/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.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:14:33,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:14:33,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:14:33,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:14:33,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:14:33,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:14:33,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:14:33,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:14:33,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:14:33,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:14:33,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:14:33,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:14:33,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:14:33,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:14:33,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:14:33,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:14:33,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:14:33,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:14:33,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:14:33,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:14:33,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:14:33,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:14:33,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:14:33,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:14:33,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:14:33,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:14:33,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:14:33,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:14:33,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:14:33,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:14:33,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:14:33,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:14:33,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:14:33,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:14:33,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:14:33,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:14:33,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:14:33,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:14:33,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:14:33,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:14:33,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:14:33,129 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 09:14:33,151 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:14:33,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:14:33,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:14:33,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:14:33,157 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:14:33,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:14:33,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:14:33,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:14:33,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:14:33,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:14:33,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:14:33,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:14:33,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:14:33,160 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:14:33,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:14:33,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:14:33,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:14:33,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:14:33,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:14:33,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:14:33,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:14:33,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:14:33,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:14:33,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:14:33,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:14:33,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:14:33,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:14:33,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:14:33,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:14:33,166 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 09:14:33,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:14:33,538 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:14:33,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:14:33,544 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:14:33,544 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:14:33,545 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-14 09:14:33,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bb34c876/c529d5a340f947a9847386d83a0e8317/FLAG766257a1d [2020-10-14 09:14:34,152 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:14:34,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-14 09:14:34,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bb34c876/c529d5a340f947a9847386d83a0e8317/FLAG766257a1d [2020-10-14 09:14:34,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bb34c876/c529d5a340f947a9847386d83a0e8317 [2020-10-14 09:14:34,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:14:34,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:14:34,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:14:34,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:14:34,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:14:34,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:14:34" (1/1) ... [2020-10-14 09:14:34,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2493e6f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:34, skipping insertion in model container [2020-10-14 09:14:34,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:14:34" (1/1) ... [2020-10-14 09:14:34,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:14:34,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:14:34,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:14:34,960 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:14:35,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:14:35,104 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:14:35,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:35 WrapperNode [2020-10-14 09:14:35,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:14:35,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:14:35,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:14:35,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:14:35,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:35" (1/1) ... [2020-10-14 09:14:35,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:35" (1/1) ... [2020-10-14 09:14:35,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:35" (1/1) ... [2020-10-14 09:14:35,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:35" (1/1) ... [2020-10-14 09:14:35,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:35" (1/1) ... [2020-10-14 09:14:35,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:35" (1/1) ... [2020-10-14 09:14:35,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:35" (1/1) ... [2020-10-14 09:14:35,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:14:35,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:14:35,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:14:35,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:14:35,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:14:35,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:14:35,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:14:35,244 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:14:35,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:14:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:14:35,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:14:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:14:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:14:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:14:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:14:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:14:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:14:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:14:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:14:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:14:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:14:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 09:14:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:14:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:14:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:14:35,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:14:35,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:14:35,986 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:14:35,986 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:14:35,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:14:35 BoogieIcfgContainer [2020-10-14 09:14:35,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:14:35,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:14:35,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:14:35,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:14:35,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:14:34" (1/3) ... [2020-10-14 09:14:35,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718d4658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:14:35, skipping insertion in model container [2020-10-14 09:14:35,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:14:35" (2/3) ... [2020-10-14 09:14:36,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718d4658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:14:35, skipping insertion in model container [2020-10-14 09:14:36,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:14:35" (3/3) ... [2020-10-14 09:14:36,002 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-14 09:14:36,013 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:14:36,021 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:14:36,036 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:14:36,064 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:14:36,064 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:14:36,064 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:14:36,064 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:14:36,065 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:14:36,065 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:14:36,065 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:14:36,065 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:14:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states. [2020-10-14 09:14:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 09:14:36,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:36,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:14:36,102 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:36,109 INFO L82 PathProgramCache]: Analyzing trace with hash -153114197, now seen corresponding path program 1 times [2020-10-14 09:14:36,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:36,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372399721] [2020-10-14 09:14:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:36,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:36,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:36,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:37,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:37,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:38,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:41,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:41,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 09:14:41,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:14:41,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 09:14:41,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:41,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:41,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:14:41,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:14:41,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:14:41,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:14:41,921 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:14:41,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:41,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:41,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:41,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:41,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:41,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-14 09:14:41,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:41,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:41,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:41,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:41,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:41,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:41,993 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 09:14:41,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372399721] [2020-10-14 09:14:41,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:14:41,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:14:41,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719831406] [2020-10-14 09:14:42,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:14:42,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:42,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:14:42,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:14:42,023 INFO L87 Difference]: Start difference. First operand 141 states. Second operand 4 states. [2020-10-14 09:14:42,285 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:14:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:43,217 INFO L93 Difference]: Finished difference Result 329 states and 529 transitions. [2020-10-14 09:14:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:14:43,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-14 09:14:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:43,241 INFO L225 Difference]: With dead ends: 329 [2020-10-14 09:14:43,242 INFO L226 Difference]: Without dead ends: 219 [2020-10-14 09:14:43,247 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 09:14:43,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-14 09:14:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-10-14 09:14:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-14 09:14:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 323 transitions. [2020-10-14 09:14:43,341 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 323 transitions. Word has length 64 [2020-10-14 09:14:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:43,342 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 323 transitions. [2020-10-14 09:14:43,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:14:43,342 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 323 transitions. [2020-10-14 09:14:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 09:14:43,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:43,346 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 09:14:43,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:14:43,347 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:43,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:43,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1009906726, now seen corresponding path program 1 times [2020-10-14 09:14:43,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:43,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262607867] [2020-10-14 09:14:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:43,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:43,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:43,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:43,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:44,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:47,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:47,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 09:14:47,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:14:47,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3801 [2020-10-14 09:14:47,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:47,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:14:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 09:14:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:14:47,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:47,497 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:14:47,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:47,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:47,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:47,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:47,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:47,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 09:14:47,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:47,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:47,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:47,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:47,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:14:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:14:47,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262607867] [2020-10-14 09:14:47,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:14:47,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:14:47,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575177545] [2020-10-14 09:14:47,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:14:47,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:14:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:14:47,566 INFO L87 Difference]: Start difference. First operand 217 states and 323 transitions. Second operand 4 states. [2020-10-14 09:14:47,839 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:14:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:48,464 INFO L93 Difference]: Finished difference Result 541 states and 839 transitions. [2020-10-14 09:14:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:14:48,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-14 09:14:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:48,471 INFO L225 Difference]: With dead ends: 541 [2020-10-14 09:14:48,471 INFO L226 Difference]: Without dead ends: 363 [2020-10-14 09:14:48,476 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 09:14:48,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-14 09:14:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2020-10-14 09:14:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-14 09:14:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 552 transitions. [2020-10-14 09:14:48,532 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 552 transitions. Word has length 65 [2020-10-14 09:14:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:48,532 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 552 transitions. [2020-10-14 09:14:48,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:14:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 552 transitions. [2020-10-14 09:14:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:14:48,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:48,535 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 09:14:48,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:14:48,536 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:48,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1894188660, now seen corresponding path program 1 times [2020-10-14 09:14:48,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:48,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054129389] [2020-10-14 09:14:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:48,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:48,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:48,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:49,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:49,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:14:49,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:14:49,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-14 09:14:49,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:49,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:14:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:14:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:14:49,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:50,128 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:14:50,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:50,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:50,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:50,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:50,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:50,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:14:50,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:50,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:50,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:50,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:50,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:50,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:50,163 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 09:14:50,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054129389] [2020-10-14 09:14:50,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:14:50,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:14:50,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631258071] [2020-10-14 09:14:50,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:14:50,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:50,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:14:50,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:14:50,167 INFO L87 Difference]: Start difference. First operand 361 states and 552 transitions. Second operand 4 states. [2020-10-14 09:14:50,362 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:14:51,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:51,045 INFO L93 Difference]: Finished difference Result 941 states and 1474 transitions. [2020-10-14 09:14:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:14:51,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-14 09:14:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:51,050 INFO L225 Difference]: With dead ends: 941 [2020-10-14 09:14:51,050 INFO L226 Difference]: Without dead ends: 619 [2020-10-14 09:14:51,052 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 09:14:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-10-14 09:14:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-10-14 09:14:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-10-14 09:14:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 956 transitions. [2020-10-14 09:14:51,086 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 956 transitions. Word has length 66 [2020-10-14 09:14:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:51,086 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 956 transitions. [2020-10-14 09:14:51,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:14:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 956 transitions. [2020-10-14 09:14:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:14:51,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:51,089 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 09:14:51,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:14:51,090 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:51,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1956941328, now seen corresponding path program 1 times [2020-10-14 09:14:51,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:51,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268681736] [2020-10-14 09:14:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:51,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:51,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:51,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:51,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:51,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:14:51,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:14:51,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 708 [2020-10-14 09:14:51,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:51,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:14:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:14:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:14:51,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:52,073 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:14:52,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:52,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:52,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:52,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:52,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:52,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:14:52,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:52,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:52,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:52,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:52,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:52,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:52,105 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 09:14:52,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268681736] [2020-10-14 09:14:52,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:14:52,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:14:52,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804877459] [2020-10-14 09:14:52,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:14:52,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:14:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:14:52,109 INFO L87 Difference]: Start difference. First operand 617 states and 956 transitions. Second operand 4 states. [2020-10-14 09:14:52,288 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:14:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:53,078 INFO L93 Difference]: Finished difference Result 1645 states and 2582 transitions. [2020-10-14 09:14:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:14:53,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:14:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:53,085 INFO L225 Difference]: With dead ends: 1645 [2020-10-14 09:14:53,086 INFO L226 Difference]: Without dead ends: 1067 [2020-10-14 09:14:53,088 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 09:14:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-10-14 09:14:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1065. [2020-10-14 09:14:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2020-10-14 09:14:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1656 transitions. [2020-10-14 09:14:53,140 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1656 transitions. Word has length 67 [2020-10-14 09:14:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:53,140 INFO L479 AbstractCegarLoop]: Abstraction has 1065 states and 1656 transitions. [2020-10-14 09:14:53,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:14:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1656 transitions. [2020-10-14 09:14:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:14:53,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:53,143 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 09:14:53,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:14:53,143 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:53,144 INFO L82 PathProgramCache]: Analyzing trace with hash 865140148, now seen corresponding path program 1 times [2020-10-14 09:14:53,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:53,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558402091] [2020-10-14 09:14:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:53,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:53,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:53,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:53,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:14:53,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:14:53,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-14 09:14:53,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:53,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:53,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:14:53,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:14:53,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:14:53,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:53,931 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:14:53,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:53,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:53,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:53,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:53,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:53,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:14:53,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:53,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:53,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:53,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:53,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:53,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:53,963 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 09:14:53,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558402091] [2020-10-14 09:14:53,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:14:53,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:14:53,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692873613] [2020-10-14 09:14:53,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:14:53,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:53,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:14:53,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:14:53,966 INFO L87 Difference]: Start difference. First operand 1065 states and 1656 transitions. Second operand 4 states. [2020-10-14 09:14:54,135 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:14:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:54,955 INFO L93 Difference]: Finished difference Result 2861 states and 4474 transitions. [2020-10-14 09:14:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:14:54,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 09:14:54,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:54,968 INFO L225 Difference]: With dead ends: 2861 [2020-10-14 09:14:54,968 INFO L226 Difference]: Without dead ends: 1835 [2020-10-14 09:14:54,972 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 09:14:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2020-10-14 09:14:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1833. [2020-10-14 09:14:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2020-10-14 09:14:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2840 transitions. [2020-10-14 09:14:55,118 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2840 transitions. Word has length 68 [2020-10-14 09:14:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:55,118 INFO L479 AbstractCegarLoop]: Abstraction has 1833 states and 2840 transitions. [2020-10-14 09:14:55,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:14:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2840 transitions. [2020-10-14 09:14:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 09:14:55,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:55,130 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 09:14:55,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:14:55,131 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:55,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1407566693, now seen corresponding path program 1 times [2020-10-14 09:14:55,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:55,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628868854] [2020-10-14 09:14:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:55,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:55,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:56,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:56,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 09:14:56,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:14:56,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-14 09:14:56,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:56,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:56,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 09:14:56,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:14:56,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 09:14:56,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:56,319 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:14:56,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:56,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:56,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:56,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:56,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:56,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:14:56,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:56,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:56,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:56,359 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 09:14:56,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628868854] [2020-10-14 09:14:56,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:14:56,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 09:14:56,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776916364] [2020-10-14 09:14:56,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 09:14:56,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:56,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 09:14:56,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 09:14:56,362 INFO L87 Difference]: Start difference. First operand 1833 states and 2840 transitions. Second operand 8 states. [2020-10-14 09:14:56,578 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 09:14:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:57,747 INFO L93 Difference]: Finished difference Result 12597 states and 19646 transitions. [2020-10-14 09:14:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:14:57,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-14 09:14:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:57,806 INFO L225 Difference]: With dead ends: 12597 [2020-10-14 09:14:57,806 INFO L226 Difference]: Without dead ends: 10803 [2020-10-14 09:14:57,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:14:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10803 states. [2020-10-14 09:14:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10803 to 3625. [2020-10-14 09:14:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3625 states. [2020-10-14 09:14:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 5576 transitions. [2020-10-14 09:14:58,161 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 5576 transitions. Word has length 69 [2020-10-14 09:14:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:58,162 INFO L479 AbstractCegarLoop]: Abstraction has 3625 states and 5576 transitions. [2020-10-14 09:14:58,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 09:14:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 5576 transitions. [2020-10-14 09:14:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:14:58,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:58,163 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 09:14:58,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:14:58,164 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:58,164 INFO L82 PathProgramCache]: Analyzing trace with hash 666361810, now seen corresponding path program 1 times [2020-10-14 09:14:58,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:58,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605784663] [2020-10-14 09:14:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:58,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:58,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:58,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:58,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:14:58,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:14:58,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-14 09:14:58,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:58,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:14:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-14 09:14:58,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:14:58,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:59,030 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:14:59,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:59,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:59,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:59,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:59,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:59,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-14 09:14:59,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:59,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:59,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:59,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:59,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:59,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:59,141 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 09:14:59,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605784663] [2020-10-14 09:14:59,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:14:59,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:14:59,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299208983] [2020-10-14 09:14:59,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:14:59,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:59,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:14:59,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:14:59,143 INFO L87 Difference]: Start difference. First operand 3625 states and 5576 transitions. Second operand 5 states. [2020-10-14 09:15:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:15:00,318 INFO L93 Difference]: Finished difference Result 7339 states and 11241 transitions. [2020-10-14 09:15:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:15:00,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 09:15:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:15:00,356 INFO L225 Difference]: With dead ends: 7339 [2020-10-14 09:15:00,356 INFO L226 Difference]: Without dead ends: 7337 [2020-10-14 09:15:00,360 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 09:15:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7337 states. [2020-10-14 09:15:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7337 to 3753. [2020-10-14 09:15:00,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3753 states. [2020-10-14 09:15:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 5704 transitions. [2020-10-14 09:15:00,664 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 5704 transitions. Word has length 70 [2020-10-14 09:15:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:15:00,664 INFO L479 AbstractCegarLoop]: Abstraction has 3753 states and 5704 transitions. [2020-10-14 09:15:00,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:15:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 5704 transitions. [2020-10-14 09:15:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 09:15:00,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:15:00,675 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 09:15:00,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:15:00,675 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:15:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:15:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash -808000588, now seen corresponding path program 1 times [2020-10-14 09:15:00,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:15:00,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127815597] [2020-10-14 09:15:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:15:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:00,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:00,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:01,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:01,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 09:15:01,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:15:01,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-14 09:15:01,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:01,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:01,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:15:01,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:15:01,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 09:15:01,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:15:01,516 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:15:01,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:15:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:01,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:01,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:01,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:15:01,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:15:01,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:15:01,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:01,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:01,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:15:01,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:15:01,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:15:01,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:01,545 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 09:15:01,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127815597] [2020-10-14 09:15:01,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:15:01,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:15:01,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525705213] [2020-10-14 09:15:01,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:15:01,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:15:01,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:15:01,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:15:01,548 INFO L87 Difference]: Start difference. First operand 3753 states and 5704 transitions. Second operand 4 states. [2020-10-14 09:15:01,722 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-14 09:15:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:15:02,606 INFO L93 Difference]: Finished difference Result 9359 states and 14252 transitions. [2020-10-14 09:15:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:15:02,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 09:15:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:15:02,640 INFO L225 Difference]: With dead ends: 9359 [2020-10-14 09:15:02,640 INFO L226 Difference]: Without dead ends: 5645 [2020-10-14 09:15:02,659 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 09:15:02,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5645 states. [2020-10-14 09:15:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5645 to 5643. [2020-10-14 09:15:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5643 states. [2020-10-14 09:15:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5643 states to 5643 states and 8554 transitions. [2020-10-14 09:15:03,159 INFO L78 Accepts]: Start accepts. Automaton has 5643 states and 8554 transitions. Word has length 71 [2020-10-14 09:15:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:15:03,159 INFO L479 AbstractCegarLoop]: Abstraction has 5643 states and 8554 transitions. [2020-10-14 09:15:03,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:15:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 5643 states and 8554 transitions. [2020-10-14 09:15:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 09:15:03,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:15:03,165 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] [2020-10-14 09:15:03,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:15:03,166 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:15:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:15:03,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1615243099, now seen corresponding path program 1 times [2020-10-14 09:15:03,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:15:03,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591291403] [2020-10-14 09:15:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:15:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:03,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:03,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:03,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:03,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 09:15:03,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:15:03,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-14 09:15:03,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:03,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:03,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:15:03,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:15:03,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 09:15:03,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:04,133 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:15:04,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:15:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:04,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:04,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:04,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:15:04,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:15:04,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:15:04,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:04,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:15:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:15:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:15:04,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:15:04,192 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 09:15:04,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591291403] [2020-10-14 09:15:04,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:15:04,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:15:04,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69859221] [2020-10-14 09:15:04,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:15:04,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:15:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:15:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:15:04,194 INFO L87 Difference]: Start difference. First operand 5643 states and 8554 transitions. Second operand 5 states. [2020-10-14 09:15:04,461 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-14 09:15:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:15:05,526 INFO L93 Difference]: Finished difference Result 12945 states and 19693 transitions. [2020-10-14 09:15:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:15:05,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2020-10-14 09:15:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:15:05,550 INFO L225 Difference]: With dead ends: 12945 [2020-10-14 09:15:05,550 INFO L226 Difference]: Without dead ends: 9231 [2020-10-14 09:15:05,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:15:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9231 states. [2020-10-14 09:15:06,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9231 to 9227. [2020-10-14 09:15:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9227 states. [2020-10-14 09:15:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9227 states to 9227 states and 13962 transitions. [2020-10-14 09:15:06,261 INFO L78 Accepts]: Start accepts. Automaton has 9227 states and 13962 transitions. Word has length 96 [2020-10-14 09:15:06,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:15:06,262 INFO L479 AbstractCegarLoop]: Abstraction has 9227 states and 13962 transitions. [2020-10-14 09:15:06,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:15:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9227 states and 13962 transitions. [2020-10-14 09:15:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 09:15:06,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:15:06,267 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] [2020-10-14 09:15:06,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:15:06,268 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:15:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:15:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash -993791013, now seen corresponding path program 1 times [2020-10-14 09:15:06,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:15:06,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848568401] [2020-10-14 09:15:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:15:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:06,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:06,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:06,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:06,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:07,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:11,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:11,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 09:15:11,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:15:11,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 09:15:11,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:11,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:11,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:15:11,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 09:15:11,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 09:15:11,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:11,504 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:15:11,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:15:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:11,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:11,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:11,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:15:11,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:15:11,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:15:11,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:11,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:11,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:15:11,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:15:11,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:15:11,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:15:11,558 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 09:15:11,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848568401] [2020-10-14 09:15:11,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:15:11,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:15:11,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016264007] [2020-10-14 09:15:11,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:15:11,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:15:11,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:15:11,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:15:11,562 INFO L87 Difference]: Start difference. First operand 9227 states and 13962 transitions. Second operand 4 states. [2020-10-14 09:15:11,797 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:15:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:15:13,498 INFO L93 Difference]: Finished difference Result 26607 states and 40204 transitions. [2020-10-14 09:15:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:15:13,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-14 09:15:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:15:13,545 INFO L225 Difference]: With dead ends: 26607 [2020-10-14 09:15:13,545 INFO L226 Difference]: Without dead ends: 17421 [2020-10-14 09:15:13,570 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 09:15:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17421 states. [2020-10-14 09:15:14,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17421 to 17419. [2020-10-14 09:15:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17419 states. [2020-10-14 09:15:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17419 states to 17419 states and 26122 transitions. [2020-10-14 09:15:14,690 INFO L78 Accepts]: Start accepts. Automaton has 17419 states and 26122 transitions. Word has length 97 [2020-10-14 09:15:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:15:14,690 INFO L479 AbstractCegarLoop]: Abstraction has 17419 states and 26122 transitions. [2020-10-14 09:15:14,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:15:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 17419 states and 26122 transitions. [2020-10-14 09:15:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 09:15:14,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:15:14,698 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] [2020-10-14 09:15:14,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:15:14,698 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:15:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:15:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1801279003, now seen corresponding path program 1 times [2020-10-14 09:15:14,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:15:14,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000188772] [2020-10-14 09:15:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:15:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:14,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:14,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:14,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:15,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:16,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:19,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:19,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 09:15:19,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:15:19,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4981 [2020-10-14 09:15:19,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:19,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:15:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-14 09:15:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:15:19,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:19,892 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:15:19,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:15:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:19,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:19,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:19,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:15:19,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:15:19,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:15:19,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:19,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:19,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:15:19,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:15:19,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:15:19,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:19,935 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 09:15:19,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000188772] [2020-10-14 09:15:19,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:15:19,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:15:19,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655320005] [2020-10-14 09:15:19,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:15:19,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:15:19,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:15:19,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:15:19,937 INFO L87 Difference]: Start difference. First operand 17419 states and 26122 transitions. Second operand 4 states. [2020-10-14 09:15:20,098 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:15:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:15:22,494 INFO L93 Difference]: Finished difference Result 50415 states and 75404 transitions. [2020-10-14 09:15:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:15:22,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-14 09:15:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:15:22,570 INFO L225 Difference]: With dead ends: 50415 [2020-10-14 09:15:22,570 INFO L226 Difference]: Without dead ends: 33037 [2020-10-14 09:15:22,615 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 09:15:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33037 states. [2020-10-14 09:15:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33037 to 33035. [2020-10-14 09:15:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33035 states. [2020-10-14 09:15:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33035 states to 33035 states and 49002 transitions. [2020-10-14 09:15:24,156 INFO L78 Accepts]: Start accepts. Automaton has 33035 states and 49002 transitions. Word has length 97 [2020-10-14 09:15:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:15:24,156 INFO L479 AbstractCegarLoop]: Abstraction has 33035 states and 49002 transitions. [2020-10-14 09:15:24,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:15:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 33035 states and 49002 transitions. [2020-10-14 09:15:24,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 09:15:24,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:15:24,167 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] [2020-10-14 09:15:24,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:15:24,168 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:15:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:15:24,168 INFO L82 PathProgramCache]: Analyzing trace with hash 322828154, now seen corresponding path program 1 times [2020-10-14 09:15:24,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:15:24,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674045416] [2020-10-14 09:15:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:15:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:24,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:24,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:24,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:24,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:25,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:28,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:28,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 09:15:28,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:15:28,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3869 [2020-10-14 09:15:28,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:28,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:28,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:15:28,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-14 09:15:28,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 09:15:28,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:28,223 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:15:28,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:15:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:28,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:28,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:28,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:15:28,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:15:28,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:15:28,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:28,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:28,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:15:28,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:15:28,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:15:28,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:28,247 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 09:15:28,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674045416] [2020-10-14 09:15:28,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:15:28,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:15:28,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952023261] [2020-10-14 09:15:28,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:15:28,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:15:28,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:15:28,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:15:28,249 INFO L87 Difference]: Start difference. First operand 33035 states and 49002 transitions. Second operand 4 states. [2020-10-14 09:15:28,423 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:15:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:15:31,832 INFO L93 Difference]: Finished difference Result 95503 states and 141164 transitions. [2020-10-14 09:15:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:15:31,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-14 09:15:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:15:31,930 INFO L225 Difference]: With dead ends: 95503 [2020-10-14 09:15:31,931 INFO L226 Difference]: Without dead ends: 62509 [2020-10-14 09:15:32,010 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 09:15:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62509 states. [2020-10-14 09:15:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62509 to 62507. [2020-10-14 09:15:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62507 states. [2020-10-14 09:15:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62507 states to 62507 states and 91562 transitions. [2020-10-14 09:15:36,265 INFO L78 Accepts]: Start accepts. Automaton has 62507 states and 91562 transitions. Word has length 97 [2020-10-14 09:15:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:15:36,265 INFO L479 AbstractCegarLoop]: Abstraction has 62507 states and 91562 transitions. [2020-10-14 09:15:36,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:15:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 62507 states and 91562 transitions. [2020-10-14 09:15:36,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 09:15:36,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:15:36,283 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] [2020-10-14 09:15:36,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:15:36,283 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:15:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:15:36,283 INFO L82 PathProgramCache]: Analyzing trace with hash -164007677, now seen corresponding path program 1 times [2020-10-14 09:15:36,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:15:36,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674584851] [2020-10-14 09:15:36,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:15:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:36,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:36,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:36,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:36,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:36,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:40,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:40,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 09:15:40,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:15:40,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4126 [2020-10-14 09:15:40,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:40,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:40,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:15:40,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 09:15:40,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:15:40,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:15:40,720 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:15:40,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:15:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:40,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:40,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:40,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:15:40,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:15:40,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:15:40,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:40,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:40,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:15:40,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:15:40,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:15:40,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:40,745 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 09:15:40,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674584851] [2020-10-14 09:15:40,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:15:40,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:15:40,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660867832] [2020-10-14 09:15:40,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:15:40,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:15:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:15:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:15:40,747 INFO L87 Difference]: Start difference. First operand 62507 states and 91562 transitions. Second operand 4 states. [2020-10-14 09:15:40,916 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:15:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:15:48,007 INFO L93 Difference]: Finished difference Result 180399 states and 263084 transitions. [2020-10-14 09:15:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:15:48,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-14 09:15:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:15:48,215 INFO L225 Difference]: With dead ends: 180399 [2020-10-14 09:15:48,216 INFO L226 Difference]: Without dead ends: 117933 [2020-10-14 09:15:48,307 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 09:15:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117933 states. [2020-10-14 09:15:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117933 to 117931. [2020-10-14 09:15:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117931 states. [2020-10-14 09:15:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117931 states to 117931 states and 170282 transitions. [2020-10-14 09:15:54,088 INFO L78 Accepts]: Start accepts. Automaton has 117931 states and 170282 transitions. Word has length 97 [2020-10-14 09:15:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:15:54,089 INFO L479 AbstractCegarLoop]: Abstraction has 117931 states and 170282 transitions. [2020-10-14 09:15:54,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:15:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 117931 states and 170282 transitions. [2020-10-14 09:15:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 09:15:54,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:15:54,111 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] [2020-10-14 09:15:54,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:15:54,111 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:15:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:15:54,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1599503642, now seen corresponding path program 1 times [2020-10-14 09:15:54,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:15:54,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386611657] [2020-10-14 09:15:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:15:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:54,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:54,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:54,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:54,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:54,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:59,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:59,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 09:15:59,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:15:59,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:15:59,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:59,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:15:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 09:15:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:15:59,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:59,303 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:15:59,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:15:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:59,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:59,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:59,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:15:59,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:15:59,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:15:59,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:59,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:59,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:15:59,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:15:59,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:15:59,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:59,331 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 09:15:59,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386611657] [2020-10-14 09:15:59,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:15:59,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:15:59,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56882429] [2020-10-14 09:15:59,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:15:59,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:15:59,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:15:59,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:15:59,333 INFO L87 Difference]: Start difference. First operand 117931 states and 170282 transitions. Second operand 4 states. [2020-10-14 09:15:59,502 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:16:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:16:09,975 INFO L93 Difference]: Finished difference Result 339631 states and 487724 transitions. [2020-10-14 09:16:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:16:09,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-14 09:16:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:16:10,747 INFO L225 Difference]: With dead ends: 339631 [2020-10-14 09:16:10,748 INFO L226 Difference]: Without dead ends: 221741 [2020-10-14 09:16:10,863 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 09:16:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221741 states. [2020-10-14 09:16:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221741 to 221739. [2020-10-14 09:16:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221739 states. [2020-10-14 09:16:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221739 states to 221739 states and 314922 transitions. [2020-10-14 09:16:24,854 INFO L78 Accepts]: Start accepts. Automaton has 221739 states and 314922 transitions. Word has length 97 [2020-10-14 09:16:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:16:24,855 INFO L479 AbstractCegarLoop]: Abstraction has 221739 states and 314922 transitions. [2020-10-14 09:16:24,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:16:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 221739 states and 314922 transitions. [2020-10-14 09:16:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 09:16:27,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:16:27,780 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 09:16:27,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:16:27,781 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:16:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:16:27,781 INFO L82 PathProgramCache]: Analyzing trace with hash 410995218, now seen corresponding path program 1 times [2020-10-14 09:16:27,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:16:27,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928279833] [2020-10-14 09:16:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:16:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:16:27,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:27,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:27,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:28,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:28,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:29,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:16:29,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 09:16:29,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:16:29,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1901 [2020-10-14 09:16:29,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:16:29,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:16:29,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:16:29,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:16:29,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 09:16:29,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:16:29,891 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:16:29,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:16:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:16:29,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:29,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:16:29,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:16:29,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:16:29,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:16:29,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:16:29,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:16:29,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:16:29,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:16:29,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:16:29,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:16:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:16:29,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928279833] [2020-10-14 09:16:29,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:16:29,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:16:29,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660917526] [2020-10-14 09:16:29,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:16:29,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:16:29,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:16:29,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:16:29,923 INFO L87 Difference]: Start difference. First operand 221739 states and 314922 transitions. Second operand 6 states. [2020-10-14 09:16:30,089 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:17:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:15,652 INFO L93 Difference]: Finished difference Result 1061431 states and 1502256 transitions. [2020-10-14 09:17:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 09:17:15,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-14 09:17:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:16,914 INFO L225 Difference]: With dead ends: 1061431 [2020-10-14 09:17:16,915 INFO L226 Difference]: Without dead ends: 839733 [2020-10-14 09:17:17,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:17:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839733 states.