/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:08:17,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:08:17,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:08:17,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:08:17,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:08:17,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:08:17,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:08:17,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:08:17,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:08:17,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:08:17,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:08:17,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:08:17,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:08:17,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:08:17,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:08:17,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:08:17,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:08:17,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:08:17,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:08:17,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:08:17,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:08:17,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:08:17,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:08:17,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:08:17,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:08:17,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:08:17,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:08:17,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:08:17,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:08:17,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:08:17,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:08:17,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:08:17,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:08:17,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:08:17,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:08:17,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:08:17,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:08:17,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:08:17,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:08:17,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:08:17,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:08:17,802 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 [2020-10-13 15:08:17,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:08:17,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:08:17,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:08:17,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:08:17,828 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:08:17,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:08:17,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:08:17,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:08:17,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:08:17,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:08:17,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:08:17,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:08:17,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:08:17,830 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:08:17,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:08:17,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:08:17,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:08:17,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:08:17,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:08:17,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:08:17,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:08:17,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:08:17,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:08:17,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:08:17,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:08:17,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:08:17,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:08:17,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:08:17,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:08:17,833 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 15:08:18,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:08:18,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:08:18,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:08:18,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:08:18,144 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:08:18,145 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:08:18,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa69f38f4/debcdce2761f4520867fc0db76804e07/FLAGd7deb3850 [2020-10-13 15:08:18,829 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:08:18,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:08:18,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa69f38f4/debcdce2761f4520867fc0db76804e07/FLAGd7deb3850 [2020-10-13 15:08:18,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa69f38f4/debcdce2761f4520867fc0db76804e07 [2020-10-13 15:08:18,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:08:19,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:08:19,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:08:19,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:08:19,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:08:19,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:08:18" (1/1) ... [2020-10-13 15:08:19,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f3e4b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:19, skipping insertion in model container [2020-10-13 15:08:19,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:08:18" (1/1) ... [2020-10-13 15:08:19,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:08:19,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:08:20,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:08:20,397 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:08:21,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:08:21,192 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:08:21,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:21 WrapperNode [2020-10-13 15:08:21,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:08:21,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:08:21,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:08:21,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:08:21,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:21" (1/1) ... [2020-10-13 15:08:21,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:21" (1/1) ... [2020-10-13 15:08:21,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:21" (1/1) ... [2020-10-13 15:08:21,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:21" (1/1) ... [2020-10-13 15:08:21,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:21" (1/1) ... [2020-10-13 15:08:21,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:21" (1/1) ... [2020-10-13 15:08:21,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:21" (1/1) ... [2020-10-13 15:08:21,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:08:21,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:08:21,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:08:21,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:08:21,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:21" (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 [2020-10-13 15:08:21,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:08:21,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:08:21,592 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 15:08:21,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:08:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:08:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 15:08:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 15:08:21,594 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 15:08:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 15:08:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 15:08:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 15:08:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 15:08:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 15:08:21,596 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 15:08:21,596 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 15:08:21,597 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 15:08:21,597 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 15:08:21,598 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 15:08:21,598 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 15:08:21,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:08:21,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:08:21,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:08:25,607 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:08:25,608 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 15:08:25,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:08:25 BoogieIcfgContainer [2020-10-13 15:08:25,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:08:25,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:08:25,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:08:25,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:08:25,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:08:18" (1/3) ... [2020-10-13 15:08:25,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1729d424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:08:25, skipping insertion in model container [2020-10-13 15:08:25,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:08:21" (2/3) ... [2020-10-13 15:08:25,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1729d424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:08:25, skipping insertion in model container [2020-10-13 15:08:25,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:08:25" (3/3) ... [2020-10-13 15:08:25,632 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:08:25,643 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:08:25,653 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:08:25,669 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:08:25,702 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:08:25,702 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:08:25,702 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:08:25,702 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:08:25,703 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:08:25,703 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:08:25,703 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:08:25,703 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:08:25,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states. [2020-10-13 15:08:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-13 15:08:25,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:08:25,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:08:25,793 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:08:25,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:08:25,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1604153631, now seen corresponding path program 1 times [2020-10-13 15:08:25,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:08:25,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850394186] [2020-10-13 15:08:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:08:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:27,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:28,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:28,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:29,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:29,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:30,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:30,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:31,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:31,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:31,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:31,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-13 15:08:31,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:08:31,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5191 [2020-10-13 15:08:31,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:31,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:08:31,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-10-13 15:08:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 15:08:31,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 15:08:33,060 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:08:33,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:08:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:33,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:33,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:33,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:08:33,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:08:33,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 15:08:33,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:33,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:08:33,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:08:33,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:08:33,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:08:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:08:33,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850394186] [2020-10-13 15:08:33,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:08:33,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:08:33,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710191883] [2020-10-13 15:08:33,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:08:33,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:08:33,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:08:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:08:33,585 INFO L87 Difference]: Start difference. First operand 1529 states. Second operand 4 states. [2020-10-13 15:08:34,520 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:08:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:08:49,070 INFO L93 Difference]: Finished difference Result 3131 states and 5457 transitions. [2020-10-13 15:08:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:08:49,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 376 [2020-10-13 15:08:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:08:49,133 INFO L225 Difference]: With dead ends: 3131 [2020-10-13 15:08:49,133 INFO L226 Difference]: Without dead ends: 2154 [2020-10-13 15:08:49,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:08:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2020-10-13 15:08:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2020-10-13 15:08:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2152 states. [2020-10-13 15:08:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3608 transitions. [2020-10-13 15:08:49,451 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3608 transitions. Word has length 376 [2020-10-13 15:08:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:08:49,456 INFO L479 AbstractCegarLoop]: Abstraction has 2152 states and 3608 transitions. [2020-10-13 15:08:49,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:08:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3608 transitions. [2020-10-13 15:08:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-13 15:08:49,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:08:49,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:08:49,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:08:49,483 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:08:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:08:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1338273836, now seen corresponding path program 1 times [2020-10-13 15:08:49,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:08:49,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169387601] [2020-10-13 15:08:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:08:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:49,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:50,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:50,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:51,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:51,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:52,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:52,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:52,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:53,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:53,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:53,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:54,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:54,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:54,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:54,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:54,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-13 15:08:54,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 15:08:54,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-13 15:08:54,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:08:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-13 15:08:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 15:08:54,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:08:55,757 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:08:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:08:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:55,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:55,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:55,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:08:55,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:08:55,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 15:08:55,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:08:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:08:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:08:55,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:08:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:08:56,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169387601] [2020-10-13 15:08:56,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:08:56,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:08:56,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899039601] [2020-10-13 15:08:56,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:08:56,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:08:56,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:08:56,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:08:56,018 INFO L87 Difference]: Start difference. First operand 2152 states and 3608 transitions. Second operand 4 states. [2020-10-13 15:08:57,149 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:09:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:09:11,335 INFO L93 Difference]: Finished difference Result 4680 states and 7747 transitions. [2020-10-13 15:09:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:09:11,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 376 [2020-10-13 15:09:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:09:11,356 INFO L225 Difference]: With dead ends: 4680 [2020-10-13 15:09:11,356 INFO L226 Difference]: Without dead ends: 3154 [2020-10-13 15:09:11,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:09:11,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2020-10-13 15:09:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 3152. [2020-10-13 15:09:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3152 states. [2020-10-13 15:09:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 5235 transitions. [2020-10-13 15:09:11,469 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 5235 transitions. Word has length 376 [2020-10-13 15:09:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:09:11,470 INFO L479 AbstractCegarLoop]: Abstraction has 3152 states and 5235 transitions. [2020-10-13 15:09:11,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:09:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 5235 transitions. [2020-10-13 15:09:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-13 15:09:11,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:09:11,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:09:11,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:09:11,482 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:09:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:09:11,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1669019191, now seen corresponding path program 1 times [2020-10-13 15:09:11,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:09:11,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585347558] [2020-10-13 15:09:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:09:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:11,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:12,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:12,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:12,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:13,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:13,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:13,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:13,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:14,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:14,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:14,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:14,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:15,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:15,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:15,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:15,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:16,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:16,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:16,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:16,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-13 15:09:16,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 15:09:16,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 15:09:16,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:16,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:09:16,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-10-13 15:09:16,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 15:09:16,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:17,688 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:09:17,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:09:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:17,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:17,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:17,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:09:17,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:09:17,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 15:09:17,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:17,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:09:17,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:09:17,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:09:17,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:09:17,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585347558] [2020-10-13 15:09:17,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:09:17,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:09:17,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537677612] [2020-10-13 15:09:17,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:09:17,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:09:17,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:09:17,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:09:17,958 INFO L87 Difference]: Start difference. First operand 3152 states and 5235 transitions. Second operand 4 states. [2020-10-13 15:09:18,750 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:09:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:09:29,454 INFO L93 Difference]: Finished difference Result 7286 states and 11973 transitions. [2020-10-13 15:09:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:09:29,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 376 [2020-10-13 15:09:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:09:29,476 INFO L225 Difference]: With dead ends: 7286 [2020-10-13 15:09:29,476 INFO L226 Difference]: Without dead ends: 4788 [2020-10-13 15:09:29,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:09:29,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2020-10-13 15:09:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 4786. [2020-10-13 15:09:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4786 states. [2020-10-13 15:09:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 7872 transitions. [2020-10-13 15:09:29,669 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 7872 transitions. Word has length 376 [2020-10-13 15:09:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:09:29,670 INFO L479 AbstractCegarLoop]: Abstraction has 4786 states and 7872 transitions. [2020-10-13 15:09:29,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:09:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 7872 transitions. [2020-10-13 15:09:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-13 15:09:29,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:09:29,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:09:29,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:09:29,696 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:09:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:09:29,697 INFO L82 PathProgramCache]: Analyzing trace with hash 359869633, now seen corresponding path program 1 times [2020-10-13 15:09:29,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:09:29,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666727773] [2020-10-13 15:09:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:09:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:30,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:30,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:30,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:31,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:31,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:31,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:32,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:32,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:32,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:32,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:33,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:33,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:33,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:33,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:34,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:34,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:34,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-13 15:09:34,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 15:09:34,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-13 15:09:34,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:34,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:09:34,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-13 15:09:34,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:09:34,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:09:36,291 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:09:36,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:09:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:36,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:36,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:36,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:09:36,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:09:36,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-13 15:09:36,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:36,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:09:36,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:09:36,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:09:36,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:09:36,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666727773] [2020-10-13 15:09:36,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:09:36,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:09:36,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480021375] [2020-10-13 15:09:36,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:09:36,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:09:36,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:09:36,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:09:36,565 INFO L87 Difference]: Start difference. First operand 4786 states and 7872 transitions. Second operand 4 states. [2020-10-13 15:09:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:09:46,280 INFO L93 Difference]: Finished difference Result 7090 states and 11702 transitions. [2020-10-13 15:09:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:09:46,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 376 [2020-10-13 15:09:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:09:46,297 INFO L225 Difference]: With dead ends: 7090 [2020-10-13 15:09:46,297 INFO L226 Difference]: Without dead ends: 3390 [2020-10-13 15:09:46,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:09:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3390 states. [2020-10-13 15:09:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3390 to 3388. [2020-10-13 15:09:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3388 states. [2020-10-13 15:09:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 5633 transitions. [2020-10-13 15:09:46,435 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 5633 transitions. Word has length 376 [2020-10-13 15:09:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:09:46,436 INFO L479 AbstractCegarLoop]: Abstraction has 3388 states and 5633 transitions. [2020-10-13 15:09:46,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:09:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 5633 transitions. [2020-10-13 15:09:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-13 15:09:46,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:09:46,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:09:46,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:09:46,450 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:09:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:09:46,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1232955505, now seen corresponding path program 1 times [2020-10-13 15:09:46,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:09:46,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020619778] [2020-10-13 15:09:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:09:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:46,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:47,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:47,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:47,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:47,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:48,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:48,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:48,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:48,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:49,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:49,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:49,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:49,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:49,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:50,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:51,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:51,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-13 15:09:51,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 15:09:51,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 15:09:51,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:51,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:09:51,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 247 [2020-10-13 15:09:51,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:09:51,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:52,653 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:09:52,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:09:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:52,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:52,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:52,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:09:52,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:09:52,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 15:09:52,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:09:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:09:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:09:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:09:52,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020619778] [2020-10-13 15:09:52,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:09:52,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:09:52,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289766206] [2020-10-13 15:09:52,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:09:52,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:09:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:09:52,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:09:52,913 INFO L87 Difference]: Start difference. First operand 3388 states and 5633 transitions. Second operand 4 states. [2020-10-13 15:09:53,681 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 402 [2020-10-13 15:10:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:10:06,941 INFO L93 Difference]: Finished difference Result 8626 states and 14197 transitions. [2020-10-13 15:10:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:10:06,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 376 [2020-10-13 15:10:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:10:06,969 INFO L225 Difference]: With dead ends: 8626 [2020-10-13 15:10:06,970 INFO L226 Difference]: Without dead ends: 5984 [2020-10-13 15:10:06,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:10:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5984 states. [2020-10-13 15:10:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5984 to 5540. [2020-10-13 15:10:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5540 states. [2020-10-13 15:10:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 9113 transitions. [2020-10-13 15:10:07,193 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 9113 transitions. Word has length 376 [2020-10-13 15:10:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:10:07,194 INFO L479 AbstractCegarLoop]: Abstraction has 5540 states and 9113 transitions. [2020-10-13 15:10:07,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:10:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 9113 transitions. [2020-10-13 15:10:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-13 15:10:07,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:10:07,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:10:07,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:10:07,208 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:10:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:10:07,209 INFO L82 PathProgramCache]: Analyzing trace with hash 316405635, now seen corresponding path program 1 times [2020-10-13 15:10:07,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:10:07,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630800230] [2020-10-13 15:10:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:10:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:07,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:07,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:07,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:08,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:08,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:08,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:08,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:08,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:08,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:09,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:09,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:09,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:09,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:09,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:09,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:12,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:12,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-13 15:10:12,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 15:10:12,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 15:10:12,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:12,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:10:12,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 201 [2020-10-13 15:10:12,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:10:12,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:13,214 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:10:13,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:10:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:13,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:13,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:13,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:10:13,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:10:13,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 15:10:13,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:13,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:10:13,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:10:13,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:10:13,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:10:13,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630800230] [2020-10-13 15:10:13,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:10:13,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:10:13,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041438455] [2020-10-13 15:10:13,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:10:13,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:10:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:10:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:10:13,379 INFO L87 Difference]: Start difference. First operand 5540 states and 9113 transitions. Second operand 4 states. [2020-10-13 15:10:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:10:22,820 INFO L93 Difference]: Finished difference Result 7356 states and 12121 transitions. [2020-10-13 15:10:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:10:22,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 376 [2020-10-13 15:10:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:10:22,834 INFO L225 Difference]: With dead ends: 7356 [2020-10-13 15:10:22,834 INFO L226 Difference]: Without dead ends: 3202 [2020-10-13 15:10:22,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:10:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2020-10-13 15:10:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 3200. [2020-10-13 15:10:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-13 15:10:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5281 transitions. [2020-10-13 15:10:22,966 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5281 transitions. Word has length 376 [2020-10-13 15:10:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:10:22,966 INFO L479 AbstractCegarLoop]: Abstraction has 3200 states and 5281 transitions. [2020-10-13 15:10:22,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:10:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5281 transitions. [2020-10-13 15:10:22,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-13 15:10:22,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:10:22,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:10:22,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:10:22,983 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:10:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:10:22,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1876850099, now seen corresponding path program 1 times [2020-10-13 15:10:22,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:10:22,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470826364] [2020-10-13 15:10:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:10:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:23,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:23,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:23,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:24,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:24,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:24,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:24,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:24,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:24,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:25,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:25,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:25,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:25,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:28,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:28,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-13 15:10:28,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 15:10:28,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 15:10:28,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:28,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:10:28,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 219 [2020-10-13 15:10:28,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-13 15:10:28,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:29,011 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:10:29,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:10:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:29,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:29,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:29,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:10:29,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:10:29,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 15:10:29,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:29,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:10:29,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:10:29,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:10:29,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:10:29,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470826364] [2020-10-13 15:10:29,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:10:29,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:10:29,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729153583] [2020-10-13 15:10:29,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:10:29,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:10:29,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:10:29,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:10:29,214 INFO L87 Difference]: Start difference. First operand 3200 states and 5281 transitions. Second operand 4 states. [2020-10-13 15:10:29,960 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-10-13 15:10:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:10:38,969 INFO L93 Difference]: Finished difference Result 5604 states and 9295 transitions. [2020-10-13 15:10:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:10:38,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 376 [2020-10-13 15:10:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:10:38,990 INFO L225 Difference]: With dead ends: 5604 [2020-10-13 15:10:38,990 INFO L226 Difference]: Without dead ends: 4466 [2020-10-13 15:10:38,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:10:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2020-10-13 15:10:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 4464. [2020-10-13 15:10:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-10-13 15:10:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 7365 transitions. [2020-10-13 15:10:39,177 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 7365 transitions. Word has length 376 [2020-10-13 15:10:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:10:39,180 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 7365 transitions. [2020-10-13 15:10:39,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:10:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 7365 transitions. [2020-10-13 15:10:39,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-13 15:10:39,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:10:39,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:10:39,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:10:39,193 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:10:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:10:39,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1265152412, now seen corresponding path program 1 times [2020-10-13 15:10:39,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:10:39,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863774119] [2020-10-13 15:10:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:10:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:39,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:39,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:39,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:39,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:40,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:40,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:40,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:40,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:41,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:41,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:41,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:41,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:41,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:42,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:44,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:44,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 383 [2020-10-13 15:10:44,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 15:10:44,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 15:10:44,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:10:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 220 [2020-10-13 15:10:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-13 15:10:44,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:45,219 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:10:45,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:10:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:45,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:45,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:45,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:10:45,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:10:45,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:10:45,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:45,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:10:45,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:10:45,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:10:45,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:10:45,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863774119] [2020-10-13 15:10:45,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:10:45,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:10:45,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420610730] [2020-10-13 15:10:45,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:10:45,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:10:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:10:45,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:10:45,374 INFO L87 Difference]: Start difference. First operand 4464 states and 7365 transitions. Second operand 4 states. [2020-10-13 15:10:46,155 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-10-13 15:10:55,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:10:55,515 INFO L93 Difference]: Finished difference Result 9056 states and 14993 transitions. [2020-10-13 15:10:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:10:55,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2020-10-13 15:10:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:10:55,532 INFO L225 Difference]: With dead ends: 9056 [2020-10-13 15:10:55,533 INFO L226 Difference]: Without dead ends: 6886 [2020-10-13 15:10:55,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:10:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6886 states. [2020-10-13 15:10:55,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6886 to 6876. [2020-10-13 15:10:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6876 states. [2020-10-13 15:10:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6876 states to 6876 states and 11343 transitions. [2020-10-13 15:10:55,857 INFO L78 Accepts]: Start accepts. Automaton has 6876 states and 11343 transitions. Word has length 377 [2020-10-13 15:10:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:10:55,858 INFO L479 AbstractCegarLoop]: Abstraction has 6876 states and 11343 transitions. [2020-10-13 15:10:55,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:10:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 6876 states and 11343 transitions. [2020-10-13 15:10:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-10-13 15:10:55,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:10:55,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:10:55,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:10:55,870 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:10:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:10:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash -17614949, now seen corresponding path program 1 times [2020-10-13 15:10:55,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:10:55,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347871527] [2020-10-13 15:10:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:10:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:56,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:56,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:56,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:57,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:57,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:57,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:57,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:57,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:57,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:58,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:58,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:58,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:58,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:58,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:58,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:01,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:01,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 384 [2020-10-13 15:11:01,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 15:11:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:11:01,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:11:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:11:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-13 15:11:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:01,979 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:11:01,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:11:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:01,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:02,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:02,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:11:02,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:11:02,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 15:11:02,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:11:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:11:02,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:11:02,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:11:02,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347871527] [2020-10-13 15:11:02,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:11:02,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:11:02,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161141031] [2020-10-13 15:11:02,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:11:02,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:11:02,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:11:02,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:11:02,188 INFO L87 Difference]: Start difference. First operand 6876 states and 11343 transitions. Second operand 5 states. [2020-10-13 15:11:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:11:15,873 INFO L93 Difference]: Finished difference Result 20464 states and 33756 transitions. [2020-10-13 15:11:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:11:15,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 378 [2020-10-13 15:11:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:11:15,902 INFO L225 Difference]: With dead ends: 20464 [2020-10-13 15:11:15,903 INFO L226 Difference]: Without dead ends: 13605 [2020-10-13 15:11:15,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:11:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13605 states. [2020-10-13 15:11:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13605 to 13603. [2020-10-13 15:11:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13603 states. [2020-10-13 15:11:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13603 states to 13603 states and 22380 transitions. [2020-10-13 15:11:16,453 INFO L78 Accepts]: Start accepts. Automaton has 13603 states and 22380 transitions. Word has length 378 [2020-10-13 15:11:16,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:11:16,454 INFO L479 AbstractCegarLoop]: Abstraction has 13603 states and 22380 transitions. [2020-10-13 15:11:16,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:11:16,454 INFO L276 IsEmpty]: Start isEmpty. Operand 13603 states and 22380 transitions. [2020-10-13 15:11:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-10-13 15:11:16,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:11:16,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:11:16,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:11:16,469 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:11:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:11:16,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1816481180, now seen corresponding path program 1 times [2020-10-13 15:11:16,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:11:16,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470040421] [2020-10-13 15:11:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:11:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:16,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:16,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:16,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:18,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:18,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:21,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:21,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 386 [2020-10-13 15:11:21,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:11:21,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-13 15:11:21,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:21,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:11:21,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:11:21,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-13 15:11:21,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:22,556 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:11:22,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:11:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:22,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:22,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:22,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:11:22,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:11:22,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 15:11:22,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:22,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:11:22,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:11:22,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:11:22,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:11:22,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470040421] [2020-10-13 15:11:22,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:11:22,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:11:22,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143520548] [2020-10-13 15:11:22,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:11:22,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:11:22,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:11:22,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:11:22,759 INFO L87 Difference]: Start difference. First operand 13603 states and 22380 transitions. Second operand 5 states. [2020-10-13 15:11:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:11:37,174 INFO L93 Difference]: Finished difference Result 40491 states and 66605 transitions. [2020-10-13 15:11:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:11:37,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 380 [2020-10-13 15:11:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:11:37,228 INFO L225 Difference]: With dead ends: 40491 [2020-10-13 15:11:37,229 INFO L226 Difference]: Without dead ends: 26906 [2020-10-13 15:11:37,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:11:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26906 states. [2020-10-13 15:11:38,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26906 to 26904. [2020-10-13 15:11:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26904 states. [2020-10-13 15:11:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 44122 transitions. [2020-10-13 15:11:38,459 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 44122 transitions. Word has length 380 [2020-10-13 15:11:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:11:38,460 INFO L479 AbstractCegarLoop]: Abstraction has 26904 states and 44122 transitions. [2020-10-13 15:11:38,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:11:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 44122 transitions. [2020-10-13 15:11:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-10-13 15:11:38,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:11:38,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:11:38,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:11:38,486 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:11:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:11:38,486 INFO L82 PathProgramCache]: Analyzing trace with hash -573518289, now seen corresponding path program 1 times [2020-10-13 15:11:38,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:11:38,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113057794] [2020-10-13 15:11:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:11:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:38,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:38,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:38,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:38,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:39,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:39,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:39,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:39,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:39,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:39,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:39,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:40,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:41,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:41,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:43,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:43,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 388 [2020-10-13 15:11:43,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:11:43,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:11:43,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:43,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:11:43,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-13 15:11:43,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 15:11:43,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:44,365 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:11:44,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:11:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:44,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:44,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:11:44,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:11:44,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:11:44,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:44,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:11:44,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:11:44,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:11:44,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:11:44,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113057794] [2020-10-13 15:11:44,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:11:44,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:11:44,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034362611] [2020-10-13 15:11:44,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:11:44,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:11:44,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:11:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:11:44,543 INFO L87 Difference]: Start difference. First operand 26904 states and 44122 transitions. Second operand 4 states. [2020-10-13 15:11:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:11:57,672 INFO L93 Difference]: Finished difference Result 62485 states and 102261 transitions. [2020-10-13 15:11:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:11:57,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 382 [2020-10-13 15:11:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:11:57,741 INFO L225 Difference]: With dead ends: 62485 [2020-10-13 15:11:57,741 INFO L226 Difference]: Without dead ends: 37690 [2020-10-13 15:11:57,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:11:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37690 states. [2020-10-13 15:11:58,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37690 to 27244. [2020-10-13 15:11:58,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27244 states. [2020-10-13 15:11:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27244 states to 27244 states and 44610 transitions. [2020-10-13 15:11:58,923 INFO L78 Accepts]: Start accepts. Automaton has 27244 states and 44610 transitions. Word has length 382 [2020-10-13 15:11:58,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:11:58,924 INFO L479 AbstractCegarLoop]: Abstraction has 27244 states and 44610 transitions. [2020-10-13 15:11:58,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:11:58,924 INFO L276 IsEmpty]: Start isEmpty. Operand 27244 states and 44610 transitions. [2020-10-13 15:11:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-10-13 15:11:58,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:11:58,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:11:58,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:11:58,942 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:11:58,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:11:58,943 INFO L82 PathProgramCache]: Analyzing trace with hash -219249700, now seen corresponding path program 1 times [2020-10-13 15:11:58,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:11:58,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526841837] [2020-10-13 15:11:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:11:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:59,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:59,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:59,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:59,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:59,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:59,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:00,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking...