/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/ms1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:11:31,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:11:31,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:11:31,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:11:31,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:11:31,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:11:31,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:11:31,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:11:31,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:11:31,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:11:31,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:11:31,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:11:31,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:11:31,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:11:31,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:11:31,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:11:31,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:11:31,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:11:31,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:11:31,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:11:31,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:11:31,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:11:31,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:11:31,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:11:31,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:11:31,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:11:31,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:11:31,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:11:31,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:11:31,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:11:31,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:11:31,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:11:31,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:11:31,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:11:31,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:11:31,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:11:31,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:11:31,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:11:31,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:11:31,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:11:31,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:11:31,667 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 10:11:31,711 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:11:31,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:11:31,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:11:31,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:11:31,714 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:11:31,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:11:31,715 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:11:31,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:11:31,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:11:31,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:11:31,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:11:31,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:11:31,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:11:31,717 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:11:31,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:11:31,718 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:11:31,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:11:31,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:11:31,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:11:31,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:11:31,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:11:31,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:11:31,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:11:31,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:11:31,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:11:31,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:11:31,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:11:31,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:11:31,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:11:31,721 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 10:11:32,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:11:32,019 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:11:32,022 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:11:32,024 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:11:32,024 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:11:32,025 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms1.c [2020-10-12 10:11:32,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d05748555/5ea35b2bc9094a139619fe54013ffb4b/FLAGd8961176a [2020-10-12 10:11:32,547 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:11:32,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms1.c [2020-10-12 10:11:32,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d05748555/5ea35b2bc9094a139619fe54013ffb4b/FLAGd8961176a [2020-10-12 10:11:32,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d05748555/5ea35b2bc9094a139619fe54013ffb4b [2020-10-12 10:11:32,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:11:32,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:11:32,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:32,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:11:32,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:11:32,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:32" (1/1) ... [2020-10-12 10:11:32,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@483fefda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:32, skipping insertion in model container [2020-10-12 10:11:32,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:32" (1/1) ... [2020-10-12 10:11:32,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:11:32,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:11:33,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:33,159 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:11:33,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:33,195 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:11:33,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:33 WrapperNode [2020-10-12 10:11:33,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:33,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:11:33,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:11:33,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:11:33,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:33" (1/1) ... [2020-10-12 10:11:33,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:33" (1/1) ... [2020-10-12 10:11:33,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:33" (1/1) ... [2020-10-12 10:11:33,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:33" (1/1) ... [2020-10-12 10:11:33,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:33" (1/1) ... [2020-10-12 10:11:33,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:33" (1/1) ... [2020-10-12 10:11:33,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:33" (1/1) ... [2020-10-12 10:11:33,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:11:33,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:11:33,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:11:33,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:11:33,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:33" (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 10:11:33,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:11:33,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:11:33,376 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:11:33,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:11:33,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:11:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:11:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:11:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:11:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:11:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:11:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:11:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:11:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:11:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:11:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:11:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:11:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:11:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:11:33,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:11:33,648 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:11:33,648 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:11:33,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:33 BoogieIcfgContainer [2020-10-12 10:11:33,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:11:33,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:11:33,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:11:33,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:11:33,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:11:32" (1/3) ... [2020-10-12 10:11:33,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44df727a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:33, skipping insertion in model container [2020-10-12 10:11:33,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:33" (2/3) ... [2020-10-12 10:11:33,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44df727a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:33, skipping insertion in model container [2020-10-12 10:11:33,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:33" (3/3) ... [2020-10-12 10:11:33,662 INFO L109 eAbstractionObserver]: Analyzing ICFG ms1.c [2020-10-12 10:11:33,688 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:11:33,697 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:11:33,726 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:11:33,746 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:11:33,746 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:11:33,746 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:11:33,746 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:11:33,747 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:11:33,747 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:11:33,747 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:11:33,747 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:11:33,765 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-12 10:11:33,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 10:11:33,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:33,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:33,772 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:33,777 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-10-12 10:11:33,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:33,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074086803] [2020-10-12 10:11:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:33,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:33,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:34,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:34,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:34,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 10:11:34,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:11:34,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-12 10:11:34,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:11:34,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:11:34,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:11:34,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:11:34,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:34,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:34,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:34,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:34,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:34,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:11:34,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:34,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:34,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:34,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:34,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:34,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:34,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:34,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:34,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:34,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:34,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:11:34,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:11:34,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:34,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:11:34,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:34,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:11:34,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:34,599 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 10:11:34,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074086803] [2020-10-12 10:11:34,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:11:34,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 10:11:34,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444622126] [2020-10-12 10:11:34,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:11:34,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:34,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:11:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:11:34,626 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2020-10-12 10:11:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:34,804 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-10-12 10:11:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:11:34,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-12 10:11:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:34,816 INFO L225 Difference]: With dead ends: 63 [2020-10-12 10:11:34,816 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 10:11:34,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:11:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 10:11:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-12 10:11:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 10:11:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-12 10:11:34,865 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-10-12 10:11:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:34,866 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-12 10:11:34,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:11:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-12 10:11:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:11:34,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:34,868 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] [2020-10-12 10:11:34,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:11:34,869 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-10-12 10:11:34,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:34,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563671715] [2020-10-12 10:11:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:34,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:35,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:35,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:11:35,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:35,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-12 10:11:35,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:11:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 10:11:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 10:11:35,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:35,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:35,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:35,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:35,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:35,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:35,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:11:35,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:35,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:35,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:35,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:35,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 10:11:35,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:35,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:35,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:35,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:35,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:35,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:11:35,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:11:35,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563671715] [2020-10-12 10:11:35,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:11:35,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 10:11:35,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235545709] [2020-10-12 10:11:35,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 10:11:35,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:35,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 10:11:35,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:11:35,222 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-12 10:11:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:35,355 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-10-12 10:11:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 10:11:35,355 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-12 10:11:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:35,357 INFO L225 Difference]: With dead ends: 37 [2020-10-12 10:11:35,357 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 10:11:35,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:11:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 10:11:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-12 10:11:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 10:11:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 10:11:35,365 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-10-12 10:11:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:35,366 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 10:11:35,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 10:11:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 10:11:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 10:11:35,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:35,367 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] [2020-10-12 10:11:35,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:11:35,368 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:35,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1827351009, now seen corresponding path program 1 times [2020-10-12 10:11:35,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:35,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392093106] [2020-10-12 10:11:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:35,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:35,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:35,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:35,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:35,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:35,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:36,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:36,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:36,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 10:11:36,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:11:36,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1515 [2020-10-12 10:11:36,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:11:36,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:11:36,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:11:36,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:37,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:37,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:37,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:37,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:37,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:37,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:37,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:37,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:37,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:37,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:37,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:37,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:37,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:37,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:37,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:37,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:37,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392093106] [2020-10-12 10:11:37,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:37,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:11:37,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920289809] [2020-10-12 10:11:37,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:11:37,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:37,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:11:37,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:11:37,185 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 14 states. [2020-10-12 10:11:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:37,768 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-12 10:11:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:11:37,769 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-12 10:11:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:37,773 INFO L225 Difference]: With dead ends: 43 [2020-10-12 10:11:37,773 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:11:37,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:11:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:11:37,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-12 10:11:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 10:11:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-12 10:11:37,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-10-12 10:11:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:37,787 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-12 10:11:37,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:11:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-12 10:11:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:11:37,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:37,789 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-12 10:11:37,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:11:37,790 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash 963777163, now seen corresponding path program 2 times [2020-10-12 10:11:37,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:37,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931468803] [2020-10-12 10:11:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:37,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:41,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 10:11:41,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:11:41,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3813 [2020-10-12 10:11:41,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:11:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:11:41,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:41,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:41,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:41,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:41,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:41,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:41,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:41,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:41,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:41,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:41,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:41,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:41,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:41,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:41,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:41,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:41,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:41,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:41,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:11:41,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931468803] [2020-10-12 10:11:41,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:41,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:11:41,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299099107] [2020-10-12 10:11:41,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:11:41,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:11:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:11:41,774 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 12 states. [2020-10-12 10:11:42,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:42,024 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-12 10:11:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:11:42,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-12 10:11:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:42,026 INFO L225 Difference]: With dead ends: 57 [2020-10-12 10:11:42,026 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 10:11:42,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:11:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 10:11:42,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-12 10:11:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 10:11:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-12 10:11:42,035 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2020-10-12 10:11:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:42,036 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-12 10:11:42,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:11:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-12 10:11:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:11:42,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:42,038 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:42,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:11:42,039 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:42,039 INFO L82 PathProgramCache]: Analyzing trace with hash -726852151, now seen corresponding path program 3 times [2020-10-12 10:11:42,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:42,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368786093] [2020-10-12 10:11:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:42,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:44,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 10:11:44,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:11:44,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2110 [2020-10-12 10:11:44,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:11:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:11:44,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:44,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:44,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:44,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:44,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:44,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:44,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:44,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:44,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:44,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:44,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:44,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:44,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:44,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:44,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:44,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:44,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:44,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:44,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:44,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:44,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:44,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368786093] [2020-10-12 10:11:44,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:44,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:11:44,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355706150] [2020-10-12 10:11:44,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:11:44,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:44,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:11:44,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:11:44,832 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 18 states. [2020-10-12 10:11:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:45,932 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-12 10:11:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:11:45,933 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-12 10:11:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:45,936 INFO L225 Difference]: With dead ends: 82 [2020-10-12 10:11:45,936 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 10:11:45,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:11:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 10:11:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-12 10:11:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:11:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-12 10:11:45,948 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 34 [2020-10-12 10:11:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:45,948 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-12 10:11:45,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:11:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-12 10:11:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:11:45,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:45,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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 10:11:45,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:11:45,951 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:45,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:45,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1923985017, now seen corresponding path program 4 times [2020-10-12 10:11:45,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:45,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542540856] [2020-10-12 10:11:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:45,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:46,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:46,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:47,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:47,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:11:47,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:11:47,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1181 [2020-10-12 10:11:47,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:47,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:11:47,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:47,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:11:47,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:47,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:47,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:47,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:47,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:47,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:47,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:47,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:47,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:47,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:47,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:47,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:47,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:47,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:47,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:47,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:47,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:47,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:47,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:47,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:47,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:47,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:47,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542540856] [2020-10-12 10:11:47,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:47,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:11:47,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436151997] [2020-10-12 10:11:47,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:11:47,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:47,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:11:47,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:11:47,698 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 19 states. [2020-10-12 10:11:48,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:48,865 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-10-12 10:11:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:11:48,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-10-12 10:11:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:48,867 INFO L225 Difference]: With dead ends: 81 [2020-10-12 10:11:48,867 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 10:11:48,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:11:48,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 10:11:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2020-10-12 10:11:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:11:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-12 10:11:48,876 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 36 [2020-10-12 10:11:48,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:48,877 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-12 10:11:48,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:11:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-12 10:11:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:11:48,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:48,878 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-12 10:11:48,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:11:48,879 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1855081823, now seen corresponding path program 5 times [2020-10-12 10:11:48,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:48,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040030382] [2020-10-12 10:11:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:48,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:48,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:53,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:11:53,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:11:53,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:11:53,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:11:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:11:53,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:54,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:54,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:54,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:54,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:54,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:54,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:54,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:54,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:54,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:54,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:54,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:54,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:54,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:54,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:54,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:54,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:11:54,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040030382] [2020-10-12 10:11:54,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:54,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:11:54,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976074153] [2020-10-12 10:11:54,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:11:54,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:54,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:11:54,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:11:54,108 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 15 states. [2020-10-12 10:11:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:54,511 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-10-12 10:11:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:11:54,512 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-12 10:11:54,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:54,513 INFO L225 Difference]: With dead ends: 61 [2020-10-12 10:11:54,513 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 10:11:54,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:11:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 10:11:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-12 10:11:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 10:11:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-12 10:11:54,528 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 37 [2020-10-12 10:11:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:54,531 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-12 10:11:54,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:11:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-12 10:11:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:11:54,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:54,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-12 10:11:54,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:11:54,537 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:54,539 INFO L82 PathProgramCache]: Analyzing trace with hash -231866845, now seen corresponding path program 6 times [2020-10-12 10:11:54,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:54,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886238477] [2020-10-12 10:11:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:54,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:58,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:11:58,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:11:58,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4420 [2020-10-12 10:11:58,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:11:58,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:58,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:11:58,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:59,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:59,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:59,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:59,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:59,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:59,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:59,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:59,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:59,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:59,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:59,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:59,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:59,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:59,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:59,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:59,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:59,622 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 10:11:59,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886238477] [2020-10-12 10:11:59,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:59,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:11:59,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155310061] [2020-10-12 10:11:59,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:11:59,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:59,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:11:59,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:11:59,625 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 22 states. [2020-10-12 10:12:00,688 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-12 10:12:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:01,361 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-10-12 10:12:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:12:01,362 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-10-12 10:12:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:01,364 INFO L225 Difference]: With dead ends: 86 [2020-10-12 10:12:01,364 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 10:12:01,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=342, Invalid=1550, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:12:01,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 10:12:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-12 10:12:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 10:12:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-12 10:12:01,377 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 39 [2020-10-12 10:12:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:01,377 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-12 10:12:01,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:12:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-12 10:12:01,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 10:12:01,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:01,379 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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 10:12:01,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:12:01,380 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:01,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:01,380 INFO L82 PathProgramCache]: Analyzing trace with hash 604598565, now seen corresponding path program 7 times [2020-10-12 10:12:01,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:01,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950250517] [2020-10-12 10:12:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:01,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:03,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 10:12:03,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:12:03,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1799 [2020-10-12 10:12:03,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:12:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:12:03,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:03,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:03,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:03,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:03,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:03,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:03,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:03,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:03,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:03,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:03,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:03,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:03,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:03,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:03,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:03,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:03,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:03,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:03,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950250517] [2020-10-12 10:12:03,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:03,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:12:03,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754082513] [2020-10-12 10:12:03,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:12:03,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:04,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:12:04,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:12:04,000 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 23 states. [2020-10-12 10:12:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:05,781 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-10-12 10:12:05,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:12:05,781 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-10-12 10:12:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:05,783 INFO L225 Difference]: With dead ends: 86 [2020-10-12 10:12:05,783 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 10:12:05,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:12:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 10:12:05,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-12 10:12:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 10:12:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-12 10:12:05,794 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 41 [2020-10-12 10:12:05,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:05,794 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-12 10:12:05,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:12:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-12 10:12:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:12:05,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:05,795 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-12 10:12:05,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:12:05,796 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:05,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:05,796 INFO L82 PathProgramCache]: Analyzing trace with hash -629780027, now seen corresponding path program 8 times [2020-10-12 10:12:05,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:05,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711528998] [2020-10-12 10:12:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:05,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:10,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:10,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:12:10,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:12:10,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4298 [2020-10-12 10:12:10,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:10,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:12:10,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:10,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:12:10,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:11,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:11,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:11,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:11,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:11,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:11,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:11,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:11,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:11,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:11,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:11,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:11,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:11,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:11,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:11,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:11,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:11,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:11,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:11,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711528998] [2020-10-12 10:12:11,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:11,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:12:11,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843538255] [2020-10-12 10:12:11,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:12:11,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:11,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:12:11,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:12:11,280 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 26 states. [2020-10-12 10:12:13,292 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-12 10:12:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:14,203 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2020-10-12 10:12:14,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:12:14,204 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2020-10-12 10:12:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:14,205 INFO L225 Difference]: With dead ends: 121 [2020-10-12 10:12:14,206 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 10:12:14,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:12:14,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 10:12:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2020-10-12 10:12:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 10:12:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2020-10-12 10:12:14,222 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 44 [2020-10-12 10:12:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:14,223 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2020-10-12 10:12:14,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:12:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2020-10-12 10:12:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 10:12:14,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:14,224 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 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 10:12:14,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:12:14,224 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash -358579293, now seen corresponding path program 9 times [2020-10-12 10:12:14,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:14,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084392604] [2020-10-12 10:12:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:14,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:17,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:17,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:17,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:17,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:17,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:19,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:12:19,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-12 10:12:19,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:12:19,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:12:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:12:19,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:19,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:19,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:19,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:19,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:19,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:19,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:19,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:19,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:19,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:19,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:19,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:19,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:19,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:19,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:19,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:19,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:19,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 10:12:19,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084392604] [2020-10-12 10:12:19,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:19,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:12:19,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847925797] [2020-10-12 10:12:19,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:12:19,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:12:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:12:19,529 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand 18 states. [2020-10-12 10:12:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:20,067 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2020-10-12 10:12:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:12:20,068 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-12 10:12:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:20,069 INFO L225 Difference]: With dead ends: 104 [2020-10-12 10:12:20,069 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 10:12:20,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:12:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 10:12:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 10:12:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 10:12:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-10-12 10:12:20,080 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 45 [2020-10-12 10:12:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:20,081 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-10-12 10:12:20,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:12:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-10-12 10:12:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 10:12:20,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:20,082 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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 10:12:20,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:12:20,082 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:20,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:20,083 INFO L82 PathProgramCache]: Analyzing trace with hash -634097661, now seen corresponding path program 10 times [2020-10-12 10:12:20,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:20,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536555765] [2020-10-12 10:12:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:20,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:20,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:20,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:20,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:21,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:22,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 10:12:22,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:12:22,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2429 [2020-10-12 10:12:22,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:22,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:12:22,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:22,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:12:22,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:23,344 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-12 10:12:23,725 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-12 10:12:24,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:24,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:24,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:24,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:24,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:24,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:24,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:24,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:24,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:24,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:24,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:24,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:24,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:24,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:24,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:24,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:24,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:24,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536555765] [2020-10-12 10:12:24,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:24,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:12:24,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560232905] [2020-10-12 10:12:24,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:12:24,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:24,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:12:24,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:12:24,227 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 27 states. [2020-10-12 10:12:25,219 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2020-10-12 10:12:25,926 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 46 [2020-10-12 10:12:26,183 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-12 10:12:26,543 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-12 10:12:26,708 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2020-10-12 10:12:27,742 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-12 10:12:27,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:27,784 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2020-10-12 10:12:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:12:27,784 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 46 [2020-10-12 10:12:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:27,786 INFO L225 Difference]: With dead ends: 79 [2020-10-12 10:12:27,786 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 10:12:27,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:12:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 10:12:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-12 10:12:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 10:12:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-10-12 10:12:27,798 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 46 [2020-10-12 10:12:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:27,799 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-10-12 10:12:27,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:12:27,799 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-10-12 10:12:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:12:27,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:27,800 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-12 10:12:27,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:12:27,800 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:27,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash -270041561, now seen corresponding path program 11 times [2020-10-12 10:12:27,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:27,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945001831] [2020-10-12 10:12:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:27,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:32,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 10:12:32,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:12:32,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 10:12:32,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:12:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:12:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:12:32,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:33,743 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 40 [2020-10-12 10:12:34,084 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 45 [2020-10-12 10:12:35,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:35,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:35,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:35,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:35,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:35,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:35,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:35,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:35,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:35,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:35,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:35,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:35,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:35,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:35,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:35,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:35,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:35,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:35,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:35,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:35,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945001831] [2020-10-12 10:12:35,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:35,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:12:35,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461492175] [2020-10-12 10:12:35,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:12:35,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:12:35,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:12:35,106 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 30 states. [2020-10-12 10:12:35,973 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-12 10:12:36,626 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2020-10-12 10:12:37,469 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-12 10:12:37,784 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-12 10:12:38,128 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-12 10:12:38,302 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-12 10:12:38,546 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-12 10:12:38,832 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-12 10:12:39,246 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-12 10:12:39,414 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-12 10:12:40,074 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-12 10:12:40,234 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-12 10:12:40,497 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-12 10:12:40,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:40,655 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-10-12 10:12:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:12:40,655 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2020-10-12 10:12:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:40,657 INFO L225 Difference]: With dead ends: 110 [2020-10-12 10:12:40,657 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 10:12:40,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=550, Invalid=3232, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 10:12:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 10:12:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2020-10-12 10:12:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 10:12:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-10-12 10:12:40,670 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 49 [2020-10-12 10:12:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:40,671 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-10-12 10:12:40,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:12:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-10-12 10:12:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 10:12:40,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:40,672 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 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 10:12:40,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:12:40,672 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:40,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1680861755, now seen corresponding path program 12 times [2020-10-12 10:12:40,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:40,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988003499] [2020-10-12 10:12:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:40,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:41,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:41,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:41,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:41,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:45,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 10:12:45,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-12 10:12:45,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:12:45,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:45,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:12:45,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:12:45,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:46,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:46,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:46,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:46,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:46,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:46,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:46,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:46,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:46,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:46,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:46,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:46,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:46,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:46,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:46,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:46,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:46,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:46,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:46,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:46,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:12:46,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988003499] [2020-10-12 10:12:46,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:46,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:12:46,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554015281] [2020-10-12 10:12:46,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:12:46,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:46,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:12:46,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:12:46,081 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 19 states. [2020-10-12 10:12:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:46,948 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-10-12 10:12:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:12:46,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-10-12 10:12:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:46,950 INFO L225 Difference]: With dead ends: 96 [2020-10-12 10:12:46,950 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 10:12:46,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:12:46,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 10:12:46,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-10-12 10:12:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 10:12:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-12 10:12:46,959 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 50 [2020-10-12 10:12:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:46,959 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-12 10:12:46,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:12:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-12 10:12:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:12:46,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:46,960 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 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 10:12:46,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:12:46,961 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash 532811139, now seen corresponding path program 13 times [2020-10-12 10:12:46,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:46,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438141970] [2020-10-12 10:12:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:46,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:49,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:51,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:51,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 10:12:51,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:12:51,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:12:51,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:51,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:12:51,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:51,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:12:51,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:53,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:53,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:53,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:53,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:53,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:53,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:53,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:53,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:53,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:53,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:53,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:53,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:53,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:53,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:53,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:53,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:53,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438141970] [2020-10-12 10:12:53,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:53,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:12:53,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838300263] [2020-10-12 10:12:53,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:12:53,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:53,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:12:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:12:53,535 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 31 states. [2020-10-12 10:12:54,355 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-12 10:12:55,746 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-12 10:12:56,061 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-12 10:12:57,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:57,122 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2020-10-12 10:12:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:12:57,123 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 52 [2020-10-12 10:12:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:57,124 INFO L225 Difference]: With dead ends: 137 [2020-10-12 10:12:57,124 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 10:12:57,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=524, Invalid=2898, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 10:12:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 10:12:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2020-10-12 10:12:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 10:12:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2020-10-12 10:12:57,138 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 52 [2020-10-12 10:12:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:57,139 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2020-10-12 10:12:57,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:12:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2020-10-12 10:12:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:12:57,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:57,140 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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 10:12:57,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:12:57,140 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:57,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1863650753, now seen corresponding path program 14 times [2020-10-12 10:12:57,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:57,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049458535] [2020-10-12 10:12:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:57,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:59,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:59,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:02,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:02,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:13:02,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:13:02,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:13:02,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:02,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:13:02,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:02,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 10:13:02,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:04,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:04,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:04,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:04,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:04,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:04,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:04,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:04,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:04,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:04,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:04,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:04,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:04,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:04,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:04,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:04,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:04,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:04,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:04,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:04,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:04,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049458535] [2020-10-12 10:13:04,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:04,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:13:04,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362499152] [2020-10-12 10:13:04,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:13:04,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:04,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:13:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:13:04,255 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand 34 states. [2020-10-12 10:13:05,294 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-12 10:13:05,779 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2020-10-12 10:13:07,680 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 46 [2020-10-12 10:13:07,920 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-10-12 10:13:08,190 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2020-10-12 10:13:08,676 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2020-10-12 10:13:08,982 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-12 10:13:09,233 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-12 10:13:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:10,218 INFO L93 Difference]: Finished difference Result 181 states and 215 transitions. [2020-10-12 10:13:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 10:13:10,219 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 54 [2020-10-12 10:13:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:10,221 INFO L225 Difference]: With dead ends: 181 [2020-10-12 10:13:10,221 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 10:13:10,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=746, Invalid=4084, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 10:13:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 10:13:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 130. [2020-10-12 10:13:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-12 10:13:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2020-10-12 10:13:10,238 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 54 [2020-10-12 10:13:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:10,239 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2020-10-12 10:13:10,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:13:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2020-10-12 10:13:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 10:13:10,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:10,240 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 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 10:13:10,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:13:10,240 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash 900265599, now seen corresponding path program 15 times [2020-10-12 10:13:10,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:10,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147179323] [2020-10-12 10:13:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:10,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:14,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:14,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:14,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:13:14,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:13:14,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4180 [2020-10-12 10:13:14,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:13:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 10:13:14,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:14,941 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-12 10:13:15,127 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-12 10:13:15,306 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-12 10:13:15,475 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-12 10:13:17,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:17,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:17,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:17,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:17,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:17,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:17,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:17,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:17,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:17,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:17,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:17,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:17,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:17,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:17,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:17,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:17,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:17,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147179323] [2020-10-12 10:13:17,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:17,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:13:17,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786313362] [2020-10-12 10:13:17,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:13:17,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:17,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:13:17,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:13:17,260 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand 35 states. [2020-10-12 10:13:18,752 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-12 10:13:19,401 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2020-10-12 10:13:19,650 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 52 [2020-10-12 10:13:19,907 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 48 [2020-10-12 10:13:20,549 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-12 10:13:20,742 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-10-12 10:13:21,028 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-12 10:13:22,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:22,441 INFO L93 Difference]: Finished difference Result 173 states and 201 transitions. [2020-10-12 10:13:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:13:22,443 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 56 [2020-10-12 10:13:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:22,444 INFO L225 Difference]: With dead ends: 173 [2020-10-12 10:13:22,445 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 10:13:22,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 10:13:22,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 10:13:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 127. [2020-10-12 10:13:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 10:13:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2020-10-12 10:13:22,458 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 56 [2020-10-12 10:13:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:22,459 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2020-10-12 10:13:22,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:13:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2020-10-12 10:13:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:13:22,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:22,460 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 5, 5, 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 10:13:22,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:13:22,460 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:22,461 INFO L82 PathProgramCache]: Analyzing trace with hash -318534909, now seen corresponding path program 16 times [2020-10-12 10:13:22,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:22,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420240115] [2020-10-12 10:13:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:22,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:22,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:22,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:22,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:22,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:22,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:24,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:24,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:24,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:24,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:24,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:25,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:25,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:26,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:26,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:26,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:26,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:27,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:13:27,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-12 10:13:27,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:13:27,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:13:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:13:27,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:28,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:28,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:28,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:28,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:28,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:28,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:28,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:28,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:28,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:28,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:28,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:28,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:28,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:28,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:28,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:28,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:28,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:28,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 16 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:13:28,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420240115] [2020-10-12 10:13:28,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:28,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:13:28,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883969962] [2020-10-12 10:13:28,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:13:28,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:13:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:13:28,232 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand 25 states. [2020-10-12 10:13:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:29,454 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2020-10-12 10:13:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:13:29,455 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-12 10:13:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:29,456 INFO L225 Difference]: With dead ends: 138 [2020-10-12 10:13:29,456 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 10:13:29,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:13:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 10:13:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-12 10:13:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 10:13:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2020-10-12 10:13:29,469 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 58 [2020-10-12 10:13:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:29,470 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2020-10-12 10:13:29,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:13:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2020-10-12 10:13:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 10:13:29,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:29,471 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 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 10:13:29,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:13:29,471 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:29,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1391094229, now seen corresponding path program 17 times [2020-10-12 10:13:29,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:29,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957736105] [2020-10-12 10:13:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:29,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:30,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:30,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:30,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:30,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:30,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:34,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:34,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 10:13:34,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:13:34,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:13:34,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:13:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:13:34,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:35,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:35,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:35,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:35,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:35,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:35,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:35,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:35,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:35,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:35,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:35,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:35,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:35,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:35,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:35,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:35,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:35,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:35,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:35,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:13:35,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957736105] [2020-10-12 10:13:35,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:35,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:13:35,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914302720] [2020-10-12 10:13:35,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:13:35,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:13:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:13:35,323 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand 29 states. [2020-10-12 10:13:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:36,633 INFO L93 Difference]: Finished difference Result 175 states and 195 transitions. [2020-10-12 10:13:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:13:36,634 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2020-10-12 10:13:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:36,635 INFO L225 Difference]: With dead ends: 175 [2020-10-12 10:13:36,635 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 10:13:36,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=584, Invalid=2386, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 10:13:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 10:13:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-12 10:13:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 10:13:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-12 10:13:36,643 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2020-10-12 10:13:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:36,643 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-12 10:13:36,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:13:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-12 10:13:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 10:13:36,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:36,643 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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 10:13:36,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:13:36,644 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:36,644 INFO L82 PathProgramCache]: Analyzing trace with hash 854291501, now seen corresponding path program 18 times [2020-10-12 10:13:36,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:36,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400757703] [2020-10-12 10:13:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:36,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:39,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:39,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:40,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:41,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:41,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:41,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 10:13:41,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:13:41,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:13:41,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:41,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 10:13:41,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:41,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 10:13:41,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:42,679 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-12 10:13:42,830 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-12 10:13:42,986 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-12 10:13:45,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:45,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:45,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:45,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:45,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:45,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:45,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:45,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:45,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:45,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:45,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:45,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:45,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:45,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:45,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:45,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:45,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:45,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:45,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:45,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:45,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:45,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:45,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400757703] [2020-10-12 10:13:45,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:45,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 10:13:45,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084475725] [2020-10-12 10:13:45,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 10:13:45,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:45,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 10:13:45,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:13:45,311 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 39 states. [2020-10-12 10:13:45,839 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-12 10:13:46,089 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-12 10:13:46,324 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-12 10:13:46,770 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-12 10:13:47,206 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-12 10:13:47,453 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2020-10-12 10:13:47,761 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2020-10-12 10:13:47,970 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-12 10:13:48,175 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-12 10:13:48,347 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-12 10:13:48,665 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 61 [2020-10-12 10:13:49,017 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 56 [2020-10-12 10:13:49,333 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2020-10-12 10:13:49,647 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-12 10:13:49,960 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-12 10:13:50,218 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-10-12 10:13:50,448 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-12 10:13:50,784 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2020-10-12 10:13:51,169 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-12 10:13:51,593 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-12 10:13:52,374 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-12 10:13:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:52,487 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2020-10-12 10:13:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:13:52,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 61 [2020-10-12 10:13:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:52,489 INFO L225 Difference]: With dead ends: 99 [2020-10-12 10:13:52,489 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 10:13:52,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=676, Invalid=4154, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 10:13:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 10:13:52,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-12 10:13:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 10:13:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-12 10:13:52,501 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 61 [2020-10-12 10:13:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:52,501 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-12 10:13:52,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 10:13:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-12 10:13:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 10:13:52,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:52,502 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 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 10:13:52,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:13:52,502 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash -910880323, now seen corresponding path program 19 times [2020-10-12 10:13:52,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:52,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774915859] [2020-10-12 10:13:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:52,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:53,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:53,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:53,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:54,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:54,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:55,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:55,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:57,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 10:13:57,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:13:57,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:13:57,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:57,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:13:57,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:57,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 10:13:57,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:58,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:58,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:58,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:58,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:58,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:58,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:58,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:58,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:58,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:58,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:58,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:58,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:58,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:58,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:58,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:58,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:58,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:58,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:13:58,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774915859] [2020-10-12 10:13:58,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:58,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:13:58,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819061748] [2020-10-12 10:13:58,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:13:58,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:58,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:13:58,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:13:58,643 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 32 states. [2020-10-12 10:14:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:00,185 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2020-10-12 10:14:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:14:00,185 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 64 [2020-10-12 10:14:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:00,186 INFO L225 Difference]: With dead ends: 128 [2020-10-12 10:14:00,186 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 10:14:00,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=723, Invalid=2937, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 10:14:00,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 10:14:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-12 10:14:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 10:14:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-12 10:14:00,198 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 64 [2020-10-12 10:14:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:00,198 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-12 10:14:00,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:14:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-12 10:14:00,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:14:00,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:00,199 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 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 10:14:00,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:14:00,200 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2017699067, now seen corresponding path program 20 times [2020-10-12 10:14:00,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:00,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470084845] [2020-10-12 10:14:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:00,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:00,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:01,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:02,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:03,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:04,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:05,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:05,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 10:14:05,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:14:05,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:14:05,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:14:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 10:14:05,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:06,384 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-12 10:14:06,572 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-12 10:14:06,758 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-12 10:14:06,987 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2020-10-12 10:14:07,225 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2020-10-12 10:14:07,404 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-12 10:14:07,639 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-12 10:14:07,875 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-12 10:14:08,136 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2020-10-12 10:14:08,337 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2020-10-12 10:14:08,785 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-12 10:14:09,101 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-12 10:14:09,461 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-12 10:14:10,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:10,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:10,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:10,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:10,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:10,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:10,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:10,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:10,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:10,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:10,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:10,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:10,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:10,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:10,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:10,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:10,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:10,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:10,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 25 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:10,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470084845] [2020-10-12 10:14:10,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:10,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:14:10,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845183309] [2020-10-12 10:14:10,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:14:10,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:10,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:14:10,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:14:10,671 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 43 states. [2020-10-12 10:14:11,266 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-12 10:14:11,514 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-12 10:14:11,852 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-12 10:14:12,223 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-12 10:14:12,651 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-12 10:14:13,060 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-12 10:14:13,293 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-12 10:14:13,947 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-10-12 10:14:14,460 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-12 10:14:14,670 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2020-10-12 10:14:14,865 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-10-12 10:14:15,135 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-12 10:14:15,368 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2020-10-12 10:14:15,627 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-12 10:14:15,845 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-12 10:14:16,331 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 67 [2020-10-12 10:14:16,717 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 56 [2020-10-12 10:14:17,070 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2020-10-12 10:14:17,444 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2020-10-12 10:14:17,787 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 58 [2020-10-12 10:14:18,108 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-12 10:14:18,382 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-12 10:14:18,829 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2020-10-12 10:14:19,153 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-12 10:14:19,422 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-12 10:14:19,663 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-12 10:14:19,904 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-12 10:14:20,194 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-12 10:14:20,685 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-12 10:14:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:21,194 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-10-12 10:14:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 10:14:21,199 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 66 [2020-10-12 10:14:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:21,199 INFO L225 Difference]: With dead ends: 76 [2020-10-12 10:14:21,199 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 10:14:21,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=985, Invalid=5821, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 10:14:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 10:14:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 10:14:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 10:14:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2020-10-12 10:14:21,212 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 66 [2020-10-12 10:14:21,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:21,212 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2020-10-12 10:14:21,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:14:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2020-10-12 10:14:21,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 10:14:21,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:21,213 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 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 10:14:21,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:14:21,213 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:21,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:21,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2072806959, now seen corresponding path program 21 times [2020-10-12 10:14:21,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:21,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538987604] [2020-10-12 10:14:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:21,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:21,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:21,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:21,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:21,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:23,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:23,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:24,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:24,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:26,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:26,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 10:14:26,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:14:26,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:14:26,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:26,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 10:14:26,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:26,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 10:14:26,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:27,773 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-12 10:14:27,987 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-12 10:14:28,953 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-12 10:14:29,358 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-12 10:14:29,772 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-12 10:14:31,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:31,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:31,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:31,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:31,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:31,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:31,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:31,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:31,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:31,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:31,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:31,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:31,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:31,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:31,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:31,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:31,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:31,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:31,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:31,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:31,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:31,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:31,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538987604] [2020-10-12 10:14:31,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:31,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 10:14:31,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652354698] [2020-10-12 10:14:31,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 10:14:31,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:31,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 10:14:31,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:14:31,594 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 46 states. [2020-10-12 10:14:33,522 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-12 10:14:33,854 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-12 10:14:34,428 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 93 [2020-10-12 10:14:34,911 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 49 [2020-10-12 10:14:35,210 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-12 10:14:35,847 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2020-10-12 10:14:36,180 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-12 10:14:36,503 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2020-10-12 10:14:36,817 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-12 10:14:37,176 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 65 [2020-10-12 10:14:37,560 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2020-10-12 10:14:37,861 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-12 10:14:38,078 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-12 10:14:38,602 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 59 [2020-10-12 10:14:39,054 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 57 [2020-10-12 10:14:39,557 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 59 [2020-10-12 10:14:39,788 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-12 10:14:40,376 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 57 [2020-10-12 10:14:40,944 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 59 [2020-10-12 10:14:41,358 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2020-10-12 10:14:41,720 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-10-12 10:14:42,314 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2020-10-12 10:14:42,748 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2020-10-12 10:14:43,085 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-12 10:14:43,397 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-12 10:14:43,693 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-12 10:14:43,957 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 10:14:44,190 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-12 10:14:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:44,220 INFO L93 Difference]: Finished difference Result 164 states and 191 transitions. [2020-10-12 10:14:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 10:14:44,222 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 69 [2020-10-12 10:14:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:44,223 INFO L225 Difference]: With dead ends: 164 [2020-10-12 10:14:44,223 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 10:14:44,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1050, Invalid=6090, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 10:14:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 10:14:44,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-12 10:14:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-12 10:14:44,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2020-10-12 10:14:44,238 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 69 [2020-10-12 10:14:44,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:44,239 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2020-10-12 10:14:44,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 10:14:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2020-10-12 10:14:44,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 10:14:44,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:44,240 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 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 10:14:44,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:14:44,240 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash -135378511, now seen corresponding path program 22 times [2020-10-12 10:14:44,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:44,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304235776] [2020-10-12 10:14:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:44,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:45,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:46,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:47,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:48,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:49,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:49,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 10:14:49,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:14:49,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:14:49,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:49,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 10:14:49,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:49,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 10:14:49,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:50,303 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-12 10:14:50,597 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-12 10:14:50,853 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-12 10:14:51,110 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-12 10:14:51,697 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-12 10:14:51,899 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-12 10:14:52,487 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-12 10:14:53,264 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-12 10:14:55,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:55,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:55,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:55,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:55,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:55,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:55,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:55,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:55,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:55,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:55,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:55,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:55,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304235776] [2020-10-12 10:14:55,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:55,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 10:14:55,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483881212] [2020-10-12 10:14:55,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 10:14:55,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 10:14:55,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:14:55,400 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand 47 states. [2020-10-12 10:14:56,302 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-12 10:14:56,635 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-12 10:14:57,099 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-12 10:14:57,504 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-12 10:14:57,875 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-12 10:14:58,244 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2020-10-12 10:14:58,588 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2020-10-12 10:14:59,100 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 52 [2020-10-12 10:14:59,575 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-10-12 10:14:59,863 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-12 10:15:00,156 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-12 10:15:00,512 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 61 [2020-10-12 10:15:00,991 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 57 [2020-10-12 10:15:01,535 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 59 [2020-10-12 10:15:02,089 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 56 [2020-10-12 10:15:02,709 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 60 [2020-10-12 10:15:03,351 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 60 [2020-10-12 10:15:03,911 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2020-10-12 10:15:04,472 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2020-10-12 10:15:04,999 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2020-10-12 10:15:05,627 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2020-10-12 10:15:05,958 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-12 10:15:06,366 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-12 10:15:06,684 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-12 10:15:07,062 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-12 10:15:07,421 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-12 10:15:07,691 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-12 10:15:08,112 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-12 10:15:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:08,500 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2020-10-12 10:15:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:15:08,502 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 71 [2020-10-12 10:15:08,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:08,503 INFO L225 Difference]: With dead ends: 165 [2020-10-12 10:15:08,503 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 10:15:08,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=796, Invalid=5210, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 10:15:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 10:15:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-12 10:15:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 10:15:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2020-10-12 10:15:08,521 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 71 [2020-10-12 10:15:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:08,521 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2020-10-12 10:15:08,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 10:15:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2020-10-12 10:15:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 10:15:08,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:08,523 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 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 10:15:08,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:15:08,523 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash 780279225, now seen corresponding path program 23 times [2020-10-12 10:15:08,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:08,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480916442] [2020-10-12 10:15:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:08,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:08,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:08,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:09,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:09,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:09,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:09,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:10,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:11,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:11,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:12,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:13,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:13,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 10:15:13,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:15:13,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:15:13,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:13,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:15:13,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:13,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 10:15:13,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:15,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:15,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:15,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:15,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:15,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:15,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:15,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:15,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:15,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:15,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:15,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:15,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:15,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:15,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:15,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:15,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:15,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:15:15,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:15,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 84 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:15:15,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480916442] [2020-10-12 10:15:15,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:15,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:15:15,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741463381] [2020-10-12 10:15:15,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:15:15,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:15,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:15:15,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:15:15,726 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 36 states. [2020-10-12 10:15:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:19,545 INFO L93 Difference]: Finished difference Result 173 states and 191 transitions. [2020-10-12 10:15:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 10:15:19,547 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2020-10-12 10:15:19,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:19,549 INFO L225 Difference]: With dead ends: 173 [2020-10-12 10:15:19,549 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 10:15:19,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1143, Invalid=5019, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 10:15:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 10:15:19,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-10-12 10:15:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 10:15:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-12 10:15:19,560 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 74 [2020-10-12 10:15:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:19,560 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-12 10:15:19,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:15:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-12 10:15:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 10:15:19,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:19,562 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 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 10:15:19,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:15:19,562 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:19,562 INFO L82 PathProgramCache]: Analyzing trace with hash -443008137, now seen corresponding path program 24 times [2020-10-12 10:15:19,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:19,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100696372] [2020-10-12 10:15:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:19,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking...