/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_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:18:14,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:18:14,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:18:14,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:18:14,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:18:14,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:18:14,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:18:14,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:18:14,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:18:14,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:18:14,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:18:14,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:18:14,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:18:14,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:18:14,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:18:14,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:18:14,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:18:14,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:18:14,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:18:14,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:18:14,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:18:14,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:18:14,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:18:14,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:18:14,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:18:14,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:18:14,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:18:14,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:18:14,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:18:14,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:18:14,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:18:14,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:18:14,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:18:14,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:18:14,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:18:14,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:18:14,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:18:14,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:18:14,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:18:14,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:18:14,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:18:14,807 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 09:18:14,831 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:18:14,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:18:14,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:18:14,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:18:14,833 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:18:14,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:18:14,834 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:18:14,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:18:14,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:18:14,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:18:14,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:18:14,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:18:14,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:18:14,835 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:18:14,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:18:14,836 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:18:14,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:18:14,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:18:14,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:18:14,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:18:14,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:18:14,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:18:14,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:18:14,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:18:14,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:18:14,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:18:14,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:18:14,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:18:14,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:18:14,838 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 09:18:15,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:18:15,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:18:15,172 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:18:15,174 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:18:15,175 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:18:15,175 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-14 09:18:15,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5763e383/15d036b5b6924916bac6e16bc08460df/FLAG8a44aaf0b [2020-10-14 09:18:15,769 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:18:15,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-14 09:18:15,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5763e383/15d036b5b6924916bac6e16bc08460df/FLAG8a44aaf0b [2020-10-14 09:18:16,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5763e383/15d036b5b6924916bac6e16bc08460df [2020-10-14 09:18:16,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:18:16,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:18:16,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:18:16,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:18:16,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:18:16,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:18:16" (1/1) ... [2020-10-14 09:18:16,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a428c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16, skipping insertion in model container [2020-10-14 09:18:16,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:18:16" (1/1) ... [2020-10-14 09:18:16,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:18:16,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:18:16,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:18:16,648 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:18:16,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:18:16,818 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:18:16,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16 WrapperNode [2020-10-14 09:18:16,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:18:16,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:18:16,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:18:16,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:18:16,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16" (1/1) ... [2020-10-14 09:18:16,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16" (1/1) ... [2020-10-14 09:18:16,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16" (1/1) ... [2020-10-14 09:18:16,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16" (1/1) ... [2020-10-14 09:18:16,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16" (1/1) ... [2020-10-14 09:18:16,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16" (1/1) ... [2020-10-14 09:18:16,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16" (1/1) ... [2020-10-14 09:18:16,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:18:16,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:18:16,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:18:16,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:18:16,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16" (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 09:18:17,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:18:17,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:18:17,019 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:18:17,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:18:17,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:18:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:18:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:18:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:18:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:18:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:18:17,021 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:18:17,021 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:18:17,021 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:18:17,021 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:18:17,021 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:18:17,022 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:18:17,022 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 09:18:17,022 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:18:17,022 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:18:17,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:18:17,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:18:17,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:18:18,291 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:18:18,291 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:18:18,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:18:18 BoogieIcfgContainer [2020-10-14 09:18:18,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:18:18,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:18:18,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:18:18,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:18:18,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:18:16" (1/3) ... [2020-10-14 09:18:18,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5df8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:18:18, skipping insertion in model container [2020-10-14 09:18:18,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:18:16" (2/3) ... [2020-10-14 09:18:18,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5df8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:18:18, skipping insertion in model container [2020-10-14 09:18:18,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:18:18" (3/3) ... [2020-10-14 09:18:18,322 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-14 09:18:18,333 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:18:18,347 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:18:18,361 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:18:18,387 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:18:18,387 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:18:18,388 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:18:18,388 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:18:18,388 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:18:18,388 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:18:18,388 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:18:18,388 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:18:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states. [2020-10-14 09:18:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 09:18:18,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:18:18,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:18:18,430 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:18:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:18:18,437 INFO L82 PathProgramCache]: Analyzing trace with hash -875220176, now seen corresponding path program 1 times [2020-10-14 09:18:18,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:18:18,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861252490] [2020-10-14 09:18:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:18:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:18,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:19,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:19,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:19,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:19,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:19,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:20,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:21,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:21,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:23,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:23,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 09:18:23,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:18:23,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 09:18:23,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:23,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:23,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:18:23,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-14 09:18:23,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:18:23,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 09:18:24,251 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:18:24,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:18:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:24,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:24,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:24,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:18:24,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:18:24,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-14 09:18:24,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:24,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:18:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:18:24,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:18:24,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:18:24,337 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 09:18:24,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861252490] [2020-10-14 09:18:24,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:18:24,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:18:24,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964890376] [2020-10-14 09:18:24,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:18:24,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:18:24,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:18:24,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:18:24,366 INFO L87 Difference]: Start difference. First operand 335 states. Second operand 4 states. [2020-10-14 09:18:24,670 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-14 09:18:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:18:26,810 INFO L93 Difference]: Finished difference Result 788 states and 1270 transitions. [2020-10-14 09:18:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:18:26,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-14 09:18:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:18:26,833 INFO L225 Difference]: With dead ends: 788 [2020-10-14 09:18:26,833 INFO L226 Difference]: Without dead ends: 594 [2020-10-14 09:18:26,839 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 09:18:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-10-14 09:18:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 570. [2020-10-14 09:18:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2020-10-14 09:18:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 918 transitions. [2020-10-14 09:18:26,948 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 918 transitions. Word has length 83 [2020-10-14 09:18:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:18:26,949 INFO L479 AbstractCegarLoop]: Abstraction has 570 states and 918 transitions. [2020-10-14 09:18:26,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:18:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 918 transitions. [2020-10-14 09:18:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:18:26,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:18:26,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:18:26,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:18:26,965 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:18:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:18:26,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1224750430, now seen corresponding path program 1 times [2020-10-14 09:18:26,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:18:26,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048387464] [2020-10-14 09:18:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:18:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:27,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:27,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:27,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:27,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:27,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:28,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:30,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:32,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:32,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:18:32,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:18:32,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 09:18:32,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:32,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:32,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:18:32,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 09:18:32,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:18:32,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-14 09:18:32,314 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:18:32,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:18:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:32,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:32,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:32,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:18:32,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:18:32,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 09:18:32,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:32,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:32,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:18:32,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:18:32,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:18:32,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:18:32,367 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 09:18:32,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048387464] [2020-10-14 09:18:32,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:18:32,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:18:32,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748689543] [2020-10-14 09:18:32,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:18:32,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:18:32,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:18:32,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:18:32,372 INFO L87 Difference]: Start difference. First operand 570 states and 918 transitions. Second operand 4 states. [2020-10-14 09:18:32,572 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-14 09:18:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:18:34,332 INFO L93 Difference]: Finished difference Result 1264 states and 2021 transitions. [2020-10-14 09:18:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:18:34,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-14 09:18:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:18:34,339 INFO L225 Difference]: With dead ends: 1264 [2020-10-14 09:18:34,340 INFO L226 Difference]: Without dead ends: 990 [2020-10-14 09:18:34,343 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 09:18:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2020-10-14 09:18:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 944. [2020-10-14 09:18:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-10-14 09:18:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1510 transitions. [2020-10-14 09:18:34,416 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1510 transitions. Word has length 84 [2020-10-14 09:18:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:18:34,417 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1510 transitions. [2020-10-14 09:18:34,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:18:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1510 transitions. [2020-10-14 09:18:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 09:18:34,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:18:34,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:18:34,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:18:34,421 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:18:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:18:34,422 INFO L82 PathProgramCache]: Analyzing trace with hash -237489024, now seen corresponding path program 1 times [2020-10-14 09:18:34,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:18:34,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614109250] [2020-10-14 09:18:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:18:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:34,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:34,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:34,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:34,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:34,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:35,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:38,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:39,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:39,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 09:18:39,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:18:39,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:18:39,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:39,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:39,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:18:39,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-14 09:18:39,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:18:39,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:18:39,667 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:18:39,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:18:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:39,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:39,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:39,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:18:39,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:18:39,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:18:39,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:39,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:39,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:18:39,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:18:39,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:18:39,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:18:39,709 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 09:18:39,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614109250] [2020-10-14 09:18:39,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:18:39,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:18:39,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682488568] [2020-10-14 09:18:39,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:18:39,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:18:39,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:18:39,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:18:39,717 INFO L87 Difference]: Start difference. First operand 944 states and 1510 transitions. Second operand 4 states. [2020-10-14 09:18:39,920 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-14 09:18:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:18:41,732 INFO L93 Difference]: Finished difference Result 1944 states and 3088 transitions. [2020-10-14 09:18:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:18:41,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-14 09:18:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:18:41,749 INFO L225 Difference]: With dead ends: 1944 [2020-10-14 09:18:41,750 INFO L226 Difference]: Without dead ends: 1574 [2020-10-14 09:18:41,753 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 09:18:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2020-10-14 09:18:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1484. [2020-10-14 09:18:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1484 states. [2020-10-14 09:18:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2354 transitions. [2020-10-14 09:18:41,863 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2354 transitions. Word has length 85 [2020-10-14 09:18:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:18:41,863 INFO L479 AbstractCegarLoop]: Abstraction has 1484 states and 2354 transitions. [2020-10-14 09:18:41,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:18:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2354 transitions. [2020-10-14 09:18:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 09:18:41,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:18:41,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:18:41,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:18:41,868 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:18:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:18:41,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2134264010, now seen corresponding path program 1 times [2020-10-14 09:18:41,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:18:41,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491691190] [2020-10-14 09:18:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:18:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:41,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:41,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:41,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:41,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:42,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:42,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:43,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:46,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:46,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 09:18:46,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:18:46,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:18:46,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:46,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:18:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 09:18:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 09:18:46,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:18:47,201 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:18:47,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:18:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:47,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:47,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:47,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:18:47,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:18:47,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:18:47,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:47,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:47,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:18:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:18:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:18:47,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:18:47,267 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 09:18:47,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491691190] [2020-10-14 09:18:47,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:18:47,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:18:47,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011674790] [2020-10-14 09:18:47,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:18:47,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:18:47,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:18:47,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:18:47,272 INFO L87 Difference]: Start difference. First operand 1484 states and 2354 transitions. Second operand 4 states. [2020-10-14 09:18:47,536 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-14 09:18:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:18:49,407 INFO L93 Difference]: Finished difference Result 3772 states and 5954 transitions. [2020-10-14 09:18:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:18:49,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-14 09:18:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:18:49,426 INFO L225 Difference]: With dead ends: 3772 [2020-10-14 09:18:49,426 INFO L226 Difference]: Without dead ends: 2794 [2020-10-14 09:18:49,430 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 09:18:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2020-10-14 09:18:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2616. [2020-10-14 09:18:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2616 states. [2020-10-14 09:18:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 4116 transitions. [2020-10-14 09:18:49,566 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 4116 transitions. Word has length 86 [2020-10-14 09:18:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:18:49,567 INFO L479 AbstractCegarLoop]: Abstraction has 2616 states and 4116 transitions. [2020-10-14 09:18:49,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:18:49,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 4116 transitions. [2020-10-14 09:18:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 09:18:49,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:18:49,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:18:49,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:18:49,581 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:18:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:18:49,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1375903605, now seen corresponding path program 1 times [2020-10-14 09:18:49,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:18:49,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494462995] [2020-10-14 09:18:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:18:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:49,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:49,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:49,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:49,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:50,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:54,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:54,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 09:18:54,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:18:54,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4442 [2020-10-14 09:18:54,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:54,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:54,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:18:54,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 09:18:54,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 09:18:54,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:18:54,258 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:18:54,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:18:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:54,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:54,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:54,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:18:54,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:18:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:18:54,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:54,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:18:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:18:54,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:18:54,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:18:54,300 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 09:18:54,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494462995] [2020-10-14 09:18:54,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:18:54,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:18:54,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253863779] [2020-10-14 09:18:54,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:18:54,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:18:54,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:18:54,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:18:54,303 INFO L87 Difference]: Start difference. First operand 2616 states and 4116 transitions. Second operand 4 states. [2020-10-14 09:18:54,477 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-14 09:18:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:18:56,314 INFO L93 Difference]: Finished difference Result 6140 states and 9606 transitions. [2020-10-14 09:18:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:18:56,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-14 09:18:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:18:56,336 INFO L225 Difference]: With dead ends: 6140 [2020-10-14 09:18:56,336 INFO L226 Difference]: Without dead ends: 4762 [2020-10-14 09:18:56,341 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 09:18:56,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2020-10-14 09:18:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 4408. [2020-10-14 09:18:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4408 states. [2020-10-14 09:18:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6860 transitions. [2020-10-14 09:18:56,545 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6860 transitions. Word has length 87 [2020-10-14 09:18:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:18:56,546 INFO L479 AbstractCegarLoop]: Abstraction has 4408 states and 6860 transitions. [2020-10-14 09:18:56,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:18:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6860 transitions. [2020-10-14 09:18:56,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 09:18:56,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:18:56,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:18:56,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:18:56,560 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:18:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:18:56,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1810475700, now seen corresponding path program 1 times [2020-10-14 09:18:56,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:18:56,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143568103] [2020-10-14 09:18:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:18:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:56,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:56,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:56,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:57,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:57,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 09:18:57,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:18:57,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1351 [2020-10-14 09:18:57,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:57,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:57,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:18:57,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 09:18:57,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:18:57,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:18:58,138 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:18:58,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:18:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:58,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:58,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:58,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:18:58,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:18:58,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:18:58,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:58,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:58,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:18:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:18:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:18:58,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:18:58,170 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 09:18:58,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143568103] [2020-10-14 09:18:58,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:18:58,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:18:58,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641894672] [2020-10-14 09:18:58,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:18:58,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:18:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:18:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:18:58,173 INFO L87 Difference]: Start difference. First operand 4408 states and 6860 transitions. Second operand 5 states. [2020-10-14 09:18:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:18:59,569 INFO L93 Difference]: Finished difference Result 8090 states and 12525 transitions. [2020-10-14 09:18:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:18:59,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-14 09:18:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:18:59,590 INFO L225 Difference]: With dead ends: 8090 [2020-10-14 09:18:59,590 INFO L226 Difference]: Without dead ends: 4408 [2020-10-14 09:18:59,599 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 09:18:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2020-10-14 09:18:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 4408. [2020-10-14 09:18:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4408 states. [2020-10-14 09:18:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6796 transitions. [2020-10-14 09:18:59,805 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6796 transitions. Word has length 88 [2020-10-14 09:18:59,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:18:59,806 INFO L479 AbstractCegarLoop]: Abstraction has 4408 states and 6796 transitions. [2020-10-14 09:18:59,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:18:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6796 transitions. [2020-10-14 09:18:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 09:18:59,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:18:59,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:18:59,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:18:59,816 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:18:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:18:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1385711852, now seen corresponding path program 1 times [2020-10-14 09:18:59,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:18:59,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522370797] [2020-10-14 09:18:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:18:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:59,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:59,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:00,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:00,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:00,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:00,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 09:19:00,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:19:00,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-10-14 09:19:00,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:00,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 09:19:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 09:19:00,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:01,164 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:19:01,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:01,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:01,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:01,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:01,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:01,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:19:01,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:01,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:01,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:01,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:01,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:01,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:01,225 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 09:19:01,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522370797] [2020-10-14 09:19:01,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:01,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:01,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413809675] [2020-10-14 09:19:01,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:01,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:01,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:01,229 INFO L87 Difference]: Start difference. First operand 4408 states and 6796 transitions. Second operand 4 states. [2020-10-14 09:19:01,416 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 09:19:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:02,941 INFO L93 Difference]: Finished difference Result 9195 states and 14103 transitions. [2020-10-14 09:19:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:02,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-14 09:19:02,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:02,979 INFO L225 Difference]: With dead ends: 9195 [2020-10-14 09:19:02,980 INFO L226 Difference]: Without dead ends: 7305 [2020-10-14 09:19:02,989 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 09:19:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7305 states. [2020-10-14 09:19:03,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7305 to 7303. [2020-10-14 09:19:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7303 states. [2020-10-14 09:19:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 11141 transitions. [2020-10-14 09:19:03,411 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 11141 transitions. Word has length 89 [2020-10-14 09:19:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:03,412 INFO L479 AbstractCegarLoop]: Abstraction has 7303 states and 11141 transitions. [2020-10-14 09:19:03,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 11141 transitions. [2020-10-14 09:19:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 09:19:03,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:03,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:03,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:19:03,427 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:03,428 INFO L82 PathProgramCache]: Analyzing trace with hash 50251447, now seen corresponding path program 1 times [2020-10-14 09:19:03,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:03,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366562206] [2020-10-14 09:19:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:03,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:03,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:03,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:03,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 09:19:03,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:19:03,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-14 09:19:03,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:03,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:19:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-14 09:19:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:19:03,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:03,970 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:19:03,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:03,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:03,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:03,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:03,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:03,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:19:03,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:03,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:03,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:03,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:03,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:03,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:03,997 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 09:19:03,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366562206] [2020-10-14 09:19:03,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:03,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:19:03,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166264103] [2020-10-14 09:19:03,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:19:03,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:03,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:19:04,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:19:04,000 INFO L87 Difference]: Start difference. First operand 7303 states and 11141 transitions. Second operand 5 states. [2020-10-14 09:19:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:05,921 INFO L93 Difference]: Finished difference Result 10297 states and 15680 transitions. [2020-10-14 09:19:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:19:05,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2020-10-14 09:19:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:05,957 INFO L225 Difference]: With dead ends: 10297 [2020-10-14 09:19:05,958 INFO L226 Difference]: Without dead ends: 10295 [2020-10-14 09:19:05,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 09:19:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10295 states. [2020-10-14 09:19:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10295 to 7367. [2020-10-14 09:19:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7367 states. [2020-10-14 09:19:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7367 states to 7367 states and 11205 transitions. [2020-10-14 09:19:06,335 INFO L78 Accepts]: Start accepts. Automaton has 7367 states and 11205 transitions. Word has length 91 [2020-10-14 09:19:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:06,335 INFO L479 AbstractCegarLoop]: Abstraction has 7367 states and 11205 transitions. [2020-10-14 09:19:06,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:19:06,335 INFO L276 IsEmpty]: Start isEmpty. Operand 7367 states and 11205 transitions. [2020-10-14 09:19:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 09:19:06,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:06,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:06,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:19:06,349 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1567414832, now seen corresponding path program 1 times [2020-10-14 09:19:06,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:06,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102946700] [2020-10-14 09:19:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:06,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:06,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:06,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 09:19:06,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:06,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-14 09:19:06,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:06,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:06,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:19:06,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:19:06,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:19:06,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:06,686 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:19:06,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:06,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:06,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:06,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:06,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:06,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:19:06,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:06,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:06,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:06,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:06,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:06,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:06,719 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 09:19:06,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102946700] [2020-10-14 09:19:06,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:06,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:19:06,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372317461] [2020-10-14 09:19:06,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:19:06,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:06,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:19:06,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:19:06,721 INFO L87 Difference]: Start difference. First operand 7367 states and 11205 transitions. Second operand 5 states. [2020-10-14 09:19:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:08,354 INFO L93 Difference]: Finished difference Result 14696 states and 22340 transitions. [2020-10-14 09:19:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:19:08,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2020-10-14 09:19:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:08,381 INFO L225 Difference]: With dead ends: 14696 [2020-10-14 09:19:08,381 INFO L226 Difference]: Without dead ends: 7367 [2020-10-14 09:19:08,394 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 09:19:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7367 states. [2020-10-14 09:19:08,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7367 to 7367. [2020-10-14 09:19:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7367 states. [2020-10-14 09:19:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7367 states to 7367 states and 11173 transitions. [2020-10-14 09:19:08,713 INFO L78 Accepts]: Start accepts. Automaton has 7367 states and 11173 transitions. Word has length 92 [2020-10-14 09:19:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:08,713 INFO L479 AbstractCegarLoop]: Abstraction has 7367 states and 11173 transitions. [2020-10-14 09:19:08,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:19:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 7367 states and 11173 transitions. [2020-10-14 09:19:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 09:19:08,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:08,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:08,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:19:08,723 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:08,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1480140998, now seen corresponding path program 1 times [2020-10-14 09:19:08,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:08,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205532027] [2020-10-14 09:19:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:08,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:08,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:08,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:08,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:08,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:08,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:13,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:13,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 09:19:13,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:19:13,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:19:13,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:13,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:13,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:13,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:19:13,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:19:13,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:13,925 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:19:13,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:13,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:13,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:13,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:13,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:19:13,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:13,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:13,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:13,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:13,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:13,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:13,960 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 09:19:13,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205532027] [2020-10-14 09:19:13,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:13,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:13,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456775888] [2020-10-14 09:19:13,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:13,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:13,963 INFO L87 Difference]: Start difference. First operand 7367 states and 11173 transitions. Second operand 4 states. [2020-10-14 09:19:14,173 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 09:19:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:15,905 INFO L93 Difference]: Finished difference Result 12346 states and 18752 transitions. [2020-10-14 09:19:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:15,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-10-14 09:19:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:15,922 INFO L225 Difference]: With dead ends: 12346 [2020-10-14 09:19:15,923 INFO L226 Difference]: Without dead ends: 6966 [2020-10-14 09:19:15,934 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 09:19:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6966 states. [2020-10-14 09:19:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6966 to 6964. [2020-10-14 09:19:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6964 states. [2020-10-14 09:19:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6964 states to 6964 states and 10584 transitions. [2020-10-14 09:19:16,283 INFO L78 Accepts]: Start accepts. Automaton has 6964 states and 10584 transitions. Word has length 123 [2020-10-14 09:19:16,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:16,283 INFO L479 AbstractCegarLoop]: Abstraction has 6964 states and 10584 transitions. [2020-10-14 09:19:16,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 6964 states and 10584 transitions. [2020-10-14 09:19:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 09:19:16,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:16,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:16,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:19:16,297 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:16,297 INFO L82 PathProgramCache]: Analyzing trace with hash -976341323, now seen corresponding path program 1 times [2020-10-14 09:19:16,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:16,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399290065] [2020-10-14 09:19:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:16,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:16,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:16,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:16,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:16,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:16,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:16,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:19,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:19,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:19,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:21,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:21,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 09:19:21,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:19:21,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:19:21,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:21,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:21,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:21,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:19:21,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 09:19:21,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:21,500 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:19:21,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:21,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:21,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:21,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:21,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:21,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:19:21,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:21,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:21,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:21,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:21,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:21,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:21,536 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 09:19:21,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399290065] [2020-10-14 09:19:21,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:21,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:21,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679047328] [2020-10-14 09:19:21,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:21,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:21,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:21,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:21,538 INFO L87 Difference]: Start difference. First operand 6964 states and 10584 transitions. Second operand 4 states. [2020-10-14 09:19:21,748 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 09:19:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:23,181 INFO L93 Difference]: Finished difference Result 11403 states and 17333 transitions. [2020-10-14 09:19:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:23,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-10-14 09:19:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:23,196 INFO L225 Difference]: With dead ends: 11403 [2020-10-14 09:19:23,196 INFO L226 Difference]: Without dead ends: 6088 [2020-10-14 09:19:23,208 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 09:19:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6088 states. [2020-10-14 09:19:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6088 to 6086. [2020-10-14 09:19:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6086 states. [2020-10-14 09:19:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 9260 transitions. [2020-10-14 09:19:23,642 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 9260 transitions. Word has length 124 [2020-10-14 09:19:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:23,642 INFO L479 AbstractCegarLoop]: Abstraction has 6086 states and 9260 transitions. [2020-10-14 09:19:23,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:23,643 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 9260 transitions. [2020-10-14 09:19:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-14 09:19:23,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:23,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:23,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:19:23,651 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:23,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:23,652 INFO L82 PathProgramCache]: Analyzing trace with hash -110166762, now seen corresponding path program 1 times [2020-10-14 09:19:23,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:23,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801204171] [2020-10-14 09:19:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:23,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:23,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:23,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:23,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:23,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:23,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:24,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:25,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:25,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:25,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:25,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:28,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:28,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-14 09:19:28,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 09:19:28,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:19:28,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:28,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:28,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:28,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 09:19:28,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:19:28,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:28,855 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:19:28,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:28,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:28,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:28,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:28,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:28,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:19:28,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:28,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:28,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:28,881 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 09:19:28,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801204171] [2020-10-14 09:19:28,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:28,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:28,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387175156] [2020-10-14 09:19:28,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:28,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:28,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:28,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:28,883 INFO L87 Difference]: Start difference. First operand 6086 states and 9260 transitions. Second operand 4 states. [2020-10-14 09:19:29,074 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 09:19:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:30,399 INFO L93 Difference]: Finished difference Result 10235 states and 15560 transitions. [2020-10-14 09:19:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:30,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-10-14 09:19:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:30,413 INFO L225 Difference]: With dead ends: 10235 [2020-10-14 09:19:30,414 INFO L226 Difference]: Without dead ends: 5372 [2020-10-14 09:19:30,423 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 09:19:30,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5372 states. [2020-10-14 09:19:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5372 to 5370. [2020-10-14 09:19:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5370 states. [2020-10-14 09:19:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 8168 transitions. [2020-10-14 09:19:30,719 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 8168 transitions. Word has length 125 [2020-10-14 09:19:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:30,719 INFO L479 AbstractCegarLoop]: Abstraction has 5370 states and 8168 transitions. [2020-10-14 09:19:30,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:30,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 8168 transitions. [2020-10-14 09:19:30,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 09:19:30,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:30,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:30,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:19:30,731 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:30,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2031014694, now seen corresponding path program 1 times [2020-10-14 09:19:30,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:30,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866906830] [2020-10-14 09:19:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:30,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:30,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:30,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:30,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:30,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:31,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:32,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:32,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:32,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:35,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:35,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 09:19:35,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:19:35,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:19:35,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:35,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:19:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 09:19:35,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:36,040 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:19:36,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:36,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:36,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:36,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:36,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:36,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:19:36,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:36,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:36,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:36,066 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 09:19:36,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866906830] [2020-10-14 09:19:36,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:36,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:36,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136799180] [2020-10-14 09:19:36,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:36,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:36,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:36,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:36,068 INFO L87 Difference]: Start difference. First operand 5370 states and 8168 transitions. Second operand 4 states. [2020-10-14 09:19:36,260 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 09:19:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:37,790 INFO L93 Difference]: Finished difference Result 9703 states and 14777 transitions. [2020-10-14 09:19:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:37,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-10-14 09:19:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:37,799 INFO L225 Difference]: With dead ends: 9703 [2020-10-14 09:19:37,799 INFO L226 Difference]: Without dead ends: 5235 [2020-10-14 09:19:37,806 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 09:19:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5235 states. [2020-10-14 09:19:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5235 to 5233. [2020-10-14 09:19:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5233 states. [2020-10-14 09:19:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 7967 transitions. [2020-10-14 09:19:38,048 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 7967 transitions. Word has length 126 [2020-10-14 09:19:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:38,048 INFO L479 AbstractCegarLoop]: Abstraction has 5233 states and 7967 transitions. [2020-10-14 09:19:38,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 7967 transitions. [2020-10-14 09:19:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-14 09:19:38,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:38,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:38,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:19:38,056 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1072017879, now seen corresponding path program 1 times [2020-10-14 09:19:38,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:38,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472544481] [2020-10-14 09:19:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:38,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:38,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:38,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:38,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:38,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:38,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:41,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:41,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:41,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:43,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:43,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-14 09:19:43,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:19:43,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:19:43,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:43,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:43,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:43,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:19:43,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:19:43,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:43,262 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:19:43,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:43,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:43,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:43,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:43,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:43,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:19:43,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:43,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:43,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:43,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:43,298 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 09:19:43,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472544481] [2020-10-14 09:19:43,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:43,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:43,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817985495] [2020-10-14 09:19:43,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:43,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:43,300 INFO L87 Difference]: Start difference. First operand 5233 states and 7967 transitions. Second operand 4 states. [2020-10-14 09:19:43,510 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 09:19:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:44,788 INFO L93 Difference]: Finished difference Result 9516 states and 14499 transitions. [2020-10-14 09:19:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:44,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-10-14 09:19:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:44,795 INFO L225 Difference]: With dead ends: 9516 [2020-10-14 09:19:44,795 INFO L226 Difference]: Without dead ends: 5110 [2020-10-14 09:19:44,801 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 09:19:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5110 states. [2020-10-14 09:19:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5110 to 5108. [2020-10-14 09:19:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5108 states. [2020-10-14 09:19:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 7780 transitions. [2020-10-14 09:19:44,982 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 7780 transitions. Word has length 127 [2020-10-14 09:19:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:44,982 INFO L479 AbstractCegarLoop]: Abstraction has 5108 states and 7780 transitions. [2020-10-14 09:19:44,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 7780 transitions. [2020-10-14 09:19:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 09:19:44,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:44,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:44,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:19:44,991 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1038531088, now seen corresponding path program 1 times [2020-10-14 09:19:44,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:44,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093260461] [2020-10-14 09:19:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:45,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:45,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:45,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:45,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:45,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:45,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:45,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:45,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:50,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:50,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 09:19:50,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:19:50,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:19:50,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:50,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-14 09:19:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 09:19:50,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:50,216 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:19:50,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:50,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:50,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:50,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:50,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:50,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:19:50,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:50,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:50,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:50,243 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 09:19:50,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093260461] [2020-10-14 09:19:50,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:50,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:50,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5140744] [2020-10-14 09:19:50,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:50,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:50,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:50,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:50,245 INFO L87 Difference]: Start difference. First operand 5108 states and 7780 transitions. Second operand 4 states. [2020-10-14 09:19:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:51,590 INFO L93 Difference]: Finished difference Result 8760 states and 13350 transitions. [2020-10-14 09:19:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:19:51,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 09:19:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:51,599 INFO L225 Difference]: With dead ends: 8760 [2020-10-14 09:19:51,599 INFO L226 Difference]: Without dead ends: 4479 [2020-10-14 09:19:51,606 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 09:19:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4479 states. [2020-10-14 09:19:51,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4479 to 4477. [2020-10-14 09:19:51,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4477 states. [2020-10-14 09:19:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 6779 transitions. [2020-10-14 09:19:51,786 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 6779 transitions. Word has length 128 [2020-10-14 09:19:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:51,787 INFO L479 AbstractCegarLoop]: Abstraction has 4477 states and 6779 transitions. [2020-10-14 09:19:51,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 6779 transitions. [2020-10-14 09:19:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 09:19:51,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:51,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:51,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:19:51,790 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:51,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:51,790 INFO L82 PathProgramCache]: Analyzing trace with hash -910308245, now seen corresponding path program 1 times [2020-10-14 09:19:51,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:51,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589883997] [2020-10-14 09:19:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:51,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:51,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:51,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:51,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:51,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:52,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:52,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:56,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:56,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 09:19:56,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:19:56,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:19:56,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:56,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:56,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:56,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-14 09:19:56,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:19:56,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:57,006 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:19:57,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:57,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:57,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:57,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:57,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:57,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:19:57,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:57,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:57,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:57,033 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 09:19:57,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589883997] [2020-10-14 09:19:57,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:57,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:57,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159290141] [2020-10-14 09:19:57,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:57,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:57,036 INFO L87 Difference]: Start difference. First operand 4477 states and 6779 transitions. Second operand 4 states. [2020-10-14 09:19:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:59,327 INFO L93 Difference]: Finished difference Result 12846 states and 19446 transitions. [2020-10-14 09:19:59,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:19:59,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 09:19:59,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:59,338 INFO L225 Difference]: With dead ends: 12846 [2020-10-14 09:19:59,338 INFO L226 Difference]: Without dead ends: 8515 [2020-10-14 09:19:59,346 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 09:19:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8515 states. [2020-10-14 09:19:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8515 to 8513. [2020-10-14 09:19:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8513 states. [2020-10-14 09:19:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8513 states to 8513 states and 12800 transitions. [2020-10-14 09:19:59,702 INFO L78 Accepts]: Start accepts. Automaton has 8513 states and 12800 transitions. Word has length 128 [2020-10-14 09:19:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:59,702 INFO L479 AbstractCegarLoop]: Abstraction has 8513 states and 12800 transitions. [2020-10-14 09:19:59,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 8513 states and 12800 transitions. [2020-10-14 09:19:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 09:19:59,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:59,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:59,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:19:59,708 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:59,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1537904603, now seen corresponding path program 1 times [2020-10-14 09:19:59,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:59,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744805113] [2020-10-14 09:19:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:59,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:59,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:59,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:59,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:59,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:00,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:00,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:04,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:04,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 09:20:04,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:20:04,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:20:04,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:04,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:04,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:04,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-14 09:20:04,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:20:04,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:04,915 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:20:04,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:04,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:04,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:04,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:04,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:04,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:20:04,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:04,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:04,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:04,946 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 09:20:04,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744805113] [2020-10-14 09:20:04,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:04,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:04,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871717594] [2020-10-14 09:20:04,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:04,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:04,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:04,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:04,948 INFO L87 Difference]: Start difference. First operand 8513 states and 12800 transitions. Second operand 4 states. [2020-10-14 09:20:05,141 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 09:20:06,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:06,876 INFO L93 Difference]: Finished difference Result 24247 states and 36385 transitions. [2020-10-14 09:20:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:06,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 09:20:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:06,895 INFO L225 Difference]: With dead ends: 24247 [2020-10-14 09:20:06,895 INFO L226 Difference]: Without dead ends: 16075 [2020-10-14 09:20:06,908 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 09:20:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16075 states. [2020-10-14 09:20:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16075 to 16073. [2020-10-14 09:20:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16073 states. [2020-10-14 09:20:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16073 states to 16073 states and 23934 transitions. [2020-10-14 09:20:07,579 INFO L78 Accepts]: Start accepts. Automaton has 16073 states and 23934 transitions. Word has length 128 [2020-10-14 09:20:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:07,579 INFO L479 AbstractCegarLoop]: Abstraction has 16073 states and 23934 transitions. [2020-10-14 09:20:07,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 16073 states and 23934 transitions. [2020-10-14 09:20:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 09:20:07,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:07,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:07,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:20:07,591 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:07,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:07,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1441940590, now seen corresponding path program 1 times [2020-10-14 09:20:07,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:07,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059347572] [2020-10-14 09:20:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:07,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:07,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:07,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:07,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:08,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:08,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:08,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:12,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:12,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 09:20:12,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:20:12,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:20:12,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:12,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:12,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:12,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-14 09:20:12,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 09:20:12,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:12,801 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:20:12,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:12,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:12,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:12,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:12,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:12,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:20:12,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:12,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:12,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:12,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:12,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:12,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:12,831 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 09:20:12,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059347572] [2020-10-14 09:20:12,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:12,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:12,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927589892] [2020-10-14 09:20:12,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:12,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:12,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:12,834 INFO L87 Difference]: Start difference. First operand 16073 states and 23934 transitions. Second operand 4 states. [2020-10-14 09:20:13,032 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 09:20:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:15,350 INFO L93 Difference]: Finished difference Result 45347 states and 67255 transitions. [2020-10-14 09:20:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:15,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 09:20:15,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:15,385 INFO L225 Difference]: With dead ends: 45347 [2020-10-14 09:20:15,385 INFO L226 Difference]: Without dead ends: 30197 [2020-10-14 09:20:15,409 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 09:20:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30197 states. [2020-10-14 09:20:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30197 to 30195. [2020-10-14 09:20:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30195 states. [2020-10-14 09:20:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30195 states to 30195 states and 44415 transitions. [2020-10-14 09:20:16,881 INFO L78 Accepts]: Start accepts. Automaton has 30195 states and 44415 transitions. Word has length 128 [2020-10-14 09:20:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:16,881 INFO L479 AbstractCegarLoop]: Abstraction has 30195 states and 44415 transitions. [2020-10-14 09:20:16,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 30195 states and 44415 transitions. [2020-10-14 09:20:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 09:20:16,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:16,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:16,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:20:16,900 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash 784836083, now seen corresponding path program 1 times [2020-10-14 09:20:16,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:16,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042353787] [2020-10-14 09:20:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:16,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:16,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:16,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:17,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:17,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:21,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:21,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 09:20:21,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:20:21,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 09:20:21,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:21,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:21,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-14 09:20:21,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:20:21,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:22,113 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:20:22,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:22,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:22,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:22,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:22,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:22,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:20:22,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:22,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:22,143 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 09:20:22,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042353787] [2020-10-14 09:20:22,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:22,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:22,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74947862] [2020-10-14 09:20:22,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:22,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:22,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:22,145 INFO L87 Difference]: Start difference. First operand 30195 states and 44415 transitions. Second operand 4 states. [2020-10-14 09:20:22,336 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 09:20:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:25,893 INFO L93 Difference]: Finished difference Result 83127 states and 121329 transitions. [2020-10-14 09:20:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:25,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 09:20:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:25,959 INFO L225 Difference]: With dead ends: 83127 [2020-10-14 09:20:25,959 INFO L226 Difference]: Without dead ends: 55960 [2020-10-14 09:20:25,996 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 09:20:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55960 states. [2020-10-14 09:20:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55960 to 55958. [2020-10-14 09:20:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55958 states. [2020-10-14 09:20:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55958 states to 55958 states and 80913 transitions. [2020-10-14 09:20:28,736 INFO L78 Accepts]: Start accepts. Automaton has 55958 states and 80913 transitions. Word has length 128 [2020-10-14 09:20:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:28,737 INFO L479 AbstractCegarLoop]: Abstraction has 55958 states and 80913 transitions. [2020-10-14 09:20:28,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 55958 states and 80913 transitions. [2020-10-14 09:20:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 09:20:28,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:28,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:28,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 09:20:28,779 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:28,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1653466986, now seen corresponding path program 1 times [2020-10-14 09:20:28,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:28,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421579249] [2020-10-14 09:20:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:28,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:28,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:28,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:28,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:31,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:32,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:32,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:32,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:32,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:32,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:33,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:33,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 09:20:33,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-14 09:20:33,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:20:33,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:33,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:33,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:33,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-14 09:20:33,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 09:20:33,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:33,996 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:20:33,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:34,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:34,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:34,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:34,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:34,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:20:34,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:34,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:34,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:34,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:34,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:34,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:34,022 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 09:20:34,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421579249] [2020-10-14 09:20:34,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:34,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:34,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327450589] [2020-10-14 09:20:34,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:34,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:34,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:34,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:34,024 INFO L87 Difference]: Start difference. First operand 55958 states and 80913 transitions. Second operand 4 states. [2020-10-14 09:20:34,206 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-14 09:20:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:39,104 INFO L93 Difference]: Finished difference Result 136410 states and 196441 transitions. [2020-10-14 09:20:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:39,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 09:20:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:39,194 INFO L225 Difference]: With dead ends: 136410 [2020-10-14 09:20:39,195 INFO L226 Difference]: Without dead ends: 80776 [2020-10-14 09:20:39,237 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 09:20:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80776 states. [2020-10-14 09:20:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80776 to 80774. [2020-10-14 09:20:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80774 states. [2020-10-14 09:20:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80774 states to 80774 states and 115569 transitions. [2020-10-14 09:20:43,194 INFO L78 Accepts]: Start accepts. Automaton has 80774 states and 115569 transitions. Word has length 128 [2020-10-14 09:20:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:43,194 INFO L479 AbstractCegarLoop]: Abstraction has 80774 states and 115569 transitions. [2020-10-14 09:20:43,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 80774 states and 115569 transitions. [2020-10-14 09:20:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 09:20:43,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:43,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:20:43,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 09:20:43,237 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:43,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:43,238 INFO L82 PathProgramCache]: Analyzing trace with hash 955750606, now seen corresponding path program 1 times [2020-10-14 09:20:43,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:43,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207094553] [2020-10-14 09:20:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:43,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:43,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:43,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:43,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:43,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:43,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:43,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:48,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:48,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 09:20:48,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:20:48,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:20:48,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:48,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:48,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:48,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 09:20:48,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:20:48,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:48,450 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:20:48,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:48,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:48,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:48,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:48,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:48,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:20:48,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:48,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:48,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:48,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:48,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:48,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:48,477 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 09:20:48,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207094553] [2020-10-14 09:20:48,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:48,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:48,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217362576] [2020-10-14 09:20:48,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:48,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:48,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:48,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:48,479 INFO L87 Difference]: Start difference. First operand 80774 states and 115569 transitions. Second operand 4 states. [2020-10-14 09:20:48,670 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 09:20:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:59,267 INFO L93 Difference]: Finished difference Result 231768 states and 329711 transitions. [2020-10-14 09:20:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:59,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 09:20:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:59,463 INFO L225 Difference]: With dead ends: 231768 [2020-10-14 09:20:59,463 INFO L226 Difference]: Without dead ends: 151958 [2020-10-14 09:20:59,527 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 09:20:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151958 states. [2020-10-14 09:21:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151958 to 151956. [2020-10-14 09:21:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151956 states. [2020-10-14 09:21:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151956 states to 151956 states and 213975 transitions. [2020-10-14 09:21:07,163 INFO L78 Accepts]: Start accepts. Automaton has 151956 states and 213975 transitions. Word has length 128 [2020-10-14 09:21:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:07,164 INFO L479 AbstractCegarLoop]: Abstraction has 151956 states and 213975 transitions. [2020-10-14 09:21:07,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:07,164 INFO L276 IsEmpty]: Start isEmpty. Operand 151956 states and 213975 transitions. [2020-10-14 09:21:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 09:21:07,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:07,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:21:07,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 09:21:07,245 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:07,246 INFO L82 PathProgramCache]: Analyzing trace with hash 618071903, now seen corresponding path program 1 times [2020-10-14 09:21:07,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:07,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707359581] [2020-10-14 09:21:07,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:07,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:07,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:07,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:09,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:09,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:09,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:11,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:11,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:11,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:11,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:11,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:11,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:11,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:11,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:12,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:12,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 09:21:12,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-14 09:21:12,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 09:21:12,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:12,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:12,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:21:12,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 09:21:12,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:21:12,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:12,485 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:21:12,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:12,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:12,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:12,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:12,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:21:12,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:12,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:12,512 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 09:21:12,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707359581] [2020-10-14 09:21:12,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:21:12,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:21:12,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430953818] [2020-10-14 09:21:12,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:21:12,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:21:12,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:21:12,514 INFO L87 Difference]: Start difference. First operand 151956 states and 213975 transitions. Second operand 4 states. [2020-10-14 09:21:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:17,330 INFO L93 Difference]: Finished difference Result 211988 states and 298189 transitions. [2020-10-14 09:21:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:21:17,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 09:21:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:17,415 INFO L225 Difference]: With dead ends: 211988 [2020-10-14 09:21:17,415 INFO L226 Difference]: Without dead ends: 69522 [2020-10-14 09:21:17,504 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 09:21:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69522 states. [2020-10-14 09:21:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69522 to 67500. [2020-10-14 09:21:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67500 states. [2020-10-14 09:21:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67500 states to 67500 states and 94499 transitions. [2020-10-14 09:21:23,675 INFO L78 Accepts]: Start accepts. Automaton has 67500 states and 94499 transitions. Word has length 128 [2020-10-14 09:21:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:23,676 INFO L479 AbstractCegarLoop]: Abstraction has 67500 states and 94499 transitions. [2020-10-14 09:21:23,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 67500 states and 94499 transitions. [2020-10-14 09:21:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-14 09:21:23,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:23,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:21:23,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 09:21:23,715 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:23,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:23,716 INFO L82 PathProgramCache]: Analyzing trace with hash -649457618, now seen corresponding path program 1 times [2020-10-14 09:21:23,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:23,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954832608] [2020-10-14 09:21:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:23,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:23,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:23,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:24,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:24,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:24,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:24,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:24,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:24,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:24,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:25,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:25,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:25,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:25,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:25,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:25,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:25,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:28,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:28,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-14 09:21:28,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:21:28,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 09:21:28,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:28,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:21:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:21:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 09:21:28,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:28,969 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:21:28,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:28,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:28,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:28,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:28,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:21:28,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:28,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:28,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:28,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:28,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:28,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:29,009 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 09:21:29,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954832608] [2020-10-14 09:21:29,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:21:29,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:21:29,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177422775] [2020-10-14 09:21:29,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:21:29,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:29,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:21:29,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:21:29,011 INFO L87 Difference]: Start difference. First operand 67500 states and 94499 transitions. Second operand 5 states. [2020-10-14 09:21:29,217 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-14 09:21:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:34,793 INFO L93 Difference]: Finished difference Result 151765 states and 211455 transitions. [2020-10-14 09:21:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:21:34,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-14 09:21:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:34,907 INFO L225 Difference]: With dead ends: 151765 [2020-10-14 09:21:34,907 INFO L226 Difference]: Without dead ends: 92987 [2020-10-14 09:21:34,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:21:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92987 states. [2020-10-14 09:21:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92987 to 74733. [2020-10-14 09:21:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74733 states. [2020-10-14 09:21:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74733 states to 74733 states and 104425 transitions. [2020-10-14 09:21:39,361 INFO L78 Accepts]: Start accepts. Automaton has 74733 states and 104425 transitions. Word has length 129 [2020-10-14 09:21:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:39,362 INFO L479 AbstractCegarLoop]: Abstraction has 74733 states and 104425 transitions. [2020-10-14 09:21:39,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:21:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 74733 states and 104425 transitions. [2020-10-14 09:21:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 09:21:39,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:39,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:21:39,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 09:21:39,394 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:39,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1430042313, now seen corresponding path program 1 times [2020-10-14 09:21:39,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:39,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627502572] [2020-10-14 09:21:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:39,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:39,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:39,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:39,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:39,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:41,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:41,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:41,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:41,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:41,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:41,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:41,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:42,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:42,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:44,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:44,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 09:21:44,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 09:21:44,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:21:44,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:44,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:21:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 09:21:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 09:21:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:44,584 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 09:21:44,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:44,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:44,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:44,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:44,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:44,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:21:44,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:44,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:44,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:44,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:44,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:44,616 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 09:21:44,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627502572] [2020-10-14 09:21:44,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:21:44,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:21:44,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995012633] [2020-10-14 09:21:44,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:21:44,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:44,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:21:44,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:21:44,617 INFO L87 Difference]: Start difference. First operand 74733 states and 104425 transitions. Second operand 4 states. [2020-10-14 09:21:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:50,555 INFO L93 Difference]: Finished difference Result 111105 states and 154770 transitions. [2020-10-14 09:21:50,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:21:50,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2020-10-14 09:21:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:50,645 INFO L225 Difference]: With dead ends: 111105 [2020-10-14 09:21:50,645 INFO L226 Difference]: Without dead ends: 74654 [2020-10-14 09:21:50,679 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 09:21:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74654 states. [2020-10-14 09:21:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74654 to 74652. [2020-10-14 09:21:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74652 states. [2020-10-14 09:21:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74652 states to 74652 states and 103510 transitions. [2020-10-14 09:21:55,347 INFO L78 Accepts]: Start accepts. Automaton has 74652 states and 103510 transitions. Word has length 130 [2020-10-14 09:21:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:55,347 INFO L479 AbstractCegarLoop]: Abstraction has 74652 states and 103510 transitions. [2020-10-14 09:21:55,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 74652 states and 103510 transitions. [2020-10-14 09:21:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 09:21:55,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:55,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:21:55,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 09:21:55,378 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash 123613682, now seen corresponding path program 1 times [2020-10-14 09:21:55,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:55,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451764146] [2020-10-14 09:21:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:55,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:55,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:55,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:55,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking...