/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/array-fpi/res1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:11:48,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:11:48,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:11:48,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:11:48,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:11:48,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:11:48,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:11:48,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:11:48,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:11:48,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:11:48,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:11:48,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:11:48,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:11:48,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:11:48,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:11:48,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:11:48,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:11:48,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:11:48,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:11:48,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:11:48,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:11:48,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:11:48,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:11:48,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:11:48,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:11:48,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:11:48,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:11:48,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:11:48,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:11:48,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:11:48,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:11:48,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:11:48,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:11:48,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:11:48,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:11:48,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:11:48,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:11:48,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:11:48,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:11:48,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:11:48,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:11:48,694 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 10:11:48,743 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:11:48,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:11:48,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:11:48,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:11:48,747 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:11:48,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:11:48,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:11:48,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:11:48,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:11:48,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:11:48,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:11:48,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:11:48,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:11:48,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:11:48,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:11:48,749 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:11:48,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:11:48,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:11:48,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:11:48,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:11:48,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:11:48,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:11:48,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:11:48,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:11:48,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:11:48,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:11:48,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:11:48,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:11:48,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:11:48,753 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 10:11:49,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:11:49,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:11:49,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:11:49,071 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:11:49,071 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:11:49,072 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1.c [2020-10-12 10:11:49,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e234e64c/7df4c19699154bcc8acb1f325ae3ce4d/FLAG808297a3b [2020-10-12 10:11:49,570 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:11:49,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1.c [2020-10-12 10:11:49,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e234e64c/7df4c19699154bcc8acb1f325ae3ce4d/FLAG808297a3b [2020-10-12 10:11:49,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e234e64c/7df4c19699154bcc8acb1f325ae3ce4d [2020-10-12 10:11:49,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:11:49,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:11:49,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:49,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:11:49,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:11:49,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2018f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49, skipping insertion in model container [2020-10-12 10:11:49,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:11:50,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:11:50,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:50,235 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:11:50,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:50,358 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:11:50,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:50 WrapperNode [2020-10-12 10:11:50,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:50,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:11:50,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:11:50,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:11:50,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:50" (1/1) ... [2020-10-12 10:11:50,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:50" (1/1) ... [2020-10-12 10:11:50,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:50" (1/1) ... [2020-10-12 10:11:50,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:50" (1/1) ... [2020-10-12 10:11:50,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:50" (1/1) ... [2020-10-12 10:11:50,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:50" (1/1) ... [2020-10-12 10:11:50,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:50" (1/1) ... [2020-10-12 10:11:50,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:11:50,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:11:50,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:11:50,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:11:50,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:50" (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 10:11:50,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:11:50,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:11:50,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:11:50,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:11:50,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:11:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:11:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:11:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:11:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:11:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:11:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:11:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:11:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:11:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:11:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:11:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:11:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:11:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:11:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:11:50,794 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:11:50,794 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 10:11:50,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:50 BoogieIcfgContainer [2020-10-12 10:11:50,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:11:50,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:11:50,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:11:50,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:11:50,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:11:49" (1/3) ... [2020-10-12 10:11:50,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1f75b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:50, skipping insertion in model container [2020-10-12 10:11:50,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:50" (2/3) ... [2020-10-12 10:11:50,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1f75b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:50, skipping insertion in model container [2020-10-12 10:11:50,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:50" (3/3) ... [2020-10-12 10:11:50,808 INFO L109 eAbstractionObserver]: Analyzing ICFG res1.c [2020-10-12 10:11:50,819 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:11:50,825 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:11:50,840 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:11:50,865 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:11:50,865 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:11:50,865 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:11:50,865 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:11:50,866 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:11:50,866 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:11:50,866 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:11:50,866 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:11:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-12 10:11:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 10:11:50,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:50,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:50,894 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1562148239, now seen corresponding path program 1 times [2020-10-12 10:11:50,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:50,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634485944] [2020-10-12 10:11:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:51,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:52,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 10:11:52,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:11:52,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-12 10:11:52,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:52,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:11:52,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:11:52,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:11:52,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:11:52,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:52,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:52,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:52,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:11:52,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:52,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:52,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:52,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:52,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:11:52,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:11:52,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:52,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:11:52,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:52,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:11:52,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:52,356 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 10:11:52,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634485944] [2020-10-12 10:11:52,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:11:52,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 10:11:52,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920289354] [2020-10-12 10:11:52,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:11:52,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:52,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:11:52,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:11:52,382 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 8 states. [2020-10-12 10:11:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:52,687 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2020-10-12 10:11:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:11:52,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-12 10:11:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:52,699 INFO L225 Difference]: With dead ends: 82 [2020-10-12 10:11:52,700 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:11:52,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:11:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:11:52,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 10:11:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:11:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-12 10:11:52,753 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-12 10:11:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:52,753 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-12 10:11:52,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:11:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-12 10:11:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:11:52,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:52,755 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] [2020-10-12 10:11:52,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:11:52,756 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1783482005, now seen corresponding path program 1 times [2020-10-12 10:11:52,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:52,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568447408] [2020-10-12 10:11:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:52,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:53,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:11:53,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:11:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-12 10:11:53,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:11:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:11:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:11:53,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 10:11:53,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:53,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:53,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:53,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:53,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:53,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:53,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:53,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:53,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:53,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:53,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:53,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:53,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:53,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:53,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:53,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:53,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:53,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568447408] [2020-10-12 10:11:53,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:11:53,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:11:53,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915462603] [2020-10-12 10:11:53,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:11:53,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:53,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:11:53,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:11:53,591 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-10-12 10:11:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:53,778 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-10-12 10:11:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:11:53,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-12 10:11:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:53,780 INFO L225 Difference]: With dead ends: 68 [2020-10-12 10:11:53,780 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 10:11:53,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:11:53,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 10:11:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-12 10:11:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:11:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-12 10:11:53,790 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 27 [2020-10-12 10:11:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:53,791 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-12 10:11:53,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:11:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-12 10:11:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:11:53,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:53,792 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] [2020-10-12 10:11:53,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:11:53,793 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:53,793 INFO L82 PathProgramCache]: Analyzing trace with hash -588182059, now seen corresponding path program 1 times [2020-10-12 10:11:53,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:53,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568236317] [2020-10-12 10:11:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:53,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:54,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:11:54,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:11:54,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-12 10:11:54,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:54,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:11:54,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:54,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:11:54,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:54,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:54,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:54,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:54,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:54,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:11:54,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:54,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:54,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:54,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:54,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:54,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:54,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:54,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:54,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:54,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:54,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:54,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:54,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:54,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:54,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:54,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568236317] [2020-10-12 10:11:54,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:54,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:11:54,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025402805] [2020-10-12 10:11:54,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:11:54,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:54,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:11:54,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:11:54,863 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-10-12 10:11:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:55,147 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-12 10:11:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:11:55,149 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 10:11:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:55,151 INFO L225 Difference]: With dead ends: 45 [2020-10-12 10:11:55,151 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 10:11:55,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:11:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 10:11:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-12 10:11:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 10:11:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-12 10:11:55,166 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-10-12 10:11:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:55,167 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-12 10:11:55,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:11:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-12 10:11:55,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 10:11:55,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:55,169 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] [2020-10-12 10:11:55,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:11:55,170 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash -497039913, now seen corresponding path program 1 times [2020-10-12 10:11:55,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:55,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963548579] [2020-10-12 10:11:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:55,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:56,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 10:11:56,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:11:56,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-12 10:11:56,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:56,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:11:56,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:11:56,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:56,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:56,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:56,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:56,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:11:56,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:56,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:56,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:56,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:56,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:56,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:56,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:56,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:56,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:56,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963548579] [2020-10-12 10:11:56,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:56,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:11:56,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048634963] [2020-10-12 10:11:56,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:11:56,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:56,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:11:56,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:11:56,226 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-10-12 10:11:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:56,458 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-12 10:11:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:11:56,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-12 10:11:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:56,460 INFO L225 Difference]: With dead ends: 41 [2020-10-12 10:11:56,460 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 10:11:56,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:11:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 10:11:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 10:11:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 10:11:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-12 10:11:56,472 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-10-12 10:11:56,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:56,473 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-12 10:11:56,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:11:56,473 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-12 10:11:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:11:56,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:56,475 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] [2020-10-12 10:11:56,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:11:56,476 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:56,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1703711335, now seen corresponding path program 1 times [2020-10-12 10:11:56,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:56,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770931624] [2020-10-12 10:11:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:56,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:58,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:11:58,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:11:58,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1639 [2020-10-12 10:11:58,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:58,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:11:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:11:58,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:58,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:58,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:58,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:58,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:58,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:58,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:58,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:58,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:58,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:58,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:58,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:58,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:58,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:58,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:58,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:58,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:58,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:58,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:58,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:58,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:58,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770931624] [2020-10-12 10:11:58,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:58,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:11:58,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164918841] [2020-10-12 10:11:58,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:11:58,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:11:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:11:58,603 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 15 states. [2020-10-12 10:11:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:59,678 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-12 10:11:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:11:59,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-12 10:11:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:59,681 INFO L225 Difference]: With dead ends: 56 [2020-10-12 10:11:59,681 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 10:11:59,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:11:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 10:11:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-12 10:11:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:11:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-12 10:11:59,695 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-10-12 10:11:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:59,696 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-12 10:11:59,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:11:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-12 10:11:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:11:59,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:59,700 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] [2020-10-12 10:11:59,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:11:59,701 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:59,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1815337701, now seen corresponding path program 1 times [2020-10-12 10:11:59,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:59,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798993633] [2020-10-12 10:11:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:59,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:59,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:02,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 10:12:02,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:12:02,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2390 [2020-10-12 10:12:02,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:02,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:12:02,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:12:02,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:02,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:02,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:02,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:02,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:02,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:02,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:02,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:02,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:02,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:02,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:02,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:02,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:02,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:02,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798993633] [2020-10-12 10:12:02,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:02,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:12:02,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191807048] [2020-10-12 10:12:02,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:12:02,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:02,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:12:02,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:12:02,859 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 19 states. [2020-10-12 10:12:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:03,925 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-12 10:12:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:12:03,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2020-10-12 10:12:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:03,926 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:12:03,927 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 10:12:03,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:12:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 10:12:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-10-12 10:12:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 10:12:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-12 10:12:03,936 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 33 [2020-10-12 10:12:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:03,936 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-12 10:12:03,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:12:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-12 10:12:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:12:03,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:03,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:03,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:12:03,938 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:03,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1673777957, now seen corresponding path program 2 times [2020-10-12 10:12:03,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:03,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133814860] [2020-10-12 10:12:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:03,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:04,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:04,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:04,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:04,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:04,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:06,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 10:12:06,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:12:06,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2993 [2020-10-12 10:12:06,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:06,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:12:06,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:06,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:12:06,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:07,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:07,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:07,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:07,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:07,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:07,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:07,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:07,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:07,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:07,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:07,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:07,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:07,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:07,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:07,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:07,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:07,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:07,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133814860] [2020-10-12 10:12:07,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:07,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:12:07,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57344145] [2020-10-12 10:12:07,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:12:07,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:07,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:12:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:12:07,500 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 17 states. [2020-10-12 10:12:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:08,372 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-10-12 10:12:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:12:08,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-12 10:12:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:08,376 INFO L225 Difference]: With dead ends: 79 [2020-10-12 10:12:08,377 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 10:12:08,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:12:08,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 10:12:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-12 10:12:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 10:12:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-10-12 10:12:08,391 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 33 [2020-10-12 10:12:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:08,391 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-10-12 10:12:08,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:12:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-10-12 10:12:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:12:08,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:08,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:08,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:12:08,394 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:08,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1714093027, now seen corresponding path program 2 times [2020-10-12 10:12:08,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:08,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122932636] [2020-10-12 10:12:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:08,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:10,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:10,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 10:12:10,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:12:10,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2119 [2020-10-12 10:12:10,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:10,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:12:10,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 10:12:10,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:12:10,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:10,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:10,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:10,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:10,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:10,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:10,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:10,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:10,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:10,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:10,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:10,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:10,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:10,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:10,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:12:10,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122932636] [2020-10-12 10:12:10,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:10,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:12:10,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500530119] [2020-10-12 10:12:10,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:12:10,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:12:10,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:12:10,601 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 8 states. [2020-10-12 10:12:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:10,818 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2020-10-12 10:12:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:12:10,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-12 10:12:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:10,821 INFO L225 Difference]: With dead ends: 98 [2020-10-12 10:12:10,822 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 10:12:10,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:12:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 10:12:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-12 10:12:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:12:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-12 10:12:10,840 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 35 [2020-10-12 10:12:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:10,841 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-12 10:12:10,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:12:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-12 10:12:10,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:12:10,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:10,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:10,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:12:10,842 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:10,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1542892381, now seen corresponding path program 3 times [2020-10-12 10:12:10,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:10,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2426739] [2020-10-12 10:12:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:10,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:10,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:10,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:15,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 10:12:15,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:12:15,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4437 [2020-10-12 10:12:15,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:15,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:12:15,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:15,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:12:15,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:15,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:15,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:15,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:15,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:15,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:15,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:15,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:15,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:15,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:15,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:15,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:15,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:15,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:15,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:15,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:15,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:15,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:15,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:15,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:15,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:15,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2426739] [2020-10-12 10:12:15,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:15,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:12:15,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413384111] [2020-10-12 10:12:15,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:12:15,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:15,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:12:15,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:12:15,794 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 20 states. [2020-10-12 10:12:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:16,623 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-10-12 10:12:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:12:16,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-10-12 10:12:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:16,624 INFO L225 Difference]: With dead ends: 54 [2020-10-12 10:12:16,624 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 10:12:16,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:12:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 10:12:16,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-12 10:12:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 10:12:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-12 10:12:16,631 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 35 [2020-10-12 10:12:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:16,632 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-12 10:12:16,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:12:16,632 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-12 10:12:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:12:16,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:16,633 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 10:12:16,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:12:16,633 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1557178081, now seen corresponding path program 3 times [2020-10-12 10:12:16,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:16,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497347650] [2020-10-12 10:12:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:16,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:20,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:20,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:12:20,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:12:20,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3462 [2020-10-12 10:12:20,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:20,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:12:20,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:20,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:12:20,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:21,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:21,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:21,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:21,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:21,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:21,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:21,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:21,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:21,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:21,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:21,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:21,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:21,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:21,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:21,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:21,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:21,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:21,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:21,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:21,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497347650] [2020-10-12 10:12:21,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:21,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:12:21,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674605401] [2020-10-12 10:12:21,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:12:21,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:21,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:12:21,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:12:21,093 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 21 states. [2020-10-12 10:12:21,881 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-10-12 10:12:22,060 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-10-12 10:12:22,288 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-10-12 10:12:22,441 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2020-10-12 10:12:22,763 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2020-10-12 10:12:22,964 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2020-10-12 10:12:23,134 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-12 10:12:23,389 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-12 10:12:23,637 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-12 10:12:24,120 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-12 10:12:24,434 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-12 10:12:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:24,708 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-12 10:12:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:12:24,708 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-12 10:12:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:24,710 INFO L225 Difference]: With dead ends: 60 [2020-10-12 10:12:24,710 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 10:12:24,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=392, Invalid=1500, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:12:24,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 10:12:24,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-12 10:12:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:12:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-12 10:12:24,729 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 37 [2020-10-12 10:12:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:24,730 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-12 10:12:24,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:12:24,730 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-12 10:12:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:12:24,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:24,731 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 10:12:24,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:12:24,734 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1564165921, now seen corresponding path program 4 times [2020-10-12 10:12:24,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:24,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553445081] [2020-10-12 10:12:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:24,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:29,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:12:29,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 10:12:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-12 10:12:29,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:12:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:12:29,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:31,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:31,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:31,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:31,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:31,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:31,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:31,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:31,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:31,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:31,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:31,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:31,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:31,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:31,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:31,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:31,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:31,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:31,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:31,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:31,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:31,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553445081] [2020-10-12 10:12:31,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:31,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:12:31,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709644494] [2020-10-12 10:12:31,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:12:31,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:31,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:12:31,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:12:31,302 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 24 states. [2020-10-12 10:12:32,340 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-12 10:12:32,538 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-10-12 10:12:32,699 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-12 10:12:32,914 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2020-10-12 10:12:33,081 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-12 10:12:33,258 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2020-10-12 10:12:33,533 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 54 [2020-10-12 10:12:33,864 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-12 10:12:34,032 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 10:12:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:34,574 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-12 10:12:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:12:34,575 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 39 [2020-10-12 10:12:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:34,576 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:12:34,576 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 10:12:34,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:12:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 10:12:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-12 10:12:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 10:12:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-12 10:12:34,587 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 39 [2020-10-12 10:12:34,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:34,587 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-12 10:12:34,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:12:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-12 10:12:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:12:34,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:34,588 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:34,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:12:34,588 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1705725665, now seen corresponding path program 4 times [2020-10-12 10:12:34,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:34,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366598189] [2020-10-12 10:12:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:34,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:34,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:34,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:34,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:34,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:34,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:34,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:34,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:38,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:38,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:39,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:39,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:39,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:39,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:12:39,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:12:39,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 10:12:39,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:39,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:12:39,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:39,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:12:39,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:40,037 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-12 10:12:40,289 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-12 10:12:40,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:40,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:40,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:40,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:40,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:40,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:40,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:40,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:40,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:40,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:40,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:40,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:40,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:40,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:40,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:40,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:40,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:40,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366598189] [2020-10-12 10:12:40,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:40,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:12:40,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798983796] [2020-10-12 10:12:40,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:12:40,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:40,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:12:40,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:12:40,931 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 23 states. [2020-10-12 10:12:41,393 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-12 10:12:41,713 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 10:12:41,865 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-12 10:12:42,016 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-12 10:12:42,170 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-12 10:12:42,315 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-12 10:12:42,449 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-12 10:12:42,629 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-12 10:12:42,767 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-10-12 10:12:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:43,844 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-12 10:12:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:12:43,845 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-10-12 10:12:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:43,846 INFO L225 Difference]: With dead ends: 64 [2020-10-12 10:12:43,846 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:12:43,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=413, Invalid=1749, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:12:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:12:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-12 10:12:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 10:12:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-12 10:12:43,857 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 39 [2020-10-12 10:12:43,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:43,858 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-12 10:12:43,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:12:43,858 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-12 10:12:43,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 10:12:43,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:43,859 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 10:12:43,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:12:43,859 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1006388061, now seen corresponding path program 5 times [2020-10-12 10:12:43,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:43,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120143083] [2020-10-12 10:12:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:43,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:48,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 10:12:48,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-12 10:12:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:12:48,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:12:48,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:48,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:12:48,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:49,401 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-12 10:12:49,635 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-12 10:12:50,177 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-12 10:12:51,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:51,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:51,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:51,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:51,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:51,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:51,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:51,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:51,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:51,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:51,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:51,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:51,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:51,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:51,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:51,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:51,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:51,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:51,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:51,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:51,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:51,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:51,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120143083] [2020-10-12 10:12:51,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:51,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:12:51,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430357296] [2020-10-12 10:12:51,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:12:51,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:51,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:12:51,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:12:51,237 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 27 states. [2020-10-12 10:12:51,458 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-12 10:12:51,993 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-12 10:12:52,164 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-12 10:12:52,399 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-12 10:12:52,623 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-12 10:12:52,791 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-12 10:12:53,205 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-12 10:12:53,551 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 63 [2020-10-12 10:12:53,783 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2020-10-12 10:12:54,014 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-12 10:12:54,228 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-12 10:12:54,443 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2020-10-12 10:12:54,827 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-12 10:12:55,033 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-12 10:12:55,235 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-12 10:12:55,442 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-12 10:12:55,620 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-12 10:12:55,844 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 10:12:56,098 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-12 10:12:56,247 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-12 10:12:56,657 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-12 10:12:56,875 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-12 10:12:57,150 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-12 10:12:57,340 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-12 10:12:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:57,536 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-10-12 10:12:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:12:57,537 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 41 [2020-10-12 10:12:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:57,538 INFO L225 Difference]: With dead ends: 78 [2020-10-12 10:12:57,538 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 10:12:57,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=523, Invalid=2899, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 10:12:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 10:12:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2020-10-12 10:12:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 10:12:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-12 10:12:57,551 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 41 [2020-10-12 10:12:57,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:57,551 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-12 10:12:57,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:12:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-12 10:12:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 10:12:57,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:57,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:57,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:12:57,553 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:57,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1888539747, now seen corresponding path program 6 times [2020-10-12 10:12:57,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:57,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422270478] [2020-10-12 10:12:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:57,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:59,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:00,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:00,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:00,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:01,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:01,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:02,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:02,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:02,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:02,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 10:13:02,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:13:02,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:13:02,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:02,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:13:02,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:02,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:13:02,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:03,467 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-12 10:13:04,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:04,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:04,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:04,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:04,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:04,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:04,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:04,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:04,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:04,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:04,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:04,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:04,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:04,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:04,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:04,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:04,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:04,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422270478] [2020-10-12 10:13:04,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:04,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:13:04,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231230242] [2020-10-12 10:13:04,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:13:04,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:13:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:13:04,163 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 25 states. [2020-10-12 10:13:05,214 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-12 10:13:05,578 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-12 10:13:05,772 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-12 10:13:06,008 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-12 10:13:06,221 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-12 10:13:07,013 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-12 10:13:07,327 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-12 10:13:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:07,496 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2020-10-12 10:13:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:13:07,497 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-10-12 10:13:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:07,498 INFO L225 Difference]: With dead ends: 125 [2020-10-12 10:13:07,498 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 10:13:07,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=329, Invalid=1927, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:13:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 10:13:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2020-10-12 10:13:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 10:13:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-10-12 10:13:07,514 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 41 [2020-10-12 10:13:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:07,515 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-10-12 10:13:07,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:13:07,515 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-10-12 10:13:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 10:13:07,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:07,516 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-12 10:13:07,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:13:07,516 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1702569563, now seen corresponding path program 7 times [2020-10-12 10:13:07,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:07,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268128939] [2020-10-12 10:13:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:07,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:07,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:10,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 10:13:10,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:13:10,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2508 [2020-10-12 10:13:10,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:10,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:13:10,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 10:13:10,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:13:10,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:10,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:10,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:10,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:10,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:10,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:10,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:10,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:10,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:10,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:10,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:10,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:10,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:10,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:10,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 10:13:10,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268128939] [2020-10-12 10:13:10,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:10,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:13:10,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548210132] [2020-10-12 10:13:10,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:13:10,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:10,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:13:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:13:10,107 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 10 states. [2020-10-12 10:13:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:10,443 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-10-12 10:13:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:13:10,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-12 10:13:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:10,446 INFO L225 Difference]: With dead ends: 112 [2020-10-12 10:13:10,446 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 10:13:10,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:13:10,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 10:13:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-12 10:13:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 10:13:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-12 10:13:10,457 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 43 [2020-10-12 10:13:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:10,457 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-12 10:13:10,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:13:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-12 10:13:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 10:13:10,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:10,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:10,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:13:10,460 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:10,460 INFO L82 PathProgramCache]: Analyzing trace with hash 625360997, now seen corresponding path program 8 times [2020-10-12 10:13:10,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:10,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906056256] [2020-10-12 10:13:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:10,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:14,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:14,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:14,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:15,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 10:13:15,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 10:13:15,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:13:15,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:13:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:13:15,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:16,059 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-12 10:13:16,284 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-12 10:13:16,429 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-12 10:13:16,646 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2020-10-12 10:13:16,805 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-10-12 10:13:17,385 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-10-12 10:13:17,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:17,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:17,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:17,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:17,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:17,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:17,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:17,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:17,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:17,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:17,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:17,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:17,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:17,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:17,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:17,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:17,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:17,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906056256] [2020-10-12 10:13:17,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:17,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:13:17,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72047518] [2020-10-12 10:13:17,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:13:17,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:17,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:13:17,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:13:17,986 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 26 states. [2020-10-12 10:13:18,849 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 69 [2020-10-12 10:13:19,156 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 44 [2020-10-12 10:13:19,589 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2020-10-12 10:13:20,146 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 58 [2020-10-12 10:13:20,417 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2020-10-12 10:13:20,638 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-12 10:13:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:21,021 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-12 10:13:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:13:21,022 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2020-10-12 10:13:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:21,023 INFO L225 Difference]: With dead ends: 78 [2020-10-12 10:13:21,023 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 10:13:21,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:13:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 10:13:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-12 10:13:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 10:13:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-12 10:13:21,034 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 43 [2020-10-12 10:13:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:21,035 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-12 10:13:21,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:13:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-12 10:13:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 10:13:21,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:21,035 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:21,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:13:21,036 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:21,036 INFO L82 PathProgramCache]: Analyzing trace with hash 766920741, now seen corresponding path program 5 times [2020-10-12 10:13:21,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:21,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351567009] [2020-10-12 10:13:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:21,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:24,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:24,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:24,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:25,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:25,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:25,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:25,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:26,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:26,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 10:13:26,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 10:13:26,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:13:26,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:26,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:13:26,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:26,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:13:26,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:27,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:27,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:27,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:27,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:27,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:27,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:27,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:27,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:27,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:27,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:27,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:27,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:27,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:27,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:27,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:27,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:27,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:27,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:27,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351567009] [2020-10-12 10:13:27,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:27,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:13:27,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368684960] [2020-10-12 10:13:27,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:13:27,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:13:27,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:13:27,840 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 26 states. [2020-10-12 10:13:28,352 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 41 [2020-10-12 10:13:28,684 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-12 10:13:28,914 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2020-10-12 10:13:29,073 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 51 [2020-10-12 10:13:29,281 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-10-12 10:13:29,514 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 50 [2020-10-12 10:13:29,731 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 51 [2020-10-12 10:13:29,955 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-10-12 10:13:30,126 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2020-10-12 10:13:30,318 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 52 [2020-10-12 10:13:30,709 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-10-12 10:13:30,918 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-10-12 10:13:31,210 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-10-12 10:13:31,525 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-12 10:13:31,838 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-12 10:13:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:32,624 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2020-10-12 10:13:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:13:32,624 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2020-10-12 10:13:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:32,626 INFO L225 Difference]: With dead ends: 93 [2020-10-12 10:13:32,626 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 10:13:32,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=457, Invalid=2299, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:13:32,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 10:13:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-12 10:13:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 10:13:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2020-10-12 10:13:32,638 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 43 [2020-10-12 10:13:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:32,639 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2020-10-12 10:13:32,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:13:32,639 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2020-10-12 10:13:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 10:13:32,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:32,640 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:32,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:13:32,640 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:32,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1640139943, now seen corresponding path program 9 times [2020-10-12 10:13:32,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:32,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788899986] [2020-10-12 10:13:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:32,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:37,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:13:37,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:13:37,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:13:37,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:37,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:13:37,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:37,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:13:37,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:37,948 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-12 10:13:38,195 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-12 10:13:38,335 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-12 10:13:38,687 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 10:13:38,857 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-12 10:13:39,091 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-12 10:13:39,262 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-12 10:13:39,677 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2020-10-12 10:13:40,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:40,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:40,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:40,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:40,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:40,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:40,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:40,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:40,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:40,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:40,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:40,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:40,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:40,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:40,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:40,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:40,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:40,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:40,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:40,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788899986] [2020-10-12 10:13:40,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:40,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:13:40,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194572325] [2020-10-12 10:13:40,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:13:40,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:40,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:13:40,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:13:40,701 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 29 states. [2020-10-12 10:13:41,712 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-12 10:13:42,476 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-12 10:13:43,227 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-12 10:13:43,508 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2020-10-12 10:13:43,709 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-12 10:13:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:44,448 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2020-10-12 10:13:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:13:44,449 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 45 [2020-10-12 10:13:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:44,450 INFO L225 Difference]: With dead ends: 95 [2020-10-12 10:13:44,450 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 10:13:44,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=383, Invalid=2373, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:13:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 10:13:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-12 10:13:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 10:13:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-12 10:13:44,464 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 45 [2020-10-12 10:13:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:44,465 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-12 10:13:44,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:13:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-12 10:13:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 10:13:44,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:44,466 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:44,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:13:44,466 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1500994599, now seen corresponding path program 10 times [2020-10-12 10:13:44,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:44,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195901078] [2020-10-12 10:13:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:44,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:44,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:44,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:44,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:44,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:45,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:45,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:45,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:45,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:46,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:49,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:13:49,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:13:49,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:13:49,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:49,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:13:49,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:49,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:13:49,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:50,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:50,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:50,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:50,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:50,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:50,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:50,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:50,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:50,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:50,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:50,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:50,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:50,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:50,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:50,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:50,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:50,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:50,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:13:50,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195901078] [2020-10-12 10:13:50,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:50,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:13:50,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284489214] [2020-10-12 10:13:50,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:13:50,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:50,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:13:50,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:13:50,483 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 23 states. [2020-10-12 10:13:51,191 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-10-12 10:13:51,361 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-12 10:13:51,654 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-12 10:13:51,952 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-12 10:13:52,190 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-12 10:13:52,350 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-12 10:13:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:52,773 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-12 10:13:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:13:52,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-10-12 10:13:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:52,775 INFO L225 Difference]: With dead ends: 82 [2020-10-12 10:13:52,775 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 10:13:52,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:13:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 10:13:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-12 10:13:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 10:13:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-12 10:13:52,786 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 45 [2020-10-12 10:13:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:52,786 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-12 10:13:52,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:13:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-12 10:13:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 10:13:52,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:52,787 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-12 10:13:52,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:13:52,787 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1009796951, now seen corresponding path program 11 times [2020-10-12 10:13:52,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:52,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192146111] [2020-10-12 10:13:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:52,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:53,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:54,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:54,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:55,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:56,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:56,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:56,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:56,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:56,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:57,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 10:13:57,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:13:57,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:13:57,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:57,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:13:57,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:57,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:13:57,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:58,239 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-12 10:13:58,391 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-12 10:13:59,033 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-12 10:13:59,208 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-12 10:13:59,400 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-12 10:13:59,705 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-12 10:14:00,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:00,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:00,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:00,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:00,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:00,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:14:00,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:00,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:00,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:00,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:00,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:00,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:00,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:00,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:00,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:00,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:00,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:00,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:00,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:00,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192146111] [2020-10-12 10:14:00,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:00,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:14:00,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113090933] [2020-10-12 10:14:00,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:14:00,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:00,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:14:00,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:14:00,790 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 32 states. [2020-10-12 10:14:01,467 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-12 10:14:01,648 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-12 10:14:02,089 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 53 [2020-10-12 10:14:02,265 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2020-10-12 10:14:02,469 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-12 10:14:02,810 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2020-10-12 10:14:03,072 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-12 10:14:03,339 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-12 10:14:03,561 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-12 10:14:03,808 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-10-12 10:14:04,144 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 61 [2020-10-12 10:14:04,400 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2020-10-12 10:14:04,698 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 61 [2020-10-12 10:14:05,225 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 49 [2020-10-12 10:14:06,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:06,198 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2020-10-12 10:14:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:14:06,199 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 47 [2020-10-12 10:14:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:06,200 INFO L225 Difference]: With dead ends: 112 [2020-10-12 10:14:06,200 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 10:14:06,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=509, Invalid=2797, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 10:14:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 10:14:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2020-10-12 10:14:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 10:14:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-10-12 10:14:06,219 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 47 [2020-10-12 10:14:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:06,219 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-10-12 10:14:06,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:14:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-10-12 10:14:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 10:14:06,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:06,220 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:06,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:14:06,220 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:06,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:06,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2026690601, now seen corresponding path program 6 times [2020-10-12 10:14:06,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:06,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658812290] [2020-10-12 10:14:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:06,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:07,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:09,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:09,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:09,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:11,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:11,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 10:14:11,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:14:11,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:14:11,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:11,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:14:11,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:11,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:14:11,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:11,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:11,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:11,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:11,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:11,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:11,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:11,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:11,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:11,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:11,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:11,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:14:11,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:11,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:11,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:11,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:11,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:11,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:11,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:11,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:14:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 10:14:11,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658812290] [2020-10-12 10:14:11,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:11,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:14:11,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280517968] [2020-10-12 10:14:11,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:14:11,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:11,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:14:11,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:14:11,384 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 13 states. [2020-10-12 10:14:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:12,059 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2020-10-12 10:14:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:14:12,060 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-12 10:14:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:12,062 INFO L225 Difference]: With dead ends: 139 [2020-10-12 10:14:12,062 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 10:14:12,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:14:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 10:14:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-12 10:14:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 10:14:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-10-12 10:14:12,093 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 47 [2020-10-12 10:14:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:12,096 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-10-12 10:14:12,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:14:12,098 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-10-12 10:14:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:14:12,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:12,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:12,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:14:12,108 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:12,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:12,108 INFO L82 PathProgramCache]: Analyzing trace with hash -683545557, now seen corresponding path program 12 times [2020-10-12 10:14:12,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:12,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375059038] [2020-10-12 10:14:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:12,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:12,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:12,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:13,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:13,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:16,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:16,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:16,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:17,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:17,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 10:14:17,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:14:17,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:14:17,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:14:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:14:17,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:17,710 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-12 10:14:17,848 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-12 10:14:18,081 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-12 10:14:18,396 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-12 10:14:18,581 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-12 10:14:18,769 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-12 10:14:18,955 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-12 10:14:19,123 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 10:14:19,439 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-12 10:14:20,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:20,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:20,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:20,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:20,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:20,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:20,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:20,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:20,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:20,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:20,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:20,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:20,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:20,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:20,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:20,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:20,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:20,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:20,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375059038] [2020-10-12 10:14:20,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:20,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:14:20,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174106727] [2020-10-12 10:14:20,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:14:20,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:14:20,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:14:20,650 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 34 states. [2020-10-12 10:14:21,065 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2020-10-12 10:14:21,408 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-12 10:14:21,625 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-12 10:14:22,113 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2020-10-12 10:14:22,334 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-12 10:14:22,525 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-12 10:14:22,883 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2020-10-12 10:14:23,218 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-10-12 10:14:23,496 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-12 10:14:23,750 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 61 [2020-10-12 10:14:24,006 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-12 10:14:24,530 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 77 [2020-10-12 10:14:24,904 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 63 [2020-10-12 10:14:25,198 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-10-12 10:14:25,876 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-12 10:14:26,230 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-12 10:14:26,430 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-12 10:14:26,650 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-12 10:14:26,965 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-12 10:14:27,207 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-12 10:14:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:27,546 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2020-10-12 10:14:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:14:27,549 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 49 [2020-10-12 10:14:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:27,550 INFO L225 Difference]: With dead ends: 89 [2020-10-12 10:14:27,550 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 10:14:27,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=491, Invalid=3415, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 10:14:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 10:14:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 10:14:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 10:14:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-12 10:14:27,562 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 49 [2020-10-12 10:14:27,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:27,562 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-12 10:14:27,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:14:27,562 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-12 10:14:27,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:14:27,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:27,563 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:27,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:14:27,563 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:27,564 INFO L82 PathProgramCache]: Analyzing trace with hash -737176853, now seen corresponding path program 13 times [2020-10-12 10:14:27,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:27,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614090742] [2020-10-12 10:14:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:27,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:28,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:28,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:28,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:32,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:32,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 10:14:32,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:14:32,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:14:32,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:32,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:14:32,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:32,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:14:32,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:32,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:32,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:32,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:32,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:32,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:32,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:32,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:32,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:32,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:32,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:32,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:32,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:32,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:32,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:14:32,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614090742] [2020-10-12 10:14:32,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:32,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:14:32,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651545018] [2020-10-12 10:14:32,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:14:32,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:32,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:14:32,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:14:32,679 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 12 states. [2020-10-12 10:14:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:33,081 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-12 10:14:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:14:33,082 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-12 10:14:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:33,083 INFO L225 Difference]: With dead ends: 72 [2020-10-12 10:14:33,083 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:14:33,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:14:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:14:33,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 10:14:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:14:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-12 10:14:33,094 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2020-10-12 10:14:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:33,094 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-12 10:14:33,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:14:33,094 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-12 10:14:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 10:14:33,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:33,095 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 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 10:14:33,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:14:33,095 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:33,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:33,095 INFO L82 PathProgramCache]: Analyzing trace with hash 874427315, now seen corresponding path program 14 times [2020-10-12 10:14:33,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:33,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417855238] [2020-10-12 10:14:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:33,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:33,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:34,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:34,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:35,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:35,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:36,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:37,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:37,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:37,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:38,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:38,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:14:38,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:14:38,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:14:38,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:14:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 10:14:38,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:39,403 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-12 10:14:39,567 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-12 10:14:39,761 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-12 10:14:39,924 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-12 10:14:40,115 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-12 10:14:40,338 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-10-12 10:14:40,616 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-10-12 10:14:40,845 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-12 10:14:41,011 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-12 10:14:41,231 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-12 10:14:41,551 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-12 10:14:43,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:43,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:43,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:43,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:43,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:43,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:43,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:43,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:43,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:43,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:43,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:43,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:43,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:43,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:43,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:43,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:43,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417855238] [2020-10-12 10:14:43,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:43,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 10:14:43,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268177511] [2020-10-12 10:14:43,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 10:14:43,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:43,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 10:14:43,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:14:43,441 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 42 states. [2020-10-12 10:14:44,904 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-12 10:14:45,309 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2020-10-12 10:14:45,643 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-12 10:14:46,153 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 64 [2020-10-12 10:14:46,584 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 68 [2020-10-12 10:14:47,187 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 66 [2020-10-12 10:14:47,668 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 67 [2020-10-12 10:14:48,069 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2020-10-12 10:14:48,351 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-12 10:14:48,802 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-10-12 10:14:49,093 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 74 [2020-10-12 10:14:49,495 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 83 [2020-10-12 10:14:49,850 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-10-12 10:14:50,213 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-12 10:14:50,417 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 10:14:50,872 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2020-10-12 10:14:51,075 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-12 10:14:51,384 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-12 10:14:51,675 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-12 10:14:52,115 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2020-10-12 10:14:52,434 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-10-12 10:14:52,683 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-12 10:14:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:53,211 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-10-12 10:14:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 10:14:53,213 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 57 [2020-10-12 10:14:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:53,214 INFO L225 Difference]: With dead ends: 102 [2020-10-12 10:14:53,214 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 10:14:53,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=668, Invalid=4882, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 10:14:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 10:14:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2020-10-12 10:14:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 10:14:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-12 10:14:53,233 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 57 [2020-10-12 10:14:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:53,233 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-12 10:14:53,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 10:14:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-12 10:14:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 10:14:53,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:53,235 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 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 10:14:53,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:14:53,235 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:53,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1874742453, now seen corresponding path program 15 times [2020-10-12 10:14:53,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:53,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353594330] [2020-10-12 10:14:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:53,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:53,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:53,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:58,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:58,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 10:14:58,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:14:58,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:14:58,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:14:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 10:14:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:14:58,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:58,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:58,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:58,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:58,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:58,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:58,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:58,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:58,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:58,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:58,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:58,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:58,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:58,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:58,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:58,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:58,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:58,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:58,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:58,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:58,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:58,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:58,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:14:58,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353594330] [2020-10-12 10:14:58,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:58,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:14:58,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406704060] [2020-10-12 10:14:58,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:14:58,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:58,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:14:58,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:14:58,386 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 14 states. [2020-10-12 10:14:58,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:58,905 INFO L93 Difference]: Finished difference Result 159 states and 172 transitions. [2020-10-12 10:14:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:14:58,906 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-12 10:14:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:58,908 INFO L225 Difference]: With dead ends: 159 [2020-10-12 10:14:58,908 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 10:14:58,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:14:58,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 10:14:58,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-10-12 10:14:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 10:14:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-12 10:14:58,923 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 59 [2020-10-12 10:14:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:58,923 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-12 10:14:58,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:14:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-12 10:14:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 10:14:58,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:58,924 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 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 10:14:58,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:14:58,925 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash -83160075, now seen corresponding path program 16 times [2020-10-12 10:14:58,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:58,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581665589] [2020-10-12 10:14:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:58,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:59,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:59,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:01,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:02,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:02,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:03,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 10:15:03,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:15:03,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:15:03,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:03,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:15:03,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:03,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 10:15:03,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:04,618 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-12 10:15:04,793 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-12 10:15:04,985 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-12 10:15:05,123 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-12 10:15:05,335 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-12 10:15:05,548 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-12 10:15:05,802 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-12 10:15:06,051 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-12 10:15:06,376 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2020-10-12 10:15:06,830 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2020-10-12 10:15:07,189 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 85 [2020-10-12 10:15:07,509 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 70 [2020-10-12 10:15:07,805 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-12 10:15:08,051 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-12 10:15:08,401 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2020-10-12 10:15:08,640 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-12 10:15:08,922 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-10-12 10:15:09,151 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-12 10:15:09,419 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-12 10:15:09,632 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-12 10:15:09,892 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-10-12 10:15:11,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:11,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:11,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:11,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:11,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:11,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:11,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:11,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:11,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:11,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:11,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:11,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:11,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:11,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:11,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:11,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:11,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:15:11,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:11,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:11,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:11,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:11,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:15:11,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581665589] [2020-10-12 10:15:11,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:11,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:15:11,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630353390] [2020-10-12 10:15:11,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:15:11,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:11,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:15:11,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:15:11,459 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 41 states. [2020-10-12 10:15:12,280 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 79 [2020-10-12 10:15:12,714 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 83 [2020-10-12 10:15:13,177 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 83 [2020-10-12 10:15:13,679 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 87 [2020-10-12 10:15:13,966 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-12 10:15:14,237 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-12 10:15:15,014 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 110 [2020-10-12 10:15:15,274 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 61 [2020-10-12 10:15:15,541 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 59 [2020-10-12 10:15:15,930 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 67 [2020-10-12 10:15:16,343 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 72 [2020-10-12 10:15:16,786 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 72 [2020-10-12 10:15:17,166 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 76 [2020-10-12 10:15:17,500 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 68 [2020-10-12 10:15:17,922 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 78 [2020-10-12 10:15:18,236 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-12 10:15:18,748 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 86 [2020-10-12 10:15:18,985 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2020-10-12 10:15:19,317 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 72 [2020-10-12 10:15:19,523 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-12 10:15:19,863 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 66 [2020-10-12 10:15:20,326 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2020-10-12 10:15:20,519 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-12 10:15:21,222 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 114 [2020-10-12 10:15:21,759 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 90 [2020-10-12 10:15:22,057 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-12 10:15:23,239 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 117 [2020-10-12 10:15:23,525 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-12 10:15:24,055 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2020-10-12 10:15:24,452 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 81 [2020-10-12 10:15:24,825 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-12 10:15:25,344 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 97 [2020-10-12 10:15:25,730 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 78 [2020-10-12 10:15:26,068 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2020-10-12 10:15:26,809 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 100 [2020-10-12 10:15:27,524 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-10-12 10:15:27,809 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-12 10:15:28,153 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-10-12 10:15:28,514 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-12 10:15:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:28,796 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-10-12 10:15:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 10:15:28,798 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2020-10-12 10:15:28,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:28,798 INFO L225 Difference]: With dead ends: 101 [2020-10-12 10:15:28,798 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 10:15:28,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=877, Invalid=6263, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 10:15:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 10:15:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-12 10:15:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 10:15:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-12 10:15:28,816 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 59 [2020-10-12 10:15:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:28,816 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-12 10:15:28,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:15:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-12 10:15:28,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 10:15:28,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:28,817 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 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 10:15:28,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:15:28,817 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:28,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:28,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1933212681, now seen corresponding path program 17 times [2020-10-12 10:15:28,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:28,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724293684] [2020-10-12 10:15:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:28,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:28,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:29,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:29,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:33,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:33,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 10:15:33,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:15:33,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:15:33,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:33,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:15:33,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 10:15:33,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:15:33,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:33,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:33,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:33,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:33,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:33,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:33,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:33,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:33,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:33,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:33,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:33,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:33,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:33,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:33,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:33,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:33,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:33,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:15:33,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:33,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:33,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:33,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:33,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-12 10:15:33,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724293684] [2020-10-12 10:15:33,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:33,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:15:33,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038875324] [2020-10-12 10:15:33,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:15:33,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:33,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:15:33,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:15:33,989 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 14 states. [2020-10-12 10:15:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:34,550 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-10-12 10:15:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:15:34,551 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-12 10:15:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:34,553 INFO L225 Difference]: With dead ends: 82 [2020-10-12 10:15:34,553 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 10:15:34,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:15:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 10:15:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-12 10:15:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 10:15:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-12 10:15:34,565 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 61 [2020-10-12 10:15:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:34,566 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-12 10:15:34,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:15:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-12 10:15:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 10:15:34,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:34,567 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 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 10:15:34,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:15:34,568 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:34,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1999770427, now seen corresponding path program 18 times [2020-10-12 10:15:34,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:34,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221003973] [2020-10-12 10:15:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:34,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:35,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:36,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking...