/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.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:19:31,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:19:31,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:19:31,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:19:31,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:19:31,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:19:32,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:19:32,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:19:32,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:19:32,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:19:32,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:19:32,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:19:32,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:19:32,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:19:32,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:19:32,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:19:32,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:19:32,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:19:32,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:19:32,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:19:32,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:19:32,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:19:32,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:19:32,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:19:32,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:19:32,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:19:32,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:19:32,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:19:32,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:19:32,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:19:32,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:19:32,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:19:32,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:19:32,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:19:32,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:19:32,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:19:32,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:19:32,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:19:32,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:19:32,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:19:32,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:19:32,059 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 09:19:32,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:19:32,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:19:32,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:19:32,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:19:32,099 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:19:32,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:19:32,100 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:19:32,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:19:32,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:19:32,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:19:32,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:19:32,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:19:32,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:19:32,102 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:19:32,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:19:32,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:19:32,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:19:32,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:19:32,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:19:32,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:19:32,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:19:32,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:19:32,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:19:32,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:19:32,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:19:32,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:19:32,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:19:32,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:19:32,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:19:32,105 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 09:19:32,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:19:32,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:19:32,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:19:32,458 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:19:32,459 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:19:32,459 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:19:32,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f9c3bf47/813d14f4af604601a4a2a419a547d144/FLAGc4ee66fd7 [2020-10-14 09:19:33,028 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:19:33,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:19:33,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f9c3bf47/813d14f4af604601a4a2a419a547d144/FLAGc4ee66fd7 [2020-10-14 09:19:33,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f9c3bf47/813d14f4af604601a4a2a419a547d144 [2020-10-14 09:19:33,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:19:33,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:19:33,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:19:33,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:19:33,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:19:33,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:19:33" (1/1) ... [2020-10-14 09:19:33,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e60d8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33, skipping insertion in model container [2020-10-14 09:19:33,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:19:33" (1/1) ... [2020-10-14 09:19:33,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:19:33,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:19:33,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:19:33,821 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:19:33,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:19:33,922 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:19:33,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33 WrapperNode [2020-10-14 09:19:33,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:19:33,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:19:33,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:19:33,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:19:33,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33" (1/1) ... [2020-10-14 09:19:33,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33" (1/1) ... [2020-10-14 09:19:33,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33" (1/1) ... [2020-10-14 09:19:33,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33" (1/1) ... [2020-10-14 09:19:33,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33" (1/1) ... [2020-10-14 09:19:33,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33" (1/1) ... [2020-10-14 09:19:33,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33" (1/1) ... [2020-10-14 09:19:33,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:19:33,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:19:33,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:19:33,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:19:33,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:19:34,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:19:34,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:19:34,047 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:19:34,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:19:34,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:19:34,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:19:34,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:19:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 09:19:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:19:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:19:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:19:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:19:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:19:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:19:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:19:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:19:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:19:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 09:19:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:19:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:19:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:19:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:19:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:19:34,747 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:19:34,748 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:19:34,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:19:34 BoogieIcfgContainer [2020-10-14 09:19:34,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:19:34,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:19:34,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:19:34,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:19:34,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:19:33" (1/3) ... [2020-10-14 09:19:34,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f217a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:19:34, skipping insertion in model container [2020-10-14 09:19:34,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:33" (2/3) ... [2020-10-14 09:19:34,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f217a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:19:34, skipping insertion in model container [2020-10-14 09:19:34,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:19:34" (3/3) ... [2020-10-14 09:19:34,762 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:19:34,774 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:19:34,783 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:19:34,798 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:19:34,826 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:19:34,826 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:19:34,826 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:19:34,826 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:19:34,827 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:19:34,827 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:19:34,827 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:19:34,827 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:19:34,850 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2020-10-14 09:19:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 09:19:34,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:34,863 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] [2020-10-14 09:19:34,863 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:34,869 INFO L82 PathProgramCache]: Analyzing trace with hash 153946672, now seen corresponding path program 1 times [2020-10-14 09:19:34,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:34,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119145894] [2020-10-14 09:19:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:35,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:35,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:35,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:35,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:36,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:39,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:39,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 09:19:39,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:19:39,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4443 [2020-10-14 09:19:39,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:39,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:39,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:19:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:19:39,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:19:39,948 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:19:39,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:39,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:39,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:39,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:39,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:39,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 09:19:39,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:39,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:39,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:40,009 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 09:19:40,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119145894] [2020-10-14 09:19:40,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:40,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:40,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303025314] [2020-10-14 09:19:40,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:40,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:40,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:40,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:40,040 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 4 states. [2020-10-14 09:19:40,292 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:19:41,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:41,148 INFO L93 Difference]: Finished difference Result 335 states and 535 transitions. [2020-10-14 09:19:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:41,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-14 09:19:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:41,166 INFO L225 Difference]: With dead ends: 335 [2020-10-14 09:19:41,166 INFO L226 Difference]: Without dead ends: 223 [2020-10-14 09:19:41,170 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 09:19:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-14 09:19:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2020-10-14 09:19:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-14 09:19:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 329 transitions. [2020-10-14 09:19:41,236 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 329 transitions. Word has length 65 [2020-10-14 09:19:41,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:41,237 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 329 transitions. [2020-10-14 09:19:41,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:41,237 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 329 transitions. [2020-10-14 09:19:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:19:41,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:41,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:41,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:19:41,241 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:41,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1938859076, now seen corresponding path program 1 times [2020-10-14 09:19:41,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:41,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137607477] [2020-10-14 09:19:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:41,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:41,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:41,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:41,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:43,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:43,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:19:43,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:19:43,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1768 [2020-10-14 09:19:43,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:43,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:43,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:43,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 09:19:43,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 09:19:43,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:43,313 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:19:43,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:43,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:43,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:43,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:43,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:43,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:19:43,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:43,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:43,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:43,358 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 09:19:43,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137607477] [2020-10-14 09:19:43,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:43,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:43,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877488493] [2020-10-14 09:19:43,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:43,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:43,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:43,363 INFO L87 Difference]: Start difference. First operand 221 states and 329 transitions. Second operand 4 states. [2020-10-14 09:19:43,555 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:19:44,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:44,132 INFO L93 Difference]: Finished difference Result 553 states and 857 transitions. [2020-10-14 09:19:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:44,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-14 09:19:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:44,140 INFO L225 Difference]: With dead ends: 553 [2020-10-14 09:19:44,141 INFO L226 Difference]: Without dead ends: 371 [2020-10-14 09:19:44,143 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 09:19:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-10-14 09:19:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 369. [2020-10-14 09:19:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-14 09:19:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 564 transitions. [2020-10-14 09:19:44,203 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 564 transitions. Word has length 66 [2020-10-14 09:19:44,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:44,204 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 564 transitions. [2020-10-14 09:19:44,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 564 transitions. [2020-10-14 09:19:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:19:44,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:44,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:44,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:19:44,207 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:44,208 INFO L82 PathProgramCache]: Analyzing trace with hash 626940441, now seen corresponding path program 1 times [2020-10-14 09:19:44,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:44,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12279882] [2020-10-14 09:19:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:44,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:44,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:44,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:44,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:44,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:19:44,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:19:44,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-14 09:19:44,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:44,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:44,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:44,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:19:44,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:19:44,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:45,166 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:19:45,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:45,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:45,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:45,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:45,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:45,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:19:45,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:45,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:45,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:45,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:45,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:45,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:45,210 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 09:19:45,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12279882] [2020-10-14 09:19:45,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:45,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:45,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886953314] [2020-10-14 09:19:45,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:45,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:45,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:45,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:45,214 INFO L87 Difference]: Start difference. First operand 369 states and 564 transitions. Second operand 4 states. [2020-10-14 09:19:45,420 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:19:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:46,131 INFO L93 Difference]: Finished difference Result 965 states and 1510 transitions. [2020-10-14 09:19:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:46,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:19:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:46,138 INFO L225 Difference]: With dead ends: 965 [2020-10-14 09:19:46,138 INFO L226 Difference]: Without dead ends: 635 [2020-10-14 09:19:46,143 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 09:19:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2020-10-14 09:19:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 633. [2020-10-14 09:19:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-10-14 09:19:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 980 transitions. [2020-10-14 09:19:46,241 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 980 transitions. Word has length 67 [2020-10-14 09:19:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:46,242 INFO L479 AbstractCegarLoop]: Abstraction has 633 states and 980 transitions. [2020-10-14 09:19:46,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 980 transitions. [2020-10-14 09:19:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:19:46,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:46,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:46,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:19:46,246 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:46,247 INFO L82 PathProgramCache]: Analyzing trace with hash 905955225, now seen corresponding path program 1 times [2020-10-14 09:19:46,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:46,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855974371] [2020-10-14 09:19:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:46,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:46,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:46,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:46,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:19:46,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:19:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-14 09:19:46,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:46,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:19:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 09:19:46,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:46,878 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:19:46,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:46,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:46,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:46,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:46,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:46,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:19:46,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:46,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:46,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:46,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:46,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:46,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:46,914 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 09:19:46,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855974371] [2020-10-14 09:19:46,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:46,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:46,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453353087] [2020-10-14 09:19:46,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:46,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:46,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:46,917 INFO L87 Difference]: Start difference. First operand 633 states and 980 transitions. Second operand 4 states. [2020-10-14 09:19:47,092 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:19:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:47,843 INFO L93 Difference]: Finished difference Result 1693 states and 2654 transitions. [2020-10-14 09:19:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:47,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 09:19:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:47,850 INFO L225 Difference]: With dead ends: 1693 [2020-10-14 09:19:47,851 INFO L226 Difference]: Without dead ends: 1099 [2020-10-14 09:19:47,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:19:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-10-14 09:19:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1097. [2020-10-14 09:19:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2020-10-14 09:19:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1704 transitions. [2020-10-14 09:19:47,911 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1704 transitions. Word has length 68 [2020-10-14 09:19:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:47,913 INFO L479 AbstractCegarLoop]: Abstraction has 1097 states and 1704 transitions. [2020-10-14 09:19:47,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1704 transitions. [2020-10-14 09:19:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 09:19:47,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:47,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:47,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:19:47,919 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1767560558, now seen corresponding path program 1 times [2020-10-14 09:19:47,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:47,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729880608] [2020-10-14 09:19:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:47,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:48,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:49,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:49,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 09:19:49,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:19:49,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-14 09:19:49,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:49,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 09:19:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:19:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 09:19:49,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:49,216 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:19:49,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:49,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:49,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:49,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:49,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:49,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:19:49,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:49,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:49,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:49,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:49,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:49,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:49,263 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 09:19:49,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729880608] [2020-10-14 09:19:49,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:49,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 09:19:49,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540762302] [2020-10-14 09:19:49,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 09:19:49,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:49,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 09:19:49,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 09:19:49,266 INFO L87 Difference]: Start difference. First operand 1097 states and 1704 transitions. Second operand 8 states. [2020-10-14 09:19:49,492 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 09:19:50,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:50,331 INFO L93 Difference]: Finished difference Result 7445 states and 11694 transitions. [2020-10-14 09:19:50,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:19:50,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-14 09:19:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:50,369 INFO L225 Difference]: With dead ends: 7445 [2020-10-14 09:19:50,370 INFO L226 Difference]: Without dead ends: 6387 [2020-10-14 09:19:50,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:19:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2020-10-14 09:19:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 2153. [2020-10-14 09:19:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2153 states. [2020-10-14 09:19:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3336 transitions. [2020-10-14 09:19:50,567 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3336 transitions. Word has length 69 [2020-10-14 09:19:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:50,567 INFO L479 AbstractCegarLoop]: Abstraction has 2153 states and 3336 transitions. [2020-10-14 09:19:50,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 09:19:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3336 transitions. [2020-10-14 09:19:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:19:50,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:50,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:50,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:19:50,570 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:50,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1058730260, now seen corresponding path program 1 times [2020-10-14 09:19:50,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:50,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899156611] [2020-10-14 09:19:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:50,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:50,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:51,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:51,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:19:51,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:19:51,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-14 09:19:51,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:51,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:51,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:19:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-14 09:19:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:19:51,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:51,393 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:19:51,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:51,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:51,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:51,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:51,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:51,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:19:51,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:51,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:51,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:51,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:51,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:51,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:51,429 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 09:19:51,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899156611] [2020-10-14 09:19:51,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:51,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:19:51,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433079379] [2020-10-14 09:19:51,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:19:51,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:51,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:19:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:19:51,432 INFO L87 Difference]: Start difference. First operand 2153 states and 3336 transitions. Second operand 5 states. [2020-10-14 09:19:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:52,553 INFO L93 Difference]: Finished difference Result 4331 states and 6697 transitions. [2020-10-14 09:19:52,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:19:52,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 09:19:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:52,578 INFO L225 Difference]: With dead ends: 4331 [2020-10-14 09:19:52,578 INFO L226 Difference]: Without dead ends: 4329 [2020-10-14 09:19:52,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:19:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2020-10-14 09:19:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 2217. [2020-10-14 09:19:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2217 states. [2020-10-14 09:19:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3400 transitions. [2020-10-14 09:19:52,781 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3400 transitions. Word has length 70 [2020-10-14 09:19:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:52,781 INFO L479 AbstractCegarLoop]: Abstraction has 2217 states and 3400 transitions. [2020-10-14 09:19:52,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:19:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3400 transitions. [2020-10-14 09:19:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 09:19:52,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:52,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:52,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:19:52,783 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1548720093, now seen corresponding path program 1 times [2020-10-14 09:19:52,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:52,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344868596] [2020-10-14 09:19:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:52,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:52,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:53,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:53,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 09:19:53,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:19:53,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 704 [2020-10-14 09:19:53,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:53,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:19:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 09:19:53,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:53,688 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:19:53,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:53,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:53,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:53,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:53,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:53,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:19:53,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:53,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:53,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:53,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:53,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:53,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:53,723 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 09:19:53,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344868596] [2020-10-14 09:19:53,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:53,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:53,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173777934] [2020-10-14 09:19:53,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:53,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:53,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:53,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:53,725 INFO L87 Difference]: Start difference. First operand 2217 states and 3400 transitions. Second operand 4 states. [2020-10-14 09:19:53,886 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:19:54,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:54,688 INFO L93 Difference]: Finished difference Result 6349 states and 9738 transitions. [2020-10-14 09:19:54,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:54,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 09:19:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:54,709 INFO L225 Difference]: With dead ends: 6349 [2020-10-14 09:19:54,709 INFO L226 Difference]: Without dead ends: 4171 [2020-10-14 09:19:54,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:19:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2020-10-14 09:19:54,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4137. [2020-10-14 09:19:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4137 states. [2020-10-14 09:19:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4137 states to 4137 states and 6280 transitions. [2020-10-14 09:19:55,011 INFO L78 Accepts]: Start accepts. Automaton has 4137 states and 6280 transitions. Word has length 71 [2020-10-14 09:19:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:55,012 INFO L479 AbstractCegarLoop]: Abstraction has 4137 states and 6280 transitions. [2020-10-14 09:19:55,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4137 states and 6280 transitions. [2020-10-14 09:19:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 09:19:55,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:55,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:19:55,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:19:55,014 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:55,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:55,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2111679324, now seen corresponding path program 1 times [2020-10-14 09:19:55,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:55,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026752516] [2020-10-14 09:19:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:55,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:55,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:55,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:55,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 09:19:55,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:19:55,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-14 09:19:55,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:55,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:55,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:19:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:19:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:19:55,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:55,427 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:19:55,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:55,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:55,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:55,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:55,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:55,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:19:55,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:55,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:55,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:55,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:55,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:55,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:55,459 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 09:19:55,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026752516] [2020-10-14 09:19:55,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:19:55,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:19:55,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366161036] [2020-10-14 09:19:55,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:19:55,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:55,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:19:55,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:19:55,462 INFO L87 Difference]: Start difference. First operand 4137 states and 6280 transitions. Second operand 4 states. [2020-10-14 09:19:55,621 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:19:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:56,742 INFO L93 Difference]: Finished difference Result 7920 states and 12078 transitions. [2020-10-14 09:19:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:19:56,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-14 09:19:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:56,773 INFO L225 Difference]: With dead ends: 7920 [2020-10-14 09:19:56,773 INFO L226 Difference]: Without dead ends: 5741 [2020-10-14 09:19:56,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:19:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5741 states. [2020-10-14 09:19:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5741 to 5739. [2020-10-14 09:19:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5739 states. [2020-10-14 09:19:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 8682 transitions. [2020-10-14 09:19:57,162 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 8682 transitions. Word has length 72 [2020-10-14 09:19:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:19:57,162 INFO L479 AbstractCegarLoop]: Abstraction has 5739 states and 8682 transitions. [2020-10-14 09:19:57,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:19:57,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 8682 transitions. [2020-10-14 09:19:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 09:19:57,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:57,167 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:19:57,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:19:57,168 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:57,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1472051162, now seen corresponding path program 1 times [2020-10-14 09:19:57,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:57,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038002346] [2020-10-14 09:19:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:57,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:57,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:58,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:58,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 09:19:58,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:19:58,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-10-14 09:19:58,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:58,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:19:58,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:19:58,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 09:19:58,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:19:58,308 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:19:58,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:19:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:58,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:58,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:19:58,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:19:58,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:19:58,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:19:58,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:19:58,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:19:58,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:19:58,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:19:58,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:19:58,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:19:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:19:58,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038002346] [2020-10-14 09:19:58,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:19:58,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:19:58,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863077574] [2020-10-14 09:19:58,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:19:58,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:19:58,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:19:58,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:19:58,384 INFO L87 Difference]: Start difference. First operand 5739 states and 8682 transitions. Second operand 5 states. [2020-10-14 09:19:58,585 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 09:20:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:00,045 INFO L93 Difference]: Finished difference Result 13201 states and 20045 transitions. [2020-10-14 09:20:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:20:00,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-10-14 09:20:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:00,103 INFO L225 Difference]: With dead ends: 13201 [2020-10-14 09:20:00,103 INFO L226 Difference]: Without dead ends: 9423 [2020-10-14 09:20:00,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:20:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9423 states. [2020-10-14 09:20:00,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9423 to 9387. [2020-10-14 09:20:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9387 states. [2020-10-14 09:20:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 14154 transitions. [2020-10-14 09:20:00,880 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 14154 transitions. Word has length 98 [2020-10-14 09:20:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:00,880 INFO L479 AbstractCegarLoop]: Abstraction has 9387 states and 14154 transitions. [2020-10-14 09:20:00,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:20:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 14154 transitions. [2020-10-14 09:20:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 09:20:00,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:00,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:20:00,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:20:00,886 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:00,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1917344406, now seen corresponding path program 1 times [2020-10-14 09:20:00,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:00,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17032049] [2020-10-14 09:20:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:00,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:00,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:01,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:01,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:01,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:01,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:03,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:05,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:05,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 09:20:05,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:20:05,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:20:05,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:05,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-14 09:20:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:20:05,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:06,128 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:20:06,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:06,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:06,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:06,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:06,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:06,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:20:06,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:06,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:06,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:06,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17032049] [2020-10-14 09:20:06,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:06,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:06,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362730927] [2020-10-14 09:20:06,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:06,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:06,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:06,191 INFO L87 Difference]: Start difference. First operand 9387 states and 14154 transitions. Second operand 4 states. [2020-10-14 09:20:06,428 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:20:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:08,497 INFO L93 Difference]: Finished difference Result 27199 states and 40940 transitions. [2020-10-14 09:20:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:08,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-14 09:20:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:08,543 INFO L225 Difference]: With dead ends: 27199 [2020-10-14 09:20:08,544 INFO L226 Difference]: Without dead ends: 17853 [2020-10-14 09:20:08,565 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 09:20:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17853 states. [2020-10-14 09:20:09,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17853 to 17851. [2020-10-14 09:20:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17851 states. [2020-10-14 09:20:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17851 states to 17851 states and 26666 transitions. [2020-10-14 09:20:09,451 INFO L78 Accepts]: Start accepts. Automaton has 17851 states and 26666 transitions. Word has length 98 [2020-10-14 09:20:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:09,452 INFO L479 AbstractCegarLoop]: Abstraction has 17851 states and 26666 transitions. [2020-10-14 09:20:09,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 17851 states and 26666 transitions. [2020-10-14 09:20:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 09:20:09,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:09,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:20:09,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:20:09,464 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:09,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:09,464 INFO L82 PathProgramCache]: Analyzing trace with hash 438893557, now seen corresponding path program 1 times [2020-10-14 09:20:09,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:09,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234519039] [2020-10-14 09:20:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:09,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:09,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:09,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:10,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:10,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:11,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:14,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:14,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 09:20:14,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:20:14,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 09:20:14,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:14,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:14,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-14 09:20:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:20:14,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:14,673 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:20:14,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:14,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:14,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:14,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:14,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:14,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:20:14,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:14,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:14,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:14,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:14,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:14,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:14,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234519039] [2020-10-14 09:20:14,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:14,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:14,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349370585] [2020-10-14 09:20:14,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:14,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:14,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:14,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:14,719 INFO L87 Difference]: Start difference. First operand 17851 states and 26666 transitions. Second operand 4 states. [2020-10-14 09:20:14,893 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:20:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:16,784 INFO L93 Difference]: Finished difference Result 51711 states and 77036 transitions. [2020-10-14 09:20:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:16,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-14 09:20:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:16,865 INFO L225 Difference]: With dead ends: 51711 [2020-10-14 09:20:16,866 INFO L226 Difference]: Without dead ends: 33901 [2020-10-14 09:20:16,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33901 states. [2020-10-14 09:20:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33901 to 33899. [2020-10-14 09:20:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33899 states. [2020-10-14 09:20:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33899 states to 33899 states and 50090 transitions. [2020-10-14 09:20:18,671 INFO L78 Accepts]: Start accepts. Automaton has 33899 states and 50090 transitions. Word has length 98 [2020-10-14 09:20:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:18,672 INFO L479 AbstractCegarLoop]: Abstraction has 33899 states and 50090 transitions. [2020-10-14 09:20:18,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 33899 states and 50090 transitions. [2020-10-14 09:20:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 09:20:18,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:18,683 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:20:18,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:20:18,684 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:18,684 INFO L82 PathProgramCache]: Analyzing trace with hash -47942274, now seen corresponding path program 1 times [2020-10-14 09:20:18,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:18,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043206762] [2020-10-14 09:20:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:18,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:18,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:18,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:18,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:19,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:19,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:19,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:23,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:23,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 09:20:23,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:20:23,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:20:23,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:23,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:23,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:23,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 09:20:23,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 09:20:23,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:23,870 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:20:23,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:23,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:23,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:23,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:23,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:20:23,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:23,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:23,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:23,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:23,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:23,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:23,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043206762] [2020-10-14 09:20:23,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:23,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:23,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867340043] [2020-10-14 09:20:23,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:23,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:23,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:23,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:23,904 INFO L87 Difference]: Start difference. First operand 33899 states and 50090 transitions. Second operand 4 states. [2020-10-14 09:20:24,087 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:20:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:27,493 INFO L93 Difference]: Finished difference Result 98095 states and 144428 transitions. [2020-10-14 09:20:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:27,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-14 09:20:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:27,587 INFO L225 Difference]: With dead ends: 98095 [2020-10-14 09:20:27,588 INFO L226 Difference]: Without dead ends: 64237 [2020-10-14 09:20:27,656 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 09:20:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64237 states. [2020-10-14 09:20:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64237 to 64235. [2020-10-14 09:20:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64235 states. [2020-10-14 09:20:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64235 states to 64235 states and 93738 transitions. [2020-10-14 09:20:32,334 INFO L78 Accepts]: Start accepts. Automaton has 64235 states and 93738 transitions. Word has length 98 [2020-10-14 09:20:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:32,334 INFO L479 AbstractCegarLoop]: Abstraction has 64235 states and 93738 transitions. [2020-10-14 09:20:32,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 64235 states and 93738 transitions. [2020-10-14 09:20:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 09:20:32,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:32,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:20:32,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:20:32,348 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:32,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:32,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1483438239, now seen corresponding path program 1 times [2020-10-14 09:20:32,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:32,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261830946] [2020-10-14 09:20:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:32,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:32,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:32,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:32,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:32,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:32,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:33,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:37,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:37,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 09:20:37,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:20:37,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:20:37,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:37,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 09:20:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 09:20:37,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:37,532 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:20:37,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:37,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:37,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:37,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:37,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:37,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:20:37,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:37,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:37,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:37,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:37,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:37,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:37,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261830946] [2020-10-14 09:20:37,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:37,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:37,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125010306] [2020-10-14 09:20:37,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:37,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:37,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:37,566 INFO L87 Difference]: Start difference. First operand 64235 states and 93738 transitions. Second operand 4 states. [2020-10-14 09:20:37,737 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:20:43,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:43,536 INFO L93 Difference]: Finished difference Result 185583 states and 269612 transitions. [2020-10-14 09:20:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:43,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-14 09:20:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:43,727 INFO L225 Difference]: With dead ends: 185583 [2020-10-14 09:20:43,727 INFO L226 Difference]: Without dead ends: 121389 [2020-10-14 09:20:43,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121389 states. [2020-10-14 09:20:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121389 to 121387. [2020-10-14 09:20:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121387 states. [2020-10-14 09:20:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121387 states to 121387 states and 174634 transitions. [2020-10-14 09:20:51,339 INFO L78 Accepts]: Start accepts. Automaton has 121387 states and 174634 transitions. Word has length 98 [2020-10-14 09:20:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:51,340 INFO L479 AbstractCegarLoop]: Abstraction has 121387 states and 174634 transitions. [2020-10-14 09:20:51,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 121387 states and 174634 transitions. [2020-10-14 09:20:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 09:20:51,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:51,357 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:20:51,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:20:51,357 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:51,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1137773761, now seen corresponding path program 1 times [2020-10-14 09:20:51,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:51,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498845445] [2020-10-14 09:20:51,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:51,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:51,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:51,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:51,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:53,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:56,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:56,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 09:20:56,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:20:56,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:20:56,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:56,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:56,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:56,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 09:20:56,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:20:56,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:56,533 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:20:56,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:56,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:56,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:56,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:56,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:56,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:20:56,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:56,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:56,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:56,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498845445] [2020-10-14 09:20:56,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:56,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:56,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139650958] [2020-10-14 09:20:56,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:56,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:56,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:56,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:56,563 INFO L87 Difference]: Start difference. First operand 121387 states and 174634 transitions. Second operand 4 states. [2020-10-14 09:20:56,727 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:21:07,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:07,427 INFO L93 Difference]: Finished difference Result 348207 states and 498220 transitions. [2020-10-14 09:21:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:21:07,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-14 09:21:07,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:07,785 INFO L225 Difference]: With dead ends: 348207 [2020-10-14 09:21:07,785 INFO L226 Difference]: Without dead ends: 226861 [2020-10-14 09:21:07,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:21:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226861 states. [2020-10-14 09:21:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226861 to 226859. [2020-10-14 09:21:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226859 states. [2020-10-14 09:21:22,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226859 states to 226859 states and 321066 transitions. [2020-10-14 09:21:22,790 INFO L78 Accepts]: Start accepts. Automaton has 226859 states and 321066 transitions. Word has length 99 [2020-10-14 09:21:22,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:22,790 INFO L479 AbstractCegarLoop]: Abstraction has 226859 states and 321066 transitions. [2020-10-14 09:21:22,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 226859 states and 321066 transitions. [2020-10-14 09:21:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 09:21:22,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:22,820 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:21:22,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:21:22,821 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash -582114856, now seen corresponding path program 1 times [2020-10-14 09:21:22,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:22,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830472859] [2020-10-14 09:21:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:25,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:25,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:25,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:26,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:26,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:28,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:28,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 09:21:28,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:21:28,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3211 [2020-10-14 09:21:28,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:28,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:21:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:21:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:21:28,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:29,112 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:21:29,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:29,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:29,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:29,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:29,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:29,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:21:29,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:29,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:29,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:21:29,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830472859] [2020-10-14 09:21:29,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:21:29,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:21:29,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675794036] [2020-10-14 09:21:29,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:21:29,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:29,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:21:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:21:29,141 INFO L87 Difference]: Start difference. First operand 226859 states and 321066 transitions. Second operand 4 states. [2020-10-14 09:21:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:37,663 INFO L93 Difference]: Finished difference Result 383789 states and 543429 transitions. [2020-10-14 09:21:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:21:37,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-14 09:21:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:38,461 INFO L225 Difference]: With dead ends: 383789 [2020-10-14 09:21:38,461 INFO L226 Difference]: Without dead ends: 156971 [2020-10-14 09:21:38,617 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 09:21:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156971 states. [2020-10-14 09:21:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156971 to 156969. [2020-10-14 09:21:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156969 states. [2020-10-14 09:21:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156969 states to 156969 states and 220323 transitions. [2020-10-14 09:21:51,651 INFO L78 Accepts]: Start accepts. Automaton has 156969 states and 220323 transitions. Word has length 100 [2020-10-14 09:21:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:51,651 INFO L479 AbstractCegarLoop]: Abstraction has 156969 states and 220323 transitions. [2020-10-14 09:21:51,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 156969 states and 220323 transitions. [2020-10-14 09:21:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 09:21:51,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:51,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:21:51,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:21:51,668 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:51,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:51,668 INFO L82 PathProgramCache]: Analyzing trace with hash 427734707, now seen corresponding path program 1 times [2020-10-14 09:21:51,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:51,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402294972] [2020-10-14 09:21:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:51,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:51,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:51,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:51,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:52,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:53,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:53,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-14 09:21:53,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:21:53,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1851 [2020-10-14 09:21:53,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:53,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:21:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:21:53,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 09:21:53,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:53,710 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 09:21:53,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:53,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:53,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:53,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:53,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:53,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:21:53,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:53,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:53,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:53,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:53,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:53,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:21:53,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402294972] [2020-10-14 09:21:53,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:21:53,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:21:53,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872494936] [2020-10-14 09:21:53,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:21:53,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:53,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:21:53,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:21:53,739 INFO L87 Difference]: Start difference. First operand 156969 states and 220323 transitions. Second operand 6 states. [2020-10-14 09:21:53,910 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-14 09:22:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:22:36,548 INFO L93 Difference]: Finished difference Result 865657 states and 1211135 transitions. [2020-10-14 09:22:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:22:36,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-14 09:22:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:22:37,657 INFO L225 Difference]: With dead ends: 865657 [2020-10-14 09:22:37,657 INFO L226 Difference]: Without dead ends: 712763 [2020-10-14 09:22:37,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:22:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712763 states.