/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:23:33,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:23:33,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:23:33,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:23:33,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:23:33,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:23:33,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:23:33,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:23:33,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:23:33,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:23:33,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:23:33,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:23:33,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:23:33,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:23:33,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:23:33,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:23:33,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:23:33,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:23:33,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:23:33,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:23:33,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:23:33,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:23:33,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:23:33,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:23:33,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:23:33,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:23:33,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:23:33,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:23:33,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:23:33,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:23:33,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:23:33,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:23:33,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:23:33,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:23:33,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:23:33,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:23:33,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:23:33,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:23:33,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:23:33,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:23:33,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:23:33,798 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 [2020-10-14 09:23:33,836 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:23:33,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:23:33,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:23:33,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:23:33,838 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:23:33,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:23:33,839 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:23:33,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:23:33,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:23:33,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:23:33,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:23:33,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:23:33,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:23:33,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:23:33,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:23:33,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:23:33,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:23:33,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:23:33,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:23:33,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:23:33,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:23:33,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:23:33,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:23:33,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:23:33,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:23:33,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:23:33,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:23:33,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:23:33,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:23:33,844 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:23:34,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:23:34,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:23:34,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:23:34,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:23:34,256 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:23:34,257 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:23:34,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34a361ddf/629b3c4aca7d419babf2daa4024cee69/FLAG91d124f24 [2020-10-14 09:23:34,853 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:23:34,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:23:34,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34a361ddf/629b3c4aca7d419babf2daa4024cee69/FLAG91d124f24 [2020-10-14 09:23:35,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34a361ddf/629b3c4aca7d419babf2daa4024cee69 [2020-10-14 09:23:35,194 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:23:35,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:23:35,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:23:35,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:23:35,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:23:35,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:23:35" (1/1) ... [2020-10-14 09:23:35,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75a18185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35, skipping insertion in model container [2020-10-14 09:23:35,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:23:35" (1/1) ... [2020-10-14 09:23:35,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:23:35,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:23:35,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:23:35,821 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:23:35,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:23:35,930 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:23:35,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35 WrapperNode [2020-10-14 09:23:35,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:23:35,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:23:35,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:23:35,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:23:35,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35" (1/1) ... [2020-10-14 09:23:35,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35" (1/1) ... [2020-10-14 09:23:35,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35" (1/1) ... [2020-10-14 09:23:35,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35" (1/1) ... [2020-10-14 09:23:35,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35" (1/1) ... [2020-10-14 09:23:35,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35" (1/1) ... [2020-10-14 09:23:35,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35" (1/1) ... [2020-10-14 09:23:35,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:23:35,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:23:35,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:23:35,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:23:36,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35" (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 [2020-10-14 09:23:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:23:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:23:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:23:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:23:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:23:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:23:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 09:23:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:23:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:23:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:23:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:23:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:23:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:23:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:23:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:23:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:23:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:23:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:23:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:23:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:23:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:23:36,804 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:23:36,805 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:23:36,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:23:36 BoogieIcfgContainer [2020-10-14 09:23:36,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:23:36,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:23:36,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:23:36,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:23:36,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:23:35" (1/3) ... [2020-10-14 09:23:36,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d01b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:23:36, skipping insertion in model container [2020-10-14 09:23:36,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:35" (2/3) ... [2020-10-14 09:23:36,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d01b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:23:36, skipping insertion in model container [2020-10-14 09:23:36,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:23:36" (3/3) ... [2020-10-14 09:23:36,819 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:23:36,830 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:23:36,838 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:23:36,853 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:23:36,879 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:23:36,880 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:23:36,880 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:23:36,880 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:23:36,880 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:23:36,881 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:23:36,881 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:23:36,881 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:23:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-14 09:23:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 09:23:36,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:36,915 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] [2020-10-14 09:23:36,916 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:36,922 INFO L82 PathProgramCache]: Analyzing trace with hash -657204914, now seen corresponding path program 1 times [2020-10-14 09:23:36,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:36,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054948614] [2020-10-14 09:23:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:37,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:37,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:37,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:39,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:39,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 09:23:39,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:23:39,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2186 [2020-10-14 09:23:39,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:39,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:39,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:39,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:23:39,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:23:39,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 09:23:39,829 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:23:39,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:39,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:39,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:39,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:39,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:39,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:23:39,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:39,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:39,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:39,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:23:39,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054948614] [2020-10-14 09:23:39,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:39,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:39,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504530845] [2020-10-14 09:23:39,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:39,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:39,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:39,918 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 4 states. [2020-10-14 09:23:40,232 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:23:41,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:41,074 INFO L93 Difference]: Finished difference Result 344 states and 570 transitions. [2020-10-14 09:23:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:41,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-14 09:23:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:41,093 INFO L225 Difference]: With dead ends: 344 [2020-10-14 09:23:41,093 INFO L226 Difference]: Without dead ends: 237 [2020-10-14 09:23:41,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:23:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-14 09:23:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-10-14 09:23:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-14 09:23:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 371 transitions. [2020-10-14 09:23:41,170 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 371 transitions. Word has length 60 [2020-10-14 09:23:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:41,170 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 371 transitions. [2020-10-14 09:23:41,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 371 transitions. [2020-10-14 09:23:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 09:23:41,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:41,174 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] [2020-10-14 09:23:41,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:23:41,175 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:41,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:41,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1001716241, now seen corresponding path program 1 times [2020-10-14 09:23:41,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:41,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546420007] [2020-10-14 09:23:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:41,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:41,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:41,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:41,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:42,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:45,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:45,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 09:23:45,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:23:45,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4311 [2020-10-14 09:23:45,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:45,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 09:23:45,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:23:45,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:45,775 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:23:45,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:45,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:45,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:45,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:45,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:45,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:23:45,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:45,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:45,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:45,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:45,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:45,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:23:45,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546420007] [2020-10-14 09:23:45,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:45,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:45,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309733957] [2020-10-14 09:23:45,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:45,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:45,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:45,817 INFO L87 Difference]: Start difference. First operand 234 states and 371 transitions. Second operand 4 states. [2020-10-14 09:23:46,055 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:23:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:46,707 INFO L93 Difference]: Finished difference Result 576 states and 939 transitions. [2020-10-14 09:23:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:46,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-14 09:23:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:46,712 INFO L225 Difference]: With dead ends: 576 [2020-10-14 09:23:46,712 INFO L226 Difference]: Without dead ends: 397 [2020-10-14 09:23:46,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:23:46,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-14 09:23:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2020-10-14 09:23:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-14 09:23:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 634 transitions. [2020-10-14 09:23:46,747 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 634 transitions. Word has length 62 [2020-10-14 09:23:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:46,748 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 634 transitions. [2020-10-14 09:23:46,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 634 transitions. [2020-10-14 09:23:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 09:23:46,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:46,751 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] [2020-10-14 09:23:46,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:23:46,752 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:46,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1413596080, now seen corresponding path program 1 times [2020-10-14 09:23:46,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:46,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467217497] [2020-10-14 09:23:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:46,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:46,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:47,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:48,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:48,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:51,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:51,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 09:23:51,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:23:51,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 09:23:51,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:51,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:51,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:51,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 09:23:51,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:23:51,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:52,018 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:23:52,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:52,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:52,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:52,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:52,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:52,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:23:52,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:52,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:52,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:23:52,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467217497] [2020-10-14 09:23:52,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:52,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:52,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853343647] [2020-10-14 09:23:52,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:52,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:52,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:52,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:52,056 INFO L87 Difference]: Start difference. First operand 393 states and 634 transitions. Second operand 4 states. [2020-10-14 09:23:52,258 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:23:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:52,948 INFO L93 Difference]: Finished difference Result 1029 states and 1684 transitions. [2020-10-14 09:23:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:52,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-14 09:23:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:52,954 INFO L225 Difference]: With dead ends: 1029 [2020-10-14 09:23:52,954 INFO L226 Difference]: Without dead ends: 691 [2020-10-14 09:23:52,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:23:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-10-14 09:23:52,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 685. [2020-10-14 09:23:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2020-10-14 09:23:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1094 transitions. [2020-10-14 09:23:52,995 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1094 transitions. Word has length 64 [2020-10-14 09:23:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:52,995 INFO L479 AbstractCegarLoop]: Abstraction has 685 states and 1094 transitions. [2020-10-14 09:23:52,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1094 transitions. [2020-10-14 09:23:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:23:52,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:52,999 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] [2020-10-14 09:23:52,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:23:53,000 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:53,000 INFO L82 PathProgramCache]: Analyzing trace with hash 583898673, now seen corresponding path program 1 times [2020-10-14 09:23:53,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:53,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858044728] [2020-10-14 09:23:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:53,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:53,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:53,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:53,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:53,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:55,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:55,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:58,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:58,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:23:58,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:23:58,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 09:23:58,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:58,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:58,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:23:58,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:23:58,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 09:23:58,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:58,316 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:23:58,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:58,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:58,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:58,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:58,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:58,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:23:58,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:58,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:58,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:58,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:58,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:58,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:23:58,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858044728] [2020-10-14 09:23:58,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:58,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:23:58,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569600223] [2020-10-14 09:23:58,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:23:58,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:58,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:23:58,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:23:58,357 INFO L87 Difference]: Start difference. First operand 685 states and 1094 transitions. Second operand 5 states. [2020-10-14 09:23:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:59,192 INFO L93 Difference]: Finished difference Result 1974 states and 3152 transitions. [2020-10-14 09:23:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:59,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-14 09:23:59,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:59,200 INFO L225 Difference]: With dead ends: 1974 [2020-10-14 09:23:59,200 INFO L226 Difference]: Without dead ends: 1314 [2020-10-14 09:23:59,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:23:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2020-10-14 09:23:59,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1312. [2020-10-14 09:23:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1312 states. [2020-10-14 09:23:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 2083 transitions. [2020-10-14 09:23:59,273 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 2083 transitions. Word has length 66 [2020-10-14 09:23:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:59,273 INFO L479 AbstractCegarLoop]: Abstraction has 1312 states and 2083 transitions. [2020-10-14 09:23:59,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:23:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 2083 transitions. [2020-10-14 09:23:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:23:59,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:59,277 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] [2020-10-14 09:23:59,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:23:59,277 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:59,278 INFO L82 PathProgramCache]: Analyzing trace with hash 351674288, now seen corresponding path program 1 times [2020-10-14 09:23:59,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:59,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595910601] [2020-10-14 09:23:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:59,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:59,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:59,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:59,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:59,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:59,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:01,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:04,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:04,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:24:04,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:24:04,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 09:24:04,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:04,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:04,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:04,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:24:04,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:24:04,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:04,564 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:04,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:04,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:04,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:04,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:04,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:04,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:24:04,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:04,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:04,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:04,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:04,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595910601] [2020-10-14 09:24:04,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:04,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:04,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305259355] [2020-10-14 09:24:04,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:04,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:04,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:04,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:04,612 INFO L87 Difference]: Start difference. First operand 1312 states and 2083 transitions. Second operand 4 states. [2020-10-14 09:24:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:05,436 INFO L93 Difference]: Finished difference Result 3823 states and 6082 transitions. [2020-10-14 09:24:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:05,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:24:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:05,457 INFO L225 Difference]: With dead ends: 3823 [2020-10-14 09:24:05,457 INFO L226 Difference]: Without dead ends: 2583 [2020-10-14 09:24:05,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2020-10-14 09:24:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1315. [2020-10-14 09:24:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1315 states. [2020-10-14 09:24:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 2087 transitions. [2020-10-14 09:24:05,615 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 2087 transitions. Word has length 67 [2020-10-14 09:24:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:05,615 INFO L479 AbstractCegarLoop]: Abstraction has 1315 states and 2087 transitions. [2020-10-14 09:24:05,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 2087 transitions. [2020-10-14 09:24:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:24:05,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:05,620 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] [2020-10-14 09:24:05,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:24:05,620 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1400958329, now seen corresponding path program 1 times [2020-10-14 09:24:05,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:05,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981456164] [2020-10-14 09:24:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:05,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:05,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:05,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:05,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:06,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:08,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:10,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:10,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:24:10,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:24:10,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:24:10,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:10,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:10,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:10,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 09:24:10,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:24:10,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:10,925 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:10,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:10,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:10,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:10,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:10,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:10,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:24:10,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:10,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:10,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:10,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:10,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:10,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:10,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981456164] [2020-10-14 09:24:10,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:10,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:10,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184583652] [2020-10-14 09:24:10,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:10,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:10,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:10,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:10,971 INFO L87 Difference]: Start difference. First operand 1315 states and 2087 transitions. Second operand 4 states. [2020-10-14 09:24:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:11,876 INFO L93 Difference]: Finished difference Result 3101 states and 4979 transitions. [2020-10-14 09:24:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:11,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:24:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:11,889 INFO L225 Difference]: With dead ends: 3101 [2020-10-14 09:24:11,889 INFO L226 Difference]: Without dead ends: 1887 [2020-10-14 09:24:11,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2020-10-14 09:24:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1829. [2020-10-14 09:24:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1829 states. [2020-10-14 09:24:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2901 transitions. [2020-10-14 09:24:12,013 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2901 transitions. Word has length 67 [2020-10-14 09:24:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:12,014 INFO L479 AbstractCegarLoop]: Abstraction has 1829 states and 2901 transitions. [2020-10-14 09:24:12,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2901 transitions. [2020-10-14 09:24:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:24:12,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:12,017 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] [2020-10-14 09:24:12,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:24:12,017 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:12,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1618538354, now seen corresponding path program 1 times [2020-10-14 09:24:12,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:12,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685118300] [2020-10-14 09:24:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:12,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:12,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:12,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:12,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:12,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:15,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:15,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:24:15,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:24:15,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3305 [2020-10-14 09:24:15,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:15,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:15,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:24:15,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:24:15,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 09:24:15,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:15,687 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:15,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:15,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:15,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:15,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:15,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:15,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:24:15,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:15,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:15,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:15,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:15,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685118300] [2020-10-14 09:24:15,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:15,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:24:15,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852750709] [2020-10-14 09:24:15,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:24:15,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:15,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:24:15,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:24:15,737 INFO L87 Difference]: Start difference. First operand 1829 states and 2901 transitions. Second operand 5 states. [2020-10-14 09:24:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:16,832 INFO L93 Difference]: Finished difference Result 5239 states and 8335 transitions. [2020-10-14 09:24:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:16,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-14 09:24:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:16,852 INFO L225 Difference]: With dead ends: 5239 [2020-10-14 09:24:16,852 INFO L226 Difference]: Without dead ends: 3511 [2020-10-14 09:24:16,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:24:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2020-10-14 09:24:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 3509. [2020-10-14 09:24:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3509 states. [2020-10-14 09:24:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 5531 transitions. [2020-10-14 09:24:17,104 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 5531 transitions. Word has length 68 [2020-10-14 09:24:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:17,104 INFO L479 AbstractCegarLoop]: Abstraction has 3509 states and 5531 transitions. [2020-10-14 09:24:17,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:24:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 5531 transitions. [2020-10-14 09:24:17,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 09:24:17,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:17,107 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] [2020-10-14 09:24:17,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:24:17,108 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:17,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:17,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1533072686, now seen corresponding path program 1 times [2020-10-14 09:24:17,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:17,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415543999] [2020-10-14 09:24:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:17,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:17,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:17,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:17,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:18,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:19,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:19,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 09:24:19,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:24:19,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2834 [2020-10-14 09:24:19,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:19,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:19,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:19,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:24:19,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 09:24:19,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:20,168 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:20,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:20,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:20,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:20,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:20,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:20,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:24:20,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:20,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:20,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:20,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:20,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:20,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:20,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415543999] [2020-10-14 09:24:20,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:20,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:20,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510644095] [2020-10-14 09:24:20,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:20,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:20,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:20,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:20,201 INFO L87 Difference]: Start difference. First operand 3509 states and 5531 transitions. Second operand 4 states. [2020-10-14 09:24:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:21,148 INFO L93 Difference]: Finished difference Result 8385 states and 13333 transitions. [2020-10-14 09:24:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:21,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-14 09:24:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:21,177 INFO L225 Difference]: With dead ends: 8385 [2020-10-14 09:24:21,177 INFO L226 Difference]: Without dead ends: 5059 [2020-10-14 09:24:21,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2020-10-14 09:24:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 4901. [2020-10-14 09:24:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4901 states. [2020-10-14 09:24:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4901 states to 4901 states and 7707 transitions. [2020-10-14 09:24:21,677 INFO L78 Accepts]: Start accepts. Automaton has 4901 states and 7707 transitions. Word has length 69 [2020-10-14 09:24:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:21,677 INFO L479 AbstractCegarLoop]: Abstraction has 4901 states and 7707 transitions. [2020-10-14 09:24:21,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4901 states and 7707 transitions. [2020-10-14 09:24:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 09:24:21,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:21,680 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] [2020-10-14 09:24:21,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:24:21,681 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:21,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1650264337, now seen corresponding path program 1 times [2020-10-14 09:24:21,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:21,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872998463] [2020-10-14 09:24:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:21,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:21,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:21,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:21,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:22,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:23,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:23,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 09:24:23,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:24:23,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-10-14 09:24:23,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:23,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:23,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:24:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:24:23,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:23,465 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:23,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:23,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:23,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:23,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:23,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:23,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:24:23,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:23,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:23,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:23,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:23,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:23,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:23,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872998463] [2020-10-14 09:24:23,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:23,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:23,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388047363] [2020-10-14 09:24:23,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:23,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:23,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:23,494 INFO L87 Difference]: Start difference. First operand 4901 states and 7707 transitions. Second operand 4 states. [2020-10-14 09:24:24,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:24,708 INFO L93 Difference]: Finished difference Result 14621 states and 22985 transitions. [2020-10-14 09:24:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:24,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-14 09:24:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:24,761 INFO L225 Difference]: With dead ends: 14621 [2020-10-14 09:24:24,761 INFO L226 Difference]: Without dead ends: 9767 [2020-10-14 09:24:24,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:24,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2020-10-14 09:24:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 4913. [2020-10-14 09:24:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4913 states. [2020-10-14 09:24:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 7723 transitions. [2020-10-14 09:24:25,163 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 7723 transitions. Word has length 69 [2020-10-14 09:24:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:25,163 INFO L479 AbstractCegarLoop]: Abstraction has 4913 states and 7723 transitions. [2020-10-14 09:24:25,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 7723 transitions. [2020-10-14 09:24:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:24:25,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:25,166 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] [2020-10-14 09:24:25,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:24:25,167 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:25,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1370973855, now seen corresponding path program 1 times [2020-10-14 09:24:25,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:25,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790844835] [2020-10-14 09:24:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:25,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:25,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:25,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:25,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:25,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:25,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:26,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:26,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:24:26,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:24:26,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1672 [2020-10-14 09:24:26,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:26,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:26,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:26,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:24:26,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 09:24:26,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:27,053 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:27,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:27,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:27,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:27,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:27,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:27,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:24:27,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:27,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:27,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:27,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790844835] [2020-10-14 09:24:27,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:27,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:27,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130511697] [2020-10-14 09:24:27,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:27,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:27,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:27,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:27,084 INFO L87 Difference]: Start difference. First operand 4913 states and 7723 transitions. Second operand 4 states. [2020-10-14 09:24:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:28,505 INFO L93 Difference]: Finished difference Result 14101 states and 22205 transitions. [2020-10-14 09:24:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:28,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 09:24:28,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:28,533 INFO L225 Difference]: With dead ends: 14101 [2020-10-14 09:24:28,533 INFO L226 Difference]: Without dead ends: 9383 [2020-10-14 09:24:28,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9383 states. [2020-10-14 09:24:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9383 to 9381. [2020-10-14 09:24:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9381 states. [2020-10-14 09:24:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9381 states to 9381 states and 14631 transitions. [2020-10-14 09:24:29,308 INFO L78 Accepts]: Start accepts. Automaton has 9381 states and 14631 transitions. Word has length 70 [2020-10-14 09:24:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:29,309 INFO L479 AbstractCegarLoop]: Abstraction has 9381 states and 14631 transitions. [2020-10-14 09:24:29,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 9381 states and 14631 transitions. [2020-10-14 09:24:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:24:29,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:29,313 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] [2020-10-14 09:24:29,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:24:29,313 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:29,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:29,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1431985980, now seen corresponding path program 1 times [2020-10-14 09:24:29,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:29,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12181594] [2020-10-14 09:24:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:29,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:29,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:29,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:29,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:29,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:29,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:31,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:31,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:24:31,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:24:31,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-10-14 09:24:31,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:31,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:31,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:24:31,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:24:31,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 09:24:31,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:31,246 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:31,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:31,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:31,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:31,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:31,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:31,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:24:31,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:31,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:31,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:31,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:31,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:31,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:31,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12181594] [2020-10-14 09:24:31,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:31,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:24:31,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063001983] [2020-10-14 09:24:31,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:24:31,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:31,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:24:31,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:24:31,281 INFO L87 Difference]: Start difference. First operand 9381 states and 14631 transitions. Second operand 5 states. [2020-10-14 09:24:32,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:32,914 INFO L93 Difference]: Finished difference Result 25853 states and 40409 transitions. [2020-10-14 09:24:32,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:32,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 09:24:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:32,953 INFO L225 Difference]: With dead ends: 25853 [2020-10-14 09:24:32,953 INFO L226 Difference]: Without dead ends: 16691 [2020-10-14 09:24:32,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:24:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16691 states. [2020-10-14 09:24:34,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16691 to 16689. [2020-10-14 09:24:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16689 states. [2020-10-14 09:24:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16689 states to 16689 states and 25843 transitions. [2020-10-14 09:24:34,465 INFO L78 Accepts]: Start accepts. Automaton has 16689 states and 25843 transitions. Word has length 70 [2020-10-14 09:24:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:34,465 INFO L479 AbstractCegarLoop]: Abstraction has 16689 states and 25843 transitions. [2020-10-14 09:24:34,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:24:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 16689 states and 25843 transitions. [2020-10-14 09:24:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:24:34,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:34,471 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] [2020-10-14 09:24:34,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:24:34,472 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:34,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1518429261, now seen corresponding path program 1 times [2020-10-14 09:24:34,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:34,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142194440] [2020-10-14 09:24:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:34,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:34,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:35,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:35,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:24:35,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:24:35,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-14 09:24:35,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:35,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:24:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:24:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 09:24:35,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:35,281 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:35,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:35,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:35,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:35,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:35,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:35,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:24:35,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:35,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:35,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:35,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:35,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:35,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:35,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142194440] [2020-10-14 09:24:35,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:35,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:24:35,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147912818] [2020-10-14 09:24:35,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:24:35,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:35,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:24:35,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:24:35,305 INFO L87 Difference]: Start difference. First operand 16689 states and 25843 transitions. Second operand 5 states. [2020-10-14 09:24:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:36,968 INFO L93 Difference]: Finished difference Result 35122 states and 54350 transitions. [2020-10-14 09:24:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:36,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 09:24:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:37,013 INFO L225 Difference]: With dead ends: 35122 [2020-10-14 09:24:37,014 INFO L226 Difference]: Without dead ends: 18446 [2020-10-14 09:24:37,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:24:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18446 states. [2020-10-14 09:24:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18446 to 16822. [2020-10-14 09:24:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16822 states. [2020-10-14 09:24:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16822 states to 16822 states and 25988 transitions. [2020-10-14 09:24:38,197 INFO L78 Accepts]: Start accepts. Automaton has 16822 states and 25988 transitions. Word has length 70 [2020-10-14 09:24:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:38,197 INFO L479 AbstractCegarLoop]: Abstraction has 16822 states and 25988 transitions. [2020-10-14 09:24:38,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:24:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 16822 states and 25988 transitions. [2020-10-14 09:24:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 09:24:38,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:38,205 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] [2020-10-14 09:24:38,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:24:38,206 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash 123601329, now seen corresponding path program 1 times [2020-10-14 09:24:38,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:38,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617454985] [2020-10-14 09:24:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:38,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:38,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:38,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:38,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:38,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 09:24:38,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:24:38,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-14 09:24:38,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:38,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:38,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:38,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:24:38,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 09:24:38,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:38,850 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:38,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:38,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:38,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:38,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:38,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:38,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:24:38,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:38,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:38,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:38,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:38,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:38,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:38,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617454985] [2020-10-14 09:24:38,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:38,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:38,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125557638] [2020-10-14 09:24:38,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:38,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:38,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:38,873 INFO L87 Difference]: Start difference. First operand 16822 states and 25988 transitions. Second operand 4 states. [2020-10-14 09:24:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:40,969 INFO L93 Difference]: Finished difference Result 40664 states and 63640 transitions. [2020-10-14 09:24:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:40,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 09:24:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:41,011 INFO L225 Difference]: With dead ends: 40664 [2020-10-14 09:24:41,012 INFO L226 Difference]: Without dead ends: 24442 [2020-10-14 09:24:41,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24442 states. [2020-10-14 09:24:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24442 to 23576. [2020-10-14 09:24:42,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23576 states. [2020-10-14 09:24:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23576 states to 23576 states and 36554 transitions. [2020-10-14 09:24:42,655 INFO L78 Accepts]: Start accepts. Automaton has 23576 states and 36554 transitions. Word has length 71 [2020-10-14 09:24:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:42,655 INFO L479 AbstractCegarLoop]: Abstraction has 23576 states and 36554 transitions. [2020-10-14 09:24:42,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 23576 states and 36554 transitions. [2020-10-14 09:24:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 09:24:42,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:42,663 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] [2020-10-14 09:24:42,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:24:42,663 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash 209982254, now seen corresponding path program 1 times [2020-10-14 09:24:42,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:42,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180080935] [2020-10-14 09:24:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:42,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:42,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:42,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:43,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:43,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 09:24:43,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:24:43,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-14 09:24:43,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:43,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:43,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:24:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:24:43,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:43,219 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:43,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:43,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:43,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:43,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:43,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:43,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:24:43,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:43,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:43,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:43,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180080935] [2020-10-14 09:24:43,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:43,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:43,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879993996] [2020-10-14 09:24:43,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:43,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:43,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:43,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:43,241 INFO L87 Difference]: Start difference. First operand 23576 states and 36554 transitions. Second operand 4 states. [2020-10-14 09:24:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:47,209 INFO L93 Difference]: Finished difference Result 70486 states and 109358 transitions. [2020-10-14 09:24:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:47,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 09:24:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:47,289 INFO L225 Difference]: With dead ends: 70486 [2020-10-14 09:24:47,290 INFO L226 Difference]: Without dead ends: 47105 [2020-10-14 09:24:47,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47105 states. [2020-10-14 09:24:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47105 to 23579. [2020-10-14 09:24:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23579 states. [2020-10-14 09:24:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23579 states to 23579 states and 36558 transitions. [2020-10-14 09:24:49,041 INFO L78 Accepts]: Start accepts. Automaton has 23579 states and 36558 transitions. Word has length 71 [2020-10-14 09:24:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:49,041 INFO L479 AbstractCegarLoop]: Abstraction has 23579 states and 36558 transitions. [2020-10-14 09:24:49,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 23579 states and 36558 transitions. [2020-10-14 09:24:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 09:24:49,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:49,048 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] [2020-10-14 09:24:49,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:24:49,048 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:49,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1929997044, now seen corresponding path program 1 times [2020-10-14 09:24:49,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:49,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791502235] [2020-10-14 09:24:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:49,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:49,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:49,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 09:24:49,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:49,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-14 09:24:49,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:49,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:49,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:24:49,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-14 09:24:49,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:24:49,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:49,391 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:49,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:49,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:49,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:49,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:49,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:49,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:24:49,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:49,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:49,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:49,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:49,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:24:49,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791502235] [2020-10-14 09:24:49,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:49,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:24:49,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911027855] [2020-10-14 09:24:49,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:24:49,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:24:49,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:24:49,415 INFO L87 Difference]: Start difference. First operand 23579 states and 36558 transitions. Second operand 6 states. [2020-10-14 09:24:49,633 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:24:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:57,158 INFO L93 Difference]: Finished difference Result 122131 states and 192602 transitions. [2020-10-14 09:24:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:24:57,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-14 09:24:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:57,312 INFO L225 Difference]: With dead ends: 122131 [2020-10-14 09:24:57,313 INFO L226 Difference]: Without dead ends: 99155 [2020-10-14 09:24:57,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:24:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99155 states. [2020-10-14 09:25:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99155 to 45225. [2020-10-14 09:25:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45225 states. [2020-10-14 09:25:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45225 states to 45225 states and 69964 transitions. [2020-10-14 09:25:00,655 INFO L78 Accepts]: Start accepts. Automaton has 45225 states and 69964 transitions. Word has length 72 [2020-10-14 09:25:00,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:00,655 INFO L479 AbstractCegarLoop]: Abstraction has 45225 states and 69964 transitions. [2020-10-14 09:25:00,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:25:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 45225 states and 69964 transitions. [2020-10-14 09:25:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:25:00,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:00,662 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] [2020-10-14 09:25:00,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:25:00,662 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:00,663 INFO L82 PathProgramCache]: Analyzing trace with hash -361244235, now seen corresponding path program 1 times [2020-10-14 09:25:00,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:00,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344347588] [2020-10-14 09:25:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:00,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:00,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:01,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:01,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:25:01,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:25:01,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-14 09:25:01,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:01,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:01,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:25:01,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-14 09:25:01,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:25:01,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:01,215 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:01,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:01,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:01,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:01,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:01,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:01,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:25:01,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:01,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:01,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:01,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:01,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:01,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:01,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344347588] [2020-10-14 09:25:01,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:01,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:25:01,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832824664] [2020-10-14 09:25:01,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:25:01,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:01,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:25:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:01,240 INFO L87 Difference]: Start difference. First operand 45225 states and 69964 transitions. Second operand 5 states. [2020-10-14 09:25:01,446 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:25:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:10,315 INFO L93 Difference]: Finished difference Result 148459 states and 232411 transitions. [2020-10-14 09:25:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:25:10,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-14 09:25:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:10,472 INFO L225 Difference]: With dead ends: 148459 [2020-10-14 09:25:10,472 INFO L226 Difference]: Without dead ends: 103837 [2020-10-14 09:25:10,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:25:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103837 states. [2020-10-14 09:25:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103837 to 74281. [2020-10-14 09:25:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74281 states. [2020-10-14 09:25:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74281 states to 74281 states and 115312 transitions. [2020-10-14 09:25:15,613 INFO L78 Accepts]: Start accepts. Automaton has 74281 states and 115312 transitions. Word has length 73 [2020-10-14 09:25:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:15,613 INFO L479 AbstractCegarLoop]: Abstraction has 74281 states and 115312 transitions. [2020-10-14 09:25:15,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:25:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 74281 states and 115312 transitions. [2020-10-14 09:25:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:25:15,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:15,622 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] [2020-10-14 09:25:15,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:25:15,622 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:15,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1054047952, now seen corresponding path program 1 times [2020-10-14 09:25:15,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:15,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392923504] [2020-10-14 09:25:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:15,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:15,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:15,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:16,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:16,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:25:16,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:25:16,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-14 09:25:16,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:16,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:16,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:16,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 09:25:16,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 09:25:16,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:16,577 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:16,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:16,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:16,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:16,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:16,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:16,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:25:16,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:16,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:16,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392923504] [2020-10-14 09:25:16,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:16,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:16,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945684037] [2020-10-14 09:25:16,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:16,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:16,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:16,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:16,623 INFO L87 Difference]: Start difference. First operand 74281 states and 115312 transitions. Second operand 4 states. [2020-10-14 09:25:17,179 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:25:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:25,573 INFO L93 Difference]: Finished difference Result 146353 states and 228386 transitions. [2020-10-14 09:25:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:25,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-14 09:25:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:25,717 INFO L225 Difference]: With dead ends: 146353 [2020-10-14 09:25:25,718 INFO L226 Difference]: Without dead ends: 96859 [2020-10-14 09:25:25,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96859 states. [2020-10-14 09:25:32,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96859 to 96857. [2020-10-14 09:25:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96857 states. [2020-10-14 09:25:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96857 states to 96857 states and 150264 transitions. [2020-10-14 09:25:32,564 INFO L78 Accepts]: Start accepts. Automaton has 96857 states and 150264 transitions. Word has length 74 [2020-10-14 09:25:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:32,564 INFO L479 AbstractCegarLoop]: Abstraction has 96857 states and 150264 transitions. [2020-10-14 09:25:32,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:32,564 INFO L276 IsEmpty]: Start isEmpty. Operand 96857 states and 150264 transitions. [2020-10-14 09:25:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:25:32,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:32,569 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] [2020-10-14 09:25:32,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:25:32,569 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:32,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1629278171, now seen corresponding path program 1 times [2020-10-14 09:25:32,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:32,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584649328] [2020-10-14 09:25:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:32,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:32,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:32,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:25:32,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:25:32,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-14 09:25:32,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:32,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:25:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 09:25:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:25:32,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:33,102 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:33,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:33,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:33,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:33,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:33,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:33,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:25:33,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:33,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:33,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:33,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:33,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:33,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584649328] [2020-10-14 09:25:33,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:33,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:25:33,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541027077] [2020-10-14 09:25:33,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:25:33,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:33,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:25:33,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:33,153 INFO L87 Difference]: Start difference. First operand 96857 states and 150264 transitions. Second operand 5 states. [2020-10-14 09:25:33,344 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:25:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:50,550 INFO L93 Difference]: Finished difference Result 321715 states and 501567 transitions. [2020-10-14 09:25:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:25:50,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 09:25:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:50,948 INFO L225 Difference]: With dead ends: 321715 [2020-10-14 09:25:50,948 INFO L226 Difference]: Without dead ends: 225989 [2020-10-14 09:25:51,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:25:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225989 states. [2020-10-14 09:26:05,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225989 to 160989. [2020-10-14 09:26:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160989 states. [2020-10-14 09:26:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160989 states to 160989 states and 248994 transitions. [2020-10-14 09:26:06,231 INFO L78 Accepts]: Start accepts. Automaton has 160989 states and 248994 transitions. Word has length 74 [2020-10-14 09:26:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:06,232 INFO L479 AbstractCegarLoop]: Abstraction has 160989 states and 248994 transitions. [2020-10-14 09:26:06,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 160989 states and 248994 transitions. [2020-10-14 09:26:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:26:06,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:06,237 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] [2020-10-14 09:26:06,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:26:06,238 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:06,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1949110722, now seen corresponding path program 1 times [2020-10-14 09:26:06,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:06,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441259965] [2020-10-14 09:26:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:06,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:06,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:26:06,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:26:06,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-14 09:26:06,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:06,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:06,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:06,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:26:06,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 09:26:06,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:06,827 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:06,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:06,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:06,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:06,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:06,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:26:06,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:06,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:06,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:06,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:06,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:06,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:06,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441259965] [2020-10-14 09:26:06,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:06,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:06,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262208962] [2020-10-14 09:26:06,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:06,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:06,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:06,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:06,850 INFO L87 Difference]: Start difference. First operand 160989 states and 248994 transitions. Second operand 4 states. [2020-10-14 09:26:07,045 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:26:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:24,763 INFO L93 Difference]: Finished difference Result 318081 states and 494092 transitions. [2020-10-14 09:26:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:24,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-14 09:26:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:25,150 INFO L225 Difference]: With dead ends: 318081 [2020-10-14 09:26:25,151 INFO L226 Difference]: Without dead ends: 204775 [2020-10-14 09:26:25,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204775 states. [2020-10-14 09:26:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204775 to 204773. [2020-10-14 09:26:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204773 states. [2020-10-14 09:26:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204773 states to 204773 states and 316154 transitions. [2020-10-14 09:26:44,709 INFO L78 Accepts]: Start accepts. Automaton has 204773 states and 316154 transitions. Word has length 74 [2020-10-14 09:26:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:44,709 INFO L479 AbstractCegarLoop]: Abstraction has 204773 states and 316154 transitions. [2020-10-14 09:26:44,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 204773 states and 316154 transitions. [2020-10-14 09:26:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:26:44,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:44,713 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] [2020-10-14 09:26:44,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 09:26:44,714 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:44,714 INFO L82 PathProgramCache]: Analyzing trace with hash -983971870, now seen corresponding path program 1 times [2020-10-14 09:26:44,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:44,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602400244] [2020-10-14 09:26:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:44,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:44,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:44,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:45,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:45,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:26:45,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:26:45,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-14 09:26:45,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:45,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:45,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:45,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-14 09:26:45,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 09:26:45,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:45,341 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:45,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:45,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:45,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:45,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:45,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:45,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:26:45,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:45,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:45,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:45,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602400244] [2020-10-14 09:26:45,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:45,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:45,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538136840] [2020-10-14 09:26:45,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:45,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:45,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:45,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:45,366 INFO L87 Difference]: Start difference. First operand 204773 states and 316154 transitions. Second operand 4 states. [2020-10-14 09:26:45,580 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:27:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:09,736 INFO L93 Difference]: Finished difference Result 433431 states and 675718 transitions. [2020-10-14 09:27:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:27:09,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-14 09:27:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:10,211 INFO L225 Difference]: With dead ends: 433431 [2020-10-14 09:27:10,211 INFO L226 Difference]: Without dead ends: 266253 [2020-10-14 09:27:10,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20