states and 85916 transitions. [2020-10-12 20:02:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:02:33,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-12 20:02:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:33,523 INFO L225 Difference]: With dead ends: 58715 [2020-10-12 20:02:33,523 INFO L226 Difference]: Without dead ends: 45953 [2020-10-12 20:02:33,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:02:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45953 states. [2020-10-12 20:02:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45953 to 45771. [2020-10-12 20:02:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45771 states. [2020-10-12 20:02:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45771 states to 45771 states and 66556 transitions. [2020-10-12 20:02:39,024 INFO L78 Accepts]: Start accepts. Automaton has 45771 states and 66556 transitions. Word has length 81 [2020-10-12 20:02:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:39,025 INFO L479 AbstractCegarLoop]: Abstraction has 45771 states and 66556 transitions. [2020-10-12 20:02:39,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:02:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 45771 states and 66556 transitions. [2020-10-12 20:02:39,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:02:39,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:39,033 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:39,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:02:39,034 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:39,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:39,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1179332215, now seen corresponding path program 1 times [2020-10-12 20:02:39,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:39,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105634032] [2020-10-12 20:02:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:39,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:39,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:39,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:39,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:39,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:39,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:40,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:40,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:44,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:44,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:02:44,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 20:02:44,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 20:02:44,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:02:44,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:02:44,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 20:02:44,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:44,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:44,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:44,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:44,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:44,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:44,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:02:44,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:44,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:02:44,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:44,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:02:44,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:44,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105634032] [2020-10-12 20:02:44,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:02:44,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 20:02:44,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262555682] [2020-10-12 20:02:44,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:02:44,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:02:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:02:44,342 INFO L87 Difference]: Start difference. First operand 45771 states and 66556 transitions. Second operand 12 states. [2020-10-12 20:02:44,499 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-12 20:03:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:26,012 INFO L93 Difference]: Finished difference Result 378335 states and 544591 transitions. [2020-10-12 20:03:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 20:03:26,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-12 20:03:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:26,605 INFO L225 Difference]: With dead ends: 378335 [2020-10-12 20:03:26,605 INFO L226 Difference]: Without dead ends: 354089 [2020-10-12 20:03:26,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 20:03:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354089 states. [2020-10-12 20:03:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354089 to 145332. [2020-10-12 20:03:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145332 states. [2020-10-12 20:03:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145332 states to 145332 states and 211444 transitions. [2020-10-12 20:03:48,086 INFO L78 Accepts]: Start accepts. Automaton has 145332 states and 211444 transitions. Word has length 81 [2020-10-12 20:03:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:48,087 INFO L479 AbstractCegarLoop]: Abstraction has 145332 states and 211444 transitions. [2020-10-12 20:03:48,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 20:03:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 145332 states and 211444 transitions. [2020-10-12 20:03:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:03:48,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:48,104 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:48,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:03:48,104 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:48,105 INFO L82 PathProgramCache]: Analyzing trace with hash -154897596, now seen corresponding path program 1 times [2020-10-12 20:03:48,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:48,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314800937] [2020-10-12 20:03:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:48,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:48,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:48,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:48,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:48,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:48,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:52,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:52,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:03:52,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:03:52,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3945 [2020-10-12 20:03:52,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:03:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:03:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 20:03:52,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:52,376 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:03:52,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:52,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:52,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:52,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:52,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:52,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:03:52,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:52,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:52,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:52,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:52,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:52,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314800937] [2020-10-12 20:03:52,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:03:52,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 20:03:52,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110497543] [2020-10-12 20:03:52,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:03:52,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:52,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:03:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:03:52,405 INFO L87 Difference]: Start difference. First operand 145332 states and 211444 transitions. Second operand 10 states. [2020-10-12 20:03:52,554 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 20:04:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:47,454 INFO L93 Difference]: Finished difference Result 481632 states and 694508 transitions. [2020-10-12 20:04:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 20:04:47,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-12 20:04:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:48,049 INFO L225 Difference]: With dead ends: 481632 [2020-10-12 20:04:48,049 INFO L226 Difference]: Without dead ends: 403992 [2020-10-12 20:04:48,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-12 20:04:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403992 states.