/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/array-examples/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:22:55,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:22:55,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:22:56,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:22:56,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:22:56,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:22:56,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:22:56,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:22:56,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:22:56,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:22:56,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:22:56,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:22:56,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:22:56,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:22:56,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:22:56,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:22:56,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:22:56,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:22:56,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:22:56,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:22:56,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:22:56,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:22:56,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:22:56,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:22:56,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:22:56,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:22:56,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:22:56,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:22:56,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:22:56,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:22:56,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:22:56,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:22:56,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:22:56,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:22:56,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:22:56,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:22:56,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:22:56,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:22:56,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:22:56,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:22:56,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:22:56,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:22:56,093 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:22:56,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:22:56,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:22:56,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:22:56,099 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:22:56,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:22:56,099 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:22:56,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:22:56,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:22:56,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:22:56,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:22:56,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:22:56,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:22:56,100 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:22:56,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:22:56,101 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:22:56,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:22:56,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:22:56,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:22:56,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:22:56,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:22:56,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:22:56,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:22:56,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:22:56,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:22:56,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:22:56,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:22:56,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:22:56,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:22:56,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:22:56,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:22:56,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:22:56,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:22:56,426 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:22:56,426 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:22:56,427 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2020-10-13 23:22:56,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f88642253/da0984cae40b4f3e917d2263f6705e6d/FLAG7d4e24d07 [2020-10-13 23:22:56,884 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:22:56,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2020-10-13 23:22:56,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f88642253/da0984cae40b4f3e917d2263f6705e6d/FLAG7d4e24d07 [2020-10-13 23:22:57,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f88642253/da0984cae40b4f3e917d2263f6705e6d [2020-10-13 23:22:57,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:22:57,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:22:57,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:57,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:22:57,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:22:57,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:57" (1/1) ... [2020-10-13 23:22:57,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66948a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57, skipping insertion in model container [2020-10-13 23:22:57,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:57" (1/1) ... [2020-10-13 23:22:57,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:22:57,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:22:57,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:57,580 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:22:57,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:57,622 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:22:57,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57 WrapperNode [2020-10-13 23:22:57,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:57,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:22:57,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:22:57,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:22:57,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57" (1/1) ... [2020-10-13 23:22:57,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57" (1/1) ... [2020-10-13 23:22:57,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57" (1/1) ... [2020-10-13 23:22:57,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57" (1/1) ... [2020-10-13 23:22:57,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57" (1/1) ... [2020-10-13 23:22:57,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57" (1/1) ... [2020-10-13 23:22:57,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57" (1/1) ... [2020-10-13 23:22:57,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:22:57,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:22:57,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:22:57,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:22:57,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:22:57,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:22:57,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:22:57,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:22:57,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:22:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:22:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:22:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:22:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:22:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:22:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:22:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:22:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:22:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:22:57,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:22:58,228 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:22:58,228 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:22:58,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:58 BoogieIcfgContainer [2020-10-13 23:22:58,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:22:58,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:22:58,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:22:58,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:22:58,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:22:57" (1/3) ... [2020-10-13 23:22:58,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c451a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:58, skipping insertion in model container [2020-10-13 23:22:58,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:57" (2/3) ... [2020-10-13 23:22:58,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c451a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:58, skipping insertion in model container [2020-10-13 23:22:58,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:58" (3/3) ... [2020-10-13 23:22:58,243 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2020-10-13 23:22:58,255 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:22:58,262 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:22:58,288 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:22:58,316 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:22:58,316 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:22:58,316 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:22:58,316 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:22:58,316 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:22:58,317 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:22:58,317 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:22:58,317 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:22:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-13 23:22:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:22:58,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:58,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:58,361 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:58,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1606204250, now seen corresponding path program 1 times [2020-10-13 23:22:58,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:58,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670065755] [2020-10-13 23:22:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:58,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:58,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:22:58,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:22:58,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-10-13 23:22:58,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:58,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:58,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:58,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:22:58,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:58,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:22:58,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:58,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:58,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:58,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:58,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:22:58,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:58,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:58,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:58,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:58,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:58,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:59,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670065755] [2020-10-13 23:22:59,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:59,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:22:59,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723199319] [2020-10-13 23:22:59,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:22:59,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:22:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:59,040 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-13 23:22:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:59,160 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2020-10-13 23:22:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:22:59,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 23:22:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:59,172 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:22:59,172 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 23:22:59,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 23:22:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 23:22:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:22:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-10-13 23:22:59,217 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2020-10-13 23:22:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:59,218 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-10-13 23:22:59,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:22:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-10-13 23:22:59,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:22:59,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:59,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:59,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:22:59,221 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash -729587696, now seen corresponding path program 1 times [2020-10-13 23:22:59,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:59,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649690264] [2020-10-13 23:22:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:59,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:59,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:22:59,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:22:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-13 23:22:59,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:59,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:22:59,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:22:59,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:22:59,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:59,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:59,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:59,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:59,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:59,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:59,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:59,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:59,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:59,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:59,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649690264] [2020-10-13 23:22:59,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:59,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:22:59,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323657661] [2020-10-13 23:22:59,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:22:59,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:59,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:22:59,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:22:59,610 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2020-10-13 23:22:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:59,704 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-10-13 23:22:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:22:59,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 23:22:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:59,706 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:22:59,706 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:22:59,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:22:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:22:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-13 23:22:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:22:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-13 23:22:59,716 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 17 [2020-10-13 23:22:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:59,716 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-13 23:22:59,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:22:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-13 23:22:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:22:59,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:59,718 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] [2020-10-13 23:22:59,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:22:59,718 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:59,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1226217789, now seen corresponding path program 1 times [2020-10-13 23:22:59,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:59,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683182964] [2020-10-13 23:22:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:59,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:00,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:23:00,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:00,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-13 23:23:00,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:00,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:23:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:23:00,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:23:00,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:00,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:00,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:00,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:00,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:00,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:00,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:00,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:00,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:00,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:00,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:23:00,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683182964] [2020-10-13 23:23:00,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:00,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:23:00,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157757422] [2020-10-13 23:23:00,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:23:00,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:00,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:23:00,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:00,481 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 5 states. [2020-10-13 23:23:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:00,598 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2020-10-13 23:23:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:23:00,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 23:23:00,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:00,600 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:23:00,600 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:23:00,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:23:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-13 23:23:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:23:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-10-13 23:23:00,609 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 22 [2020-10-13 23:23:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:00,609 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-10-13 23:23:00,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:23:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-10-13 23:23:00,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:23:00,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:00,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:00,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:23:00,612 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:00,612 INFO L82 PathProgramCache]: Analyzing trace with hash 182791532, now seen corresponding path program 2 times [2020-10-13 23:23:00,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:00,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666859630] [2020-10-13 23:23:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:00,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:02,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:02,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:23:02,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:02,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1481 [2020-10-13 23:23:02,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:02,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:02,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:02,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:23:02,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:23:02,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:02,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:02,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:02,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:02,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:02,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:02,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:02,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:02,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:02,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:02,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:02,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:02,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:23:02,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666859630] [2020-10-13 23:23:02,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:02,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:23:02,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132013403] [2020-10-13 23:23:02,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:23:02,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:02,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:23:02,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:02,171 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 6 states. [2020-10-13 23:23:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:02,328 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2020-10-13 23:23:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:23:02,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 23:23:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:02,330 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:23:02,331 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:23:02,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:23:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-13 23:23:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:23:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-10-13 23:23:02,339 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 27 [2020-10-13 23:23:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:02,340 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-10-13 23:23:02,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:23:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-10-13 23:23:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:23:02,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:02,341 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:02,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:23:02,342 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash 532900833, now seen corresponding path program 3 times [2020-10-13 23:23:02,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:02,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163604395] [2020-10-13 23:23:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:02,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:02,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:02,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:05,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:23:05,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:05,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2940 [2020-10-13 23:23:05,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:05,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:05,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:23:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:23:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:23:05,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:05,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:05,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:05,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:05,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:05,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:23:05,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:05,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:05,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:05,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:23:05,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163604395] [2020-10-13 23:23:05,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:05,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:23:05,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053487389] [2020-10-13 23:23:05,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:23:05,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:23:05,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:23:05,372 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 7 states. [2020-10-13 23:23:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:05,524 INFO L93 Difference]: Finished difference Result 89 states and 118 transitions. [2020-10-13 23:23:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:23:05,524 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-13 23:23:05,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:05,525 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:23:05,525 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:23:05,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:23:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:23:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-13 23:23:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:23:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-10-13 23:23:05,537 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 32 [2020-10-13 23:23:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:05,539 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-10-13 23:23:05,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:23:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-10-13 23:23:05,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:23:05,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:05,541 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:05,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:23:05,541 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:05,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1879168312, now seen corresponding path program 4 times [2020-10-13 23:23:05,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:05,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47063306] [2020-10-13 23:23:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:05,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:10,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:10,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:23:10,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:10,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:23:10,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:10,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:23:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:23:10,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:23:10,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:10,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:10,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:10,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:10,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:10,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:10,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:10,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:10,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:10,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:10,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:10,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:10,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:23:10,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47063306] [2020-10-13 23:23:10,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:10,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:23:10,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952237866] [2020-10-13 23:23:10,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:23:10,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:23:10,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:10,641 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 8 states. [2020-10-13 23:23:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:10,812 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2020-10-13 23:23:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:23:10,813 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-13 23:23:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:10,814 INFO L225 Difference]: With dead ends: 99 [2020-10-13 23:23:10,815 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:23:10,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:23:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-10-13 23:23:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:23:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-10-13 23:23:10,827 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 37 [2020-10-13 23:23:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:10,827 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-10-13 23:23:10,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:23:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-10-13 23:23:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:23:10,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:10,834 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:10,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:23:10,835 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:10,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1908396411, now seen corresponding path program 5 times [2020-10-13 23:23:10,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:10,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925160225] [2020-10-13 23:23:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:10,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:10,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:15,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:23:15,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:15,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:23:15,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:15,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:15,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:23:15,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:23:15,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:23:15,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:15,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:15,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:15,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:15,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:15,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:15,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:15,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:15,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:23:15,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925160225] [2020-10-13 23:23:15,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:15,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:23:15,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108573953] [2020-10-13 23:23:15,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:23:15,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:15,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:23:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:15,940 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 9 states. [2020-10-13 23:23:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:16,102 INFO L93 Difference]: Finished difference Result 109 states and 146 transitions. [2020-10-13 23:23:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:23:16,102 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-13 23:23:16,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:16,103 INFO L225 Difference]: With dead ends: 109 [2020-10-13 23:23:16,104 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:23:16,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:23:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-13 23:23:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:23:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2020-10-13 23:23:16,119 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 42 [2020-10-13 23:23:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:16,120 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2020-10-13 23:23:16,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:23:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2020-10-13 23:23:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:23:16,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:16,123 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:16,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:23:16,123 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1541400540, now seen corresponding path program 6 times [2020-10-13 23:23:16,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:16,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047169145] [2020-10-13 23:23:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:16,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:16,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:16,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:21,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:21,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:23:21,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:21,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:23:21,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:21,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:21,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:21,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:23:21,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:23:21,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:23:21,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:21,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:21,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:21,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:21,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:21,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:21,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:21,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:21,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:21,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:21,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:21,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:23:21,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047169145] [2020-10-13 23:23:21,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:21,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:21,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221111529] [2020-10-13 23:23:21,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:21,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:21,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:21,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:21,240 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand 10 states. [2020-10-13 23:23:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:21,411 INFO L93 Difference]: Finished difference Result 119 states and 160 transitions. [2020-10-13 23:23:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:23:21,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-13 23:23:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:21,413 INFO L225 Difference]: With dead ends: 119 [2020-10-13 23:23:21,413 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:23:21,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:23:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-10-13 23:23:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:23:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-10-13 23:23:21,421 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 47 [2020-10-13 23:23:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:21,421 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-10-13 23:23:21,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-10-13 23:23:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:23:21,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:21,423 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:21,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:23:21,423 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:21,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1107615447, now seen corresponding path program 7 times [2020-10-13 23:23:21,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:21,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983479142] [2020-10-13 23:23:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:21,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:21,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:22,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:26,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:26,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:23:26,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:26,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:23:26,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:26,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:26,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:23:26,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:23:26,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:23:26,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:26,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:26,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:26,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:26,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:26,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:26,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:26,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:26,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:26,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:26,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:26,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:26,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:23:26,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983479142] [2020-10-13 23:23:26,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:26,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:23:26,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137888891] [2020-10-13 23:23:26,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:23:26,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:26,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:23:26,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:23:26,535 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 11 states. [2020-10-13 23:23:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:26,689 INFO L93 Difference]: Finished difference Result 129 states and 174 transitions. [2020-10-13 23:23:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:23:26,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-13 23:23:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:26,690 INFO L225 Difference]: With dead ends: 129 [2020-10-13 23:23:26,691 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 23:23:26,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:23:26,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 23:23:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-10-13 23:23:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:23:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-10-13 23:23:26,698 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 52 [2020-10-13 23:23:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:26,698 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-10-13 23:23:26,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:23:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-10-13 23:23:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:23:26,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:26,699 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:26,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:23:26,700 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1424181888, now seen corresponding path program 8 times [2020-10-13 23:23:26,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:26,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77749740] [2020-10-13 23:23:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:26,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:26,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:31,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:31,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:23:31,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:31,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:23:31,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:31,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:31,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:23:31,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:23:31,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:23:31,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:31,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:31,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:31,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:31,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:31,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:31,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:31,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:31,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:23:31,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77749740] [2020-10-13 23:23:31,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:31,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:23:31,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551084688] [2020-10-13 23:23:31,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:23:31,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:31,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:23:31,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:23:31,849 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 12 states. [2020-10-13 23:23:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:32,013 INFO L93 Difference]: Finished difference Result 139 states and 188 transitions. [2020-10-13 23:23:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:23:32,014 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-13 23:23:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:32,015 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:23:32,015 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:23:32,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:23:32,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:23:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-13 23:23:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:23:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-10-13 23:23:32,023 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 57 [2020-10-13 23:23:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:32,023 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-10-13 23:23:32,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:23:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-10-13 23:23:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:23:32,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:32,024 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:32,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:23:32,025 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:32,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:32,025 INFO L82 PathProgramCache]: Analyzing trace with hash -958233651, now seen corresponding path program 9 times [2020-10-13 23:23:32,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:32,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543286074] [2020-10-13 23:23:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:32,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:32,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:33,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:37,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:23:37,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:37,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:23:37,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:37,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:37,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:23:37,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:23:37,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:23:37,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:37,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:37,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:37,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:37,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:37,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:37,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:37,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:37,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:23:37,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543286074] [2020-10-13 23:23:37,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:37,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:23:37,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119577185] [2020-10-13 23:23:37,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:23:37,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:37,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:23:37,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:23:37,144 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 13 states. [2020-10-13 23:23:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:37,367 INFO L93 Difference]: Finished difference Result 149 states and 202 transitions. [2020-10-13 23:23:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:23:37,368 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-13 23:23:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:37,369 INFO L225 Difference]: With dead ends: 149 [2020-10-13 23:23:37,369 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:23:37,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:23:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:23:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-10-13 23:23:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:23:37,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2020-10-13 23:23:37,379 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 62 [2020-10-13 23:23:37,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:37,379 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2020-10-13 23:23:37,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:23:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2020-10-13 23:23:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:23:37,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:37,385 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:37,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:23:37,385 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash 138789596, now seen corresponding path program 10 times [2020-10-13 23:23:37,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:37,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098407405] [2020-10-13 23:23:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:37,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:38,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:42,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:42,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:23:42,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:42,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:23:42,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:42,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:23:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:23:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:23:42,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:42,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:42,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:42,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:42,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:42,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:42,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:42,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:42,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:42,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:42,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:42,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:42,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:23:42,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098407405] [2020-10-13 23:23:42,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:42,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:23:42,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274450168] [2020-10-13 23:23:42,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:23:42,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:42,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:23:42,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:23:42,553 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand 14 states. [2020-10-13 23:23:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:42,758 INFO L93 Difference]: Finished difference Result 159 states and 216 transitions. [2020-10-13 23:23:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:23:42,758 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-13 23:23:42,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:42,759 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:23:42,760 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 23:23:42,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:23:42,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 23:23:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-13 23:23:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:23:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2020-10-13 23:23:42,767 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 67 [2020-10-13 23:23:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:42,767 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2020-10-13 23:23:42,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:23:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2020-10-13 23:23:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:23:42,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:42,768 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:42,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:23:42,769 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:42,769 INFO L82 PathProgramCache]: Analyzing trace with hash -748382607, now seen corresponding path program 11 times [2020-10-13 23:23:42,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:42,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657311170] [2020-10-13 23:23:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:42,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:42,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:44,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:47,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:47,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:23:47,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:47,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:23:47,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:47,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:47,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:23:47,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:23:47,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:23:47,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:47,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:47,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:47,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:47,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:47,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:47,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:47,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:47,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:47,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:47,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:47,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:47,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:23:47,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657311170] [2020-10-13 23:23:47,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:47,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:23:47,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139495509] [2020-10-13 23:23:47,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:23:47,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:47,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:23:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:23:47,969 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 15 states. [2020-10-13 23:23:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:48,247 INFO L93 Difference]: Finished difference Result 169 states and 230 transitions. [2020-10-13 23:23:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:23:48,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2020-10-13 23:23:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:48,249 INFO L225 Difference]: With dead ends: 169 [2020-10-13 23:23:48,249 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:23:48,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:23:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:23:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-10-13 23:23:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:23:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2020-10-13 23:23:48,256 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 72 [2020-10-13 23:23:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:48,256 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2020-10-13 23:23:48,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:23:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2020-10-13 23:23:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:23:48,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:48,258 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:48,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:23:48,258 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:48,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:48,258 INFO L82 PathProgramCache]: Analyzing trace with hash -93519816, now seen corresponding path program 12 times [2020-10-13 23:23:48,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:48,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676963585] [2020-10-13 23:23:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:48,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:48,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:50,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:53,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:53,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:23:53,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:53,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:23:53,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:53,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:53,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:23:53,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:23:53,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:23:53,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:53,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:53,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:53,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:53,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:53,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:53,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:53,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:53,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:53,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:53,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:53,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:53,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:23:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 23:23:53,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676963585] [2020-10-13 23:23:53,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:53,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:23:53,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020937011] [2020-10-13 23:23:53,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:23:53,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:53,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:23:53,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:23:53,467 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand 16 states. [2020-10-13 23:23:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:53,728 INFO L93 Difference]: Finished difference Result 179 states and 244 transitions. [2020-10-13 23:23:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:23:53,728 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-13 23:23:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:53,730 INFO L225 Difference]: With dead ends: 179 [2020-10-13 23:23:53,730 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 23:23:53,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:23:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 23:23:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2020-10-13 23:23:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:23:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2020-10-13 23:23:53,741 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 77 [2020-10-13 23:23:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:53,741 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2020-10-13 23:23:53,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:23:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2020-10-13 23:23:53,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:23:53,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:53,742 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:53,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:23:53,743 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1148164373, now seen corresponding path program 13 times [2020-10-13 23:23:53,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:53,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477854540] [2020-10-13 23:23:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:53,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:53,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:54,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:58,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:23:58,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:58,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:23:58,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:58,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:58,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:23:58,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:23:58,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:23:58,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:58,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:58,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:58,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:58,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:58,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:58,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:58,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:58,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:58,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 23:23:58,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477854540] [2020-10-13 23:23:58,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:58,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:23:58,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280658574] [2020-10-13 23:23:58,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:23:58,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:58,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:23:58,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:23:58,944 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand 17 states. [2020-10-13 23:23:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:59,213 INFO L93 Difference]: Finished difference Result 189 states and 258 transitions. [2020-10-13 23:23:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:23:59,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-13 23:23:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:59,215 INFO L225 Difference]: With dead ends: 189 [2020-10-13 23:23:59,215 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 23:23:59,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:23:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 23:23:59,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2020-10-13 23:23:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:23:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 146 transitions. [2020-10-13 23:23:59,221 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 146 transitions. Word has length 82 [2020-10-13 23:23:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:59,222 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 146 transitions. [2020-10-13 23:23:59,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:23:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 146 transitions. [2020-10-13 23:23:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:23:59,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:59,223 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:59,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:23:59,223 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:59,224 INFO L82 PathProgramCache]: Analyzing trace with hash 2011442580, now seen corresponding path program 14 times [2020-10-13 23:23:59,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:59,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506372161] [2020-10-13 23:23:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:59,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:59,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:03,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:04,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:04,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:24:04,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:04,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 23:24:04,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:04,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:04,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:24:04,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:24:04,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:24:04,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:04,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:04,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:04,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:04,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:04,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:04,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:04,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:04,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:04,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 23:24:04,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506372161] [2020-10-13 23:24:04,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:04,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:24:04,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440178991] [2020-10-13 23:24:04,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:24:04,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:04,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:24:04,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:24:04,436 INFO L87 Difference]: Start difference. First operand 112 states and 146 transitions. Second operand 18 states. [2020-10-13 23:24:04,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:04,722 INFO L93 Difference]: Finished difference Result 199 states and 272 transitions. [2020-10-13 23:24:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:24:04,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-10-13 23:24:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:04,725 INFO L225 Difference]: With dead ends: 199 [2020-10-13 23:24:04,725 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 23:24:04,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:24:04,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 23:24:04,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2020-10-13 23:24:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:24:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2020-10-13 23:24:04,730 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 87 [2020-10-13 23:24:04,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:04,731 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2020-10-13 23:24:04,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:24:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2020-10-13 23:24:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:24:04,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:04,732 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:04,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:24:04,732 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:04,732 INFO L82 PathProgramCache]: Analyzing trace with hash -713962567, now seen corresponding path program 15 times [2020-10-13 23:24:04,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:04,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775394886] [2020-10-13 23:24:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:04,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:09,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:09,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:24:09,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:09,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 23:24:09,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:09,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:24:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:24:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:24:09,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:09,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:09,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:09,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:09,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:09,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:09,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:09,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:09,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:09,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 23:24:09,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775394886] [2020-10-13 23:24:09,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:09,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:24:09,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436966988] [2020-10-13 23:24:09,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:24:09,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:09,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:24:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:24:09,959 INFO L87 Difference]: Start difference. First operand 118 states and 154 transitions. Second operand 19 states. [2020-10-13 23:24:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:10,228 INFO L93 Difference]: Finished difference Result 209 states and 286 transitions. [2020-10-13 23:24:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:24:10,229 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 92 [2020-10-13 23:24:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:10,230 INFO L225 Difference]: With dead ends: 209 [2020-10-13 23:24:10,230 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:24:10,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:24:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:24:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2020-10-13 23:24:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:24:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2020-10-13 23:24:10,239 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 92 [2020-10-13 23:24:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:10,239 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2020-10-13 23:24:10,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:24:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2020-10-13 23:24:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 23:24:10,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:10,240 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:10,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:24:10,241 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash 175966960, now seen corresponding path program 16 times [2020-10-13 23:24:10,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:10,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99248632] [2020-10-13 23:24:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:10,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:10,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:11,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:15,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:15,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:24:15,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:15,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:24:15,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:15,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:15,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:24:15,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:24:15,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:24:15,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:15,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:15,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:15,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:15,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:15,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:15,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:15,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 23:24:15,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99248632] [2020-10-13 23:24:15,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:15,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:24:15,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666552293] [2020-10-13 23:24:15,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:24:15,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:15,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:24:15,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:24:15,495 INFO L87 Difference]: Start difference. First operand 124 states and 162 transitions. Second operand 20 states. [2020-10-13 23:24:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:15,807 INFO L93 Difference]: Finished difference Result 219 states and 300 transitions. [2020-10-13 23:24:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:24:15,808 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-10-13 23:24:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:15,809 INFO L225 Difference]: With dead ends: 219 [2020-10-13 23:24:15,809 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 23:24:15,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:24:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 23:24:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2020-10-13 23:24:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:24:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 170 transitions. [2020-10-13 23:24:15,820 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 170 transitions. Word has length 97 [2020-10-13 23:24:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:15,822 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 170 transitions. [2020-10-13 23:24:15,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:24:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 170 transitions. [2020-10-13 23:24:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 23:24:15,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:15,823 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:15,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:24:15,824 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:15,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1067880867, now seen corresponding path program 17 times [2020-10-13 23:24:15,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:15,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144336685] [2020-10-13 23:24:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:15,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:20,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:20,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 23:24:20,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:20,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:24:20,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:20,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:20,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:24:20,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:24:20,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 23:24:20,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:21,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:21,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:21,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:21,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:21,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:21,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:21,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:21,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:21,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:21,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:21,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:21,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 23:24:21,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144336685] [2020-10-13 23:24:21,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:21,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:24:21,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055846225] [2020-10-13 23:24:21,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:24:21,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:24:21,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:24:21,076 INFO L87 Difference]: Start difference. First operand 130 states and 170 transitions. Second operand 21 states. [2020-10-13 23:24:21,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:21,429 INFO L93 Difference]: Finished difference Result 229 states and 314 transitions. [2020-10-13 23:24:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:24:21,430 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 102 [2020-10-13 23:24:21,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:21,431 INFO L225 Difference]: With dead ends: 229 [2020-10-13 23:24:21,431 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 23:24:21,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:24:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 23:24:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2020-10-13 23:24:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:24:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 178 transitions. [2020-10-13 23:24:21,438 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 178 transitions. Word has length 102 [2020-10-13 23:24:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:21,438 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 178 transitions. [2020-10-13 23:24:21,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:24:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 178 transitions. [2020-10-13 23:24:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:24:21,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:21,439 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:21,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:24:21,440 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1417062324, now seen corresponding path program 18 times [2020-10-13 23:24:21,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:21,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346011004] [2020-10-13 23:24:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:21,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:21,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:26,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:26,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:24:26,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:26,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:24:26,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:26,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:26,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:24:26,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:24:26,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:24:26,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:26,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:26,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:26,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:26,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:26,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:26,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:26,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:26,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:26,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:26,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:26,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 23:24:26,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346011004] [2020-10-13 23:24:26,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:26,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:24:26,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176789392] [2020-10-13 23:24:26,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:24:26,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:24:26,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:24:26,711 INFO L87 Difference]: Start difference. First operand 136 states and 178 transitions. Second operand 22 states. [2020-10-13 23:24:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:27,043 INFO L93 Difference]: Finished difference Result 239 states and 328 transitions. [2020-10-13 23:24:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:24:27,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-10-13 23:24:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:27,045 INFO L225 Difference]: With dead ends: 239 [2020-10-13 23:24:27,045 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:24:27,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:24:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:24:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2020-10-13 23:24:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:24:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2020-10-13 23:24:27,060 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 107 [2020-10-13 23:24:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:27,062 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2020-10-13 23:24:27,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:24:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2020-10-13 23:24:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 23:24:27,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:27,064 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:27,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:24:27,065 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -510344959, now seen corresponding path program 19 times [2020-10-13 23:24:27,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:27,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771919803] [2020-10-13 23:24:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:27,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:27,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:28,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:32,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 23:24:32,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:32,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 23:24:32,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:32,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:32,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:24:32,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:24:32,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:24:32,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:32,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:32,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:32,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:32,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:32,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:32,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:32,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:32,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:32,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:32,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:32,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 23:24:32,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771919803] [2020-10-13 23:24:32,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:32,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:24:32,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215885201] [2020-10-13 23:24:32,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:24:32,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:32,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:24:32,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:24:32,395 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand 23 states. [2020-10-13 23:24:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:32,688 INFO L93 Difference]: Finished difference Result 249 states and 342 transitions. [2020-10-13 23:24:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:24:32,688 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-10-13 23:24:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:32,690 INFO L225 Difference]: With dead ends: 249 [2020-10-13 23:24:32,690 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 23:24:32,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:24:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 23:24:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2020-10-13 23:24:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 23:24:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2020-10-13 23:24:32,697 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 112 [2020-10-13 23:24:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:32,697 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2020-10-13 23:24:32,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:24:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2020-10-13 23:24:32,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:24:32,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:32,699 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:32,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:24:32,699 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:32,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1613048408, now seen corresponding path program 20 times [2020-10-13 23:24:32,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:32,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121585061] [2020-10-13 23:24:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:32,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:33,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:33,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:37,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:37,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:24:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:37,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:37,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:37,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:37,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:37,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:37,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:37,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:37,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:37,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:37,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:37,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:37,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 23:24:38,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121585061] [2020-10-13 23:24:38,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:38,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:24:38,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122408550] [2020-10-13 23:24:38,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:24:38,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:24:38,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:24:38,002 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand 24 states. [2020-10-13 23:24:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:38,335 INFO L93 Difference]: Finished difference Result 259 states and 356 transitions. [2020-10-13 23:24:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:24:38,337 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2020-10-13 23:24:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:38,338 INFO L225 Difference]: With dead ends: 259 [2020-10-13 23:24:38,338 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 23:24:38,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:24:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 23:24:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2020-10-13 23:24:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 23:24:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 202 transitions. [2020-10-13 23:24:38,346 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 202 transitions. Word has length 117 [2020-10-13 23:24:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:38,346 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 202 transitions. [2020-10-13 23:24:38,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:24:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 202 transitions. [2020-10-13 23:24:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 23:24:38,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:38,348 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:38,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:24:38,348 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:38,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:38,348 INFO L82 PathProgramCache]: Analyzing trace with hash -602799195, now seen corresponding path program 21 times [2020-10-13 23:24:38,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:38,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271573000] [2020-10-13 23:24:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:38,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:38,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:43,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:43,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 23:24:43,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:24:43,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:24:43,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:43,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:24:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 23:24:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:24:43,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:43,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:43,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:43,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:43,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:43,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:24:43,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:43,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 23:24:43,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271573000] [2020-10-13 23:24:43,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:43,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:24:43,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269865155] [2020-10-13 23:24:43,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:24:43,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:43,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:24:43,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:24:43,703 INFO L87 Difference]: Start difference. First operand 154 states and 202 transitions. Second operand 25 states. [2020-10-13 23:24:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:44,020 INFO L93 Difference]: Finished difference Result 269 states and 370 transitions. [2020-10-13 23:24:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:24:44,021 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 122 [2020-10-13 23:24:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:44,023 INFO L225 Difference]: With dead ends: 269 [2020-10-13 23:24:44,023 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 23:24:44,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:24:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 23:24:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2020-10-13 23:24:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 23:24:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 210 transitions. [2020-10-13 23:24:44,031 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 210 transitions. Word has length 122 [2020-10-13 23:24:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:44,031 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 210 transitions. [2020-10-13 23:24:44,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:24:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 210 transitions. [2020-10-13 23:24:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 23:24:44,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:44,033 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:44,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:24:44,033 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:44,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1405305604, now seen corresponding path program 22 times [2020-10-13 23:24:44,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:44,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394335245] [2020-10-13 23:24:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:44,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:44,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:49,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:49,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 23:24:49,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:24:49,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 23:24:49,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:49,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:49,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:24:49,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:24:49,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:24:49,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:49,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:49,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:49,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:49,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:49,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:49,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:49,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:49,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:49,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:49,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:49,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:49,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 23:24:49,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394335245] [2020-10-13 23:24:49,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:49,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:24:49,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666012395] [2020-10-13 23:24:49,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:24:49,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:49,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:24:49,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:24:49,443 INFO L87 Difference]: Start difference. First operand 160 states and 210 transitions. Second operand 26 states. [2020-10-13 23:24:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:49,835 INFO L93 Difference]: Finished difference Result 279 states and 384 transitions. [2020-10-13 23:24:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:24:49,836 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-10-13 23:24:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:49,838 INFO L225 Difference]: With dead ends: 279 [2020-10-13 23:24:49,838 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 23:24:49,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:24:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 23:24:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2020-10-13 23:24:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 23:24:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 218 transitions. [2020-10-13 23:24:49,846 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 218 transitions. Word has length 127 [2020-10-13 23:24:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:49,846 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 218 transitions. [2020-10-13 23:24:49,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:24:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 218 transitions. [2020-10-13 23:24:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 23:24:49,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:49,848 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:49,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:24:49,848 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1027569225, now seen corresponding path program 23 times [2020-10-13 23:24:49,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:49,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986411347] [2020-10-13 23:24:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:49,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:50,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:51,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:54,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:54,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 23:24:54,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:54,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:24:54,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:54,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:54,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:24:54,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:24:54,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 23:24:54,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:55,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:55,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:55,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:55,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:55,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:55,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:55,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:55,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:55,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:55,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 23:24:55,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986411347] [2020-10-13 23:24:55,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:55,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:24:55,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142760843] [2020-10-13 23:24:55,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:24:55,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:55,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:24:55,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:24:55,229 INFO L87 Difference]: Start difference. First operand 166 states and 218 transitions. Second operand 27 states. [2020-10-13 23:24:55,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:55,650 INFO L93 Difference]: Finished difference Result 289 states and 398 transitions. [2020-10-13 23:24:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:24:55,650 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2020-10-13 23:24:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:55,652 INFO L225 Difference]: With dead ends: 289 [2020-10-13 23:24:55,652 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 23:24:55,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:24:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 23:24:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2020-10-13 23:24:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 23:24:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 226 transitions. [2020-10-13 23:24:55,661 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 226 transitions. Word has length 132 [2020-10-13 23:24:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:55,661 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 226 transitions. [2020-10-13 23:24:55,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:24:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 226 transitions. [2020-10-13 23:24:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:24:55,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:55,663 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:55,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:24:55,663 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash 924082272, now seen corresponding path program 24 times [2020-10-13 23:24:55,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:55,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009991374] [2020-10-13 23:24:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:55,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:56,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:59,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:00,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:00,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:25:00,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:25:00,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:25:00,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:00,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:25:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 23:25:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 23:25:00,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:01,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:01,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:01,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:01,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:01,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:01,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:25:01,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:01,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:01,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:01,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 23:25:01,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009991374] [2020-10-13 23:25:01,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:01,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:25:01,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057320593] [2020-10-13 23:25:01,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:25:01,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:01,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:25:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:25:01,088 INFO L87 Difference]: Start difference. First operand 172 states and 226 transitions. Second operand 28 states. [2020-10-13 23:25:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:01,511 INFO L93 Difference]: Finished difference Result 299 states and 412 transitions. [2020-10-13 23:25:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:25:01,511 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2020-10-13 23:25:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:01,513 INFO L225 Difference]: With dead ends: 299 [2020-10-13 23:25:01,513 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 23:25:01,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:25:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 23:25:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2020-10-13 23:25:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 23:25:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 234 transitions. [2020-10-13 23:25:01,520 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 234 transitions. Word has length 137 [2020-10-13 23:25:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:01,520 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 234 transitions. [2020-10-13 23:25:01,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:25:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 234 transitions. [2020-10-13 23:25:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 23:25:01,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:01,522 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:01,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:25:01,522 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:01,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1593091859, now seen corresponding path program 25 times [2020-10-13 23:25:01,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:01,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219475866] [2020-10-13 23:25:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:01,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:05,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:06,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 23:25:06,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:25:06,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:25:06,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:06,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:06,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:25:06,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 23:25:06,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:25:06,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:06,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:06,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:06,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:06,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:06,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:06,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:06,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:06,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:06,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:06,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:06,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 23:25:06,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219475866] [2020-10-13 23:25:06,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:06,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:25:07,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047298435] [2020-10-13 23:25:07,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:25:07,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:25:07,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:25:07,003 INFO L87 Difference]: Start difference. First operand 178 states and 234 transitions. Second operand 29 states. [2020-10-13 23:25:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:07,392 INFO L93 Difference]: Finished difference Result 309 states and 426 transitions. [2020-10-13 23:25:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:25:07,393 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2020-10-13 23:25:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:07,395 INFO L225 Difference]: With dead ends: 309 [2020-10-13 23:25:07,395 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 23:25:07,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:25:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 23:25:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2020-10-13 23:25:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 23:25:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 242 transitions. [2020-10-13 23:25:07,403 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 242 transitions. Word has length 142 [2020-10-13 23:25:07,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:07,403 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 242 transitions. [2020-10-13 23:25:07,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:25:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 242 transitions. [2020-10-13 23:25:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 23:25:07,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:07,405 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:07,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:25:07,405 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1725960772, now seen corresponding path program 26 times [2020-10-13 23:25:07,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:07,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988235967] [2020-10-13 23:25:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:07,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:08,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:10,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:12,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 23:25:12,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:25:12,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:25:12,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:12,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:12,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:25:12,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 23:25:12,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:25:12,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:12,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:12,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:12,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:12,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:12,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:12,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:12,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:12,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:12,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:12,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:12,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 23:25:12,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988235967] [2020-10-13 23:25:12,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:12,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:25:12,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550506870] [2020-10-13 23:25:12,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:25:12,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:12,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:25:12,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:25:12,893 INFO L87 Difference]: Start difference. First operand 184 states and 242 transitions. Second operand 30 states. [2020-10-13 23:25:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:13,406 INFO L93 Difference]: Finished difference Result 319 states and 440 transitions. [2020-10-13 23:25:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:25:13,407 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-10-13 23:25:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:13,408 INFO L225 Difference]: With dead ends: 319 [2020-10-13 23:25:13,409 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 23:25:13,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:25:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 23:25:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2020-10-13 23:25:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 23:25:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 250 transitions. [2020-10-13 23:25:13,417 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 250 transitions. Word has length 147 [2020-10-13 23:25:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:13,417 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 250 transitions. [2020-10-13 23:25:13,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:25:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 250 transitions. [2020-10-13 23:25:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 23:25:13,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:13,419 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:13,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:25:13,419 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:13,419 INFO L82 PathProgramCache]: Analyzing trace with hash -706483311, now seen corresponding path program 27 times [2020-10-13 23:25:13,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:13,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116646225] [2020-10-13 23:25:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:13,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:13,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:18,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:18,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 23:25:18,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:25:18,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-13 23:25:18,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:18,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:25:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 23:25:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 23:25:18,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:19,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:19,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:19,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:19,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:19,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:19,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:19,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:19,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:19,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:19,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:19,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:19,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 23:25:19,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116646225] [2020-10-13 23:25:19,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:19,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:25:19,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475237232] [2020-10-13 23:25:19,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:25:19,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:19,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:25:19,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:25:19,162 INFO L87 Difference]: Start difference. First operand 190 states and 250 transitions. Second operand 31 states. [2020-10-13 23:25:19,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:19,739 INFO L93 Difference]: Finished difference Result 329 states and 454 transitions. [2020-10-13 23:25:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:25:19,739 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2020-10-13 23:25:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:19,741 INFO L225 Difference]: With dead ends: 329 [2020-10-13 23:25:19,741 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 23:25:19,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:25:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 23:25:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2020-10-13 23:25:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 23:25:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 258 transitions. [2020-10-13 23:25:19,761 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 258 transitions. Word has length 152 [2020-10-13 23:25:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:19,762 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 258 transitions. [2020-10-13 23:25:19,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:25:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 258 transitions. [2020-10-13 23:25:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 23:25:19,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:19,764 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:19,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:25:19,765 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:19,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:19,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2068337896, now seen corresponding path program 28 times [2020-10-13 23:25:19,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:19,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533338552] [2020-10-13 23:25:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:19,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:21,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:23,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:24,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:24,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 23:25:24,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:25:24,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:25:24,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:24,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:24,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:25:24,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 23:25:24,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 23:25:24,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:25,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:25,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:25,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:25,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:25,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:25,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:25,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:25,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:25,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:25,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:25,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:25,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 23:25:25,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533338552] [2020-10-13 23:25:25,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:25,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:25:25,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808877443] [2020-10-13 23:25:25,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:25:25,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:25,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:25:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:25:25,524 INFO L87 Difference]: Start difference. First operand 196 states and 258 transitions. Second operand 32 states. [2020-10-13 23:25:26,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:26,035 INFO L93 Difference]: Finished difference Result 339 states and 468 transitions. [2020-10-13 23:25:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:25:26,035 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 157 [2020-10-13 23:25:26,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:26,037 INFO L225 Difference]: With dead ends: 339 [2020-10-13 23:25:26,037 INFO L226 Difference]: Without dead ends: 206 [2020-10-13 23:25:26,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:25:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-13 23:25:26,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 202. [2020-10-13 23:25:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 23:25:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2020-10-13 23:25:26,045 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 157 [2020-10-13 23:25:26,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:26,045 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2020-10-13 23:25:26,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:25:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2020-10-13 23:25:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 23:25:26,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:26,047 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:26,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:25:26,047 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:26,047 INFO L82 PathProgramCache]: Analyzing trace with hash 12021301, now seen corresponding path program 29 times [2020-10-13 23:25:26,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:26,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717537870] [2020-10-13 23:25:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:26,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:28,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:31,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 23:25:31,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:25:31,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-13 23:25:31,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:31,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:31,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:25:31,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 23:25:31,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 23:25:31,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:31,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:31,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:31,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:31,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:31,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:31,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:31,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:31,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 23:25:31,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717537870] [2020-10-13 23:25:31,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:31,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:25:31,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398247665] [2020-10-13 23:25:31,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:25:31,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:31,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:25:31,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:25:31,723 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand 33 states. [2020-10-13 23:25:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:32,272 INFO L93 Difference]: Finished difference Result 349 states and 482 transitions. [2020-10-13 23:25:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:25:32,273 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 162 [2020-10-13 23:25:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:32,274 INFO L225 Difference]: With dead ends: 349 [2020-10-13 23:25:32,274 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 23:25:32,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:25:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 23:25:32,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 208. [2020-10-13 23:25:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-13 23:25:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 274 transitions. [2020-10-13 23:25:32,283 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 274 transitions. Word has length 162 [2020-10-13 23:25:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:32,284 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 274 transitions. [2020-10-13 23:25:32,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:25:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 274 transitions. [2020-10-13 23:25:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 23:25:32,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:32,285 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:32,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:25:32,286 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1674749836, now seen corresponding path program 30 times [2020-10-13 23:25:32,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:32,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860473500] [2020-10-13 23:25:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:32,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:34,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:37,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:37,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:37,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 23:25:37,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:25:37,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5602 [2020-10-13 23:25:37,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:37,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:37,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:25:37,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 23:25:37,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 23:25:37,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:38,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:38,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:38,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:38,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:38,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:38,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:38,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:38,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:38,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 23:25:38,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860473500] [2020-10-13 23:25:38,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:38,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:25:38,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081246490] [2020-10-13 23:25:38,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:25:38,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:38,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:25:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:25:38,502 INFO L87 Difference]: Start difference. First operand 208 states and 274 transitions. Second operand 34 states. [2020-10-13 23:25:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:39,180 INFO L93 Difference]: Finished difference Result 359 states and 496 transitions. [2020-10-13 23:25:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:25:39,181 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-10-13 23:25:39,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:39,184 INFO L225 Difference]: With dead ends: 359 [2020-10-13 23:25:39,184 INFO L226 Difference]: Without dead ends: 218 [2020-10-13 23:25:39,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:25:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-13 23:25:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2020-10-13 23:25:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 23:25:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 282 transitions. [2020-10-13 23:25:39,202 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 282 transitions. Word has length 167 [2020-10-13 23:25:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:39,203 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 282 transitions. [2020-10-13 23:25:39,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:25:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 282 transitions. [2020-10-13 23:25:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 23:25:39,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:39,205 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:39,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:25:39,205 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:39,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1057742631, now seen corresponding path program 31 times [2020-10-13 23:25:39,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:39,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795474898] [2020-10-13 23:25:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:39,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:42,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:44,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:44,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 23:25:44,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:25:44,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 23:25:44,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:44,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:25:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:25:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 23:25:44,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:44,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:44,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:44,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:44,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:44,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:44,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:44,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:44,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:44,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:44,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:44,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:44,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-13 23:25:44,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795474898] [2020-10-13 23:25:44,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:44,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:25:44,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865718444] [2020-10-13 23:25:44,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:25:44,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:25:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:25:44,927 INFO L87 Difference]: Start difference. First operand 214 states and 282 transitions. Second operand 35 states. [2020-10-13 23:25:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:45,392 INFO L93 Difference]: Finished difference Result 369 states and 510 transitions. [2020-10-13 23:25:45,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:25:45,392 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 172 [2020-10-13 23:25:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:45,394 INFO L225 Difference]: With dead ends: 369 [2020-10-13 23:25:45,394 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 23:25:45,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:25:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 23:25:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2020-10-13 23:25:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-13 23:25:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 290 transitions. [2020-10-13 23:25:45,402 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 290 transitions. Word has length 172 [2020-10-13 23:25:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:45,402 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 290 transitions. [2020-10-13 23:25:45,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:25:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 290 transitions. [2020-10-13 23:25:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 23:25:45,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:45,404 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:45,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:25:45,404 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:45,404 INFO L82 PathProgramCache]: Analyzing trace with hash -179128880, now seen corresponding path program 32 times [2020-10-13 23:25:45,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:45,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044443109] [2020-10-13 23:25:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:45,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:45,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:50,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:50,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 23:25:50,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:25:50,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:25:50,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:50,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:50,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:25:50,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 23:25:50,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 23:25:50,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:51,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:51,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:51,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:51,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:51,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:51,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:51,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:51,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:51,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 23:25:51,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044443109] [2020-10-13 23:25:51,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:51,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:25:51,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671393784] [2020-10-13 23:25:51,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:25:51,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:25:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:25:51,101 INFO L87 Difference]: Start difference. First operand 220 states and 290 transitions. Second operand 36 states. [2020-10-13 23:25:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:51,667 INFO L93 Difference]: Finished difference Result 379 states and 524 transitions. [2020-10-13 23:25:51,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:25:51,668 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-10-13 23:25:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:51,670 INFO L225 Difference]: With dead ends: 379 [2020-10-13 23:25:51,670 INFO L226 Difference]: Without dead ends: 230 [2020-10-13 23:25:51,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:25:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-13 23:25:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2020-10-13 23:25:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-13 23:25:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 298 transitions. [2020-10-13 23:25:51,678 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 298 transitions. Word has length 177 [2020-10-13 23:25:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:51,679 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 298 transitions. [2020-10-13 23:25:51,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:25:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 298 transitions. [2020-10-13 23:25:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 23:25:51,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:51,680 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:51,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:25:51,681 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:51,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1418216317, now seen corresponding path program 33 times [2020-10-13 23:25:51,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:51,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388514797] [2020-10-13 23:25:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:51,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:54,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:56,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:56,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 23:25:56,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:25:56,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 23:25:56,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:56,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:25:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:25:56,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:57,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:57,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:57,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:57,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:57,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:57,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:57,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:57,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:57,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:57,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:57,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:57,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-13 23:25:57,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388514797] [2020-10-13 23:25:57,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:57,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:25:57,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698017291] [2020-10-13 23:25:57,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:25:57,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:25:57,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:25:57,423 INFO L87 Difference]: Start difference. First operand 226 states and 298 transitions. Second operand 37 states. [2020-10-13 23:25:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:58,001 INFO L93 Difference]: Finished difference Result 382 states and 526 transitions. [2020-10-13 23:25:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:25:58,001 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 182 [2020-10-13 23:25:58,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:58,003 INFO L225 Difference]: With dead ends: 382 [2020-10-13 23:25:58,003 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 23:25:58,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:25:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 23:25:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2020-10-13 23:25:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-13 23:25:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 300 transitions. [2020-10-13 23:25:58,015 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 300 transitions. Word has length 182 [2020-10-13 23:25:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:58,015 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 300 transitions. [2020-10-13 23:25:58,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:25:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 300 transitions. [2020-10-13 23:25:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-13 23:25:58,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:58,017 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:58,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:25:58,017 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1974379871, now seen corresponding path program 34 times [2020-10-13 23:25:58,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:58,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945697710] [2020-10-13 23:25:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:58,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:01,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:03,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:03,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-13 23:26:03,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:03,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-13 23:26:03,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:03,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:03,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:26:03,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 23:26:03,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-13 23:26:03,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:03,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:03,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:03,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:03,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:03,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:03,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:03,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:03,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:03,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:03,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2773 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-13 23:26:03,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945697710] [2020-10-13 23:26:03,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:03,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:26:03,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668848556] [2020-10-13 23:26:03,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:26:03,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:03,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:26:03,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:26:03,809 INFO L87 Difference]: Start difference. First operand 228 states and 300 transitions. Second operand 37 states. [2020-10-13 23:26:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:04,308 INFO L93 Difference]: Finished difference Result 253 states and 333 transitions. [2020-10-13 23:26:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:26:04,308 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 184 [2020-10-13 23:26:04,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:04,311 INFO L225 Difference]: With dead ends: 253 [2020-10-13 23:26:04,311 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 23:26:04,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:26:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 23:26:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2020-10-13 23:26:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:26:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 306 transitions. [2020-10-13 23:26:04,320 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 306 transitions. Word has length 184 [2020-10-13 23:26:04,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:04,321 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 306 transitions. [2020-10-13 23:26:04,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:26:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 306 transitions. [2020-10-13 23:26:04,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 23:26:04,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:04,323 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:04,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:26:04,323 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash -176585940, now seen corresponding path program 35 times [2020-10-13 23:26:04,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:04,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992678428] [2020-10-13 23:26:04,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:04,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:04,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:09,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:09,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 23:26:09,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:09,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-13 23:26:09,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:09,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:26:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 23:26:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 23:26:09,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:10,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:10,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:10,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:10,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:10,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:10,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:10,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:10,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:10,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-13 23:26:10,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992678428] [2020-10-13 23:26:10,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:10,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:26:10,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902908370] [2020-10-13 23:26:10,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:26:10,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:10,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:26:10,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:26:10,138 INFO L87 Difference]: Start difference. First operand 232 states and 306 transitions. Second operand 38 states. [2020-10-13 23:26:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:10,756 INFO L93 Difference]: Finished difference Result 399 states and 552 transitions. [2020-10-13 23:26:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:26:10,756 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 187 [2020-10-13 23:26:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:10,758 INFO L225 Difference]: With dead ends: 399 [2020-10-13 23:26:10,758 INFO L226 Difference]: Without dead ends: 242 [2020-10-13 23:26:10,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:26:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-13 23:26:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 238. [2020-10-13 23:26:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-13 23:26:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 314 transitions. [2020-10-13 23:26:10,768 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 314 transitions. Word has length 187 [2020-10-13 23:26:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:10,768 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 314 transitions. [2020-10-13 23:26:10,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:26:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 314 transitions. [2020-10-13 23:26:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-13 23:26:10,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:10,770 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:10,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:26:10,770 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:10,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1142811103, now seen corresponding path program 36 times [2020-10-13 23:26:10,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:10,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500465681] [2020-10-13 23:26:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:10,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:10,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:15,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:15,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-13 23:26:15,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:15,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 23:26:15,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:15,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:15,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:26:15,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 23:26:15,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-13 23:26:15,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:16,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:16,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:16,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:16,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:16,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:16,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:16,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:16,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:16,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:16,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:16,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-13 23:26:16,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500465681] [2020-10-13 23:26:16,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:16,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:26:16,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978257768] [2020-10-13 23:26:16,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:26:16,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:26:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:26:16,607 INFO L87 Difference]: Start difference. First operand 238 states and 314 transitions. Second operand 39 states. [2020-10-13 23:26:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:17,282 INFO L93 Difference]: Finished difference Result 409 states and 566 transitions. [2020-10-13 23:26:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:26:17,283 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 192 [2020-10-13 23:26:17,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:17,285 INFO L225 Difference]: With dead ends: 409 [2020-10-13 23:26:17,286 INFO L226 Difference]: Without dead ends: 248 [2020-10-13 23:26:17,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:26:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-13 23:26:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2020-10-13 23:26:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-13 23:26:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 322 transitions. [2020-10-13 23:26:17,294 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 322 transitions. Word has length 192 [2020-10-13 23:26:17,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:17,294 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 322 transitions. [2020-10-13 23:26:17,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:26:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 322 transitions. [2020-10-13 23:26:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 23:26:17,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:17,296 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:17,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:26:17,296 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash 762544264, now seen corresponding path program 37 times [2020-10-13 23:26:17,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:17,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473296000] [2020-10-13 23:26:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:17,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:17,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:22,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:22,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 23:26:22,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:22,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 23:26:22,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:22,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:22,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:26:22,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 23:26:22,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-13 23:26:22,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:23,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:23,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:23,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:23,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:23,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:23,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:23,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:23,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:23,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:23,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:23,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:23,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-13 23:26:23,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473296000] [2020-10-13 23:26:23,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:23,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:26:23,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545074482] [2020-10-13 23:26:23,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:26:23,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:23,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:26:23,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:26:23,180 INFO L87 Difference]: Start difference. First operand 244 states and 322 transitions. Second operand 40 states. [2020-10-13 23:26:23,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:23,843 INFO L93 Difference]: Finished difference Result 419 states and 580 transitions. [2020-10-13 23:26:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:26:23,844 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 197 [2020-10-13 23:26:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:23,846 INFO L225 Difference]: With dead ends: 419 [2020-10-13 23:26:23,846 INFO L226 Difference]: Without dead ends: 254 [2020-10-13 23:26:23,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:26:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-13 23:26:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2020-10-13 23:26:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-13 23:26:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 330 transitions. [2020-10-13 23:26:23,855 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 330 transitions. Word has length 197 [2020-10-13 23:26:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:23,855 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 330 transitions. [2020-10-13 23:26:23,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:26:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 330 transitions. [2020-10-13 23:26:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-13 23:26:23,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:23,857 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:23,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:26:23,857 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:23,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:23,858 INFO L82 PathProgramCache]: Analyzing trace with hash -571483963, now seen corresponding path program 38 times [2020-10-13 23:26:23,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:23,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023552876] [2020-10-13 23:26:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:23,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:28,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:28,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:28,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-13 23:26:28,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:28,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-13 23:26:28,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:28,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:28,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:26:28,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 23:26:28,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 23:26:28,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:29,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:29,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:29,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:29,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:29,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:29,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:29,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:29,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:29,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-13 23:26:29,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023552876] [2020-10-13 23:26:29,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:29,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:26:29,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465983868] [2020-10-13 23:26:29,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:26:29,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:29,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:26:29,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:26:29,819 INFO L87 Difference]: Start difference. First operand 250 states and 330 transitions. Second operand 41 states. [2020-10-13 23:26:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:30,372 INFO L93 Difference]: Finished difference Result 429 states and 594 transitions. [2020-10-13 23:26:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:26:30,372 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 202 [2020-10-13 23:26:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:30,374 INFO L225 Difference]: With dead ends: 429 [2020-10-13 23:26:30,374 INFO L226 Difference]: Without dead ends: 260 [2020-10-13 23:26:30,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:26:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-13 23:26:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2020-10-13 23:26:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-13 23:26:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 338 transitions. [2020-10-13 23:26:30,383 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 338 transitions. Word has length 202 [2020-10-13 23:26:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:30,384 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 338 transitions. [2020-10-13 23:26:30,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:26:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 338 transitions. [2020-10-13 23:26:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 23:26:30,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:30,385 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:30,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:26:30,386 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:30,386 INFO L82 PathProgramCache]: Analyzing trace with hash 898788836, now seen corresponding path program 39 times [2020-10-13 23:26:30,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:30,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311278266] [2020-10-13 23:26:30,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:30,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:35,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:35,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 23:26:35,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:35,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:26:35,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:35,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:35,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:26:35,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:35,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 23:26:35,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:36,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:36,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:36,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:36,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:36,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:36,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:36,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:36,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-10-13 23:26:36,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311278266] [2020-10-13 23:26:36,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:36,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:26:36,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152508361] [2020-10-13 23:26:36,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:26:36,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:36,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:26:36,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:26:36,429 INFO L87 Difference]: Start difference. First operand 256 states and 338 transitions. Second operand 42 states. [2020-10-13 23:26:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:37,120 INFO L93 Difference]: Finished difference Result 432 states and 596 transitions. [2020-10-13 23:26:37,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:26:37,121 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 207 [2020-10-13 23:26:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:37,123 INFO L225 Difference]: With dead ends: 432 [2020-10-13 23:26:37,123 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 23:26:37,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:26:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 23:26:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-10-13 23:26:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 23:26:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 340 transitions. [2020-10-13 23:26:37,131 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 340 transitions. Word has length 207 [2020-10-13 23:26:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:37,131 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 340 transitions. [2020-10-13 23:26:37,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:26:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 340 transitions. [2020-10-13 23:26:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 23:26:37,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:37,133 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:37,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:26:37,133 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2054779326, now seen corresponding path program 40 times [2020-10-13 23:26:37,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:37,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648977983] [2020-10-13 23:26:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:37,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:42,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-13 23:26:42,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:42,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5141 [2020-10-13 23:26:42,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:42,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:42,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:26:42,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 23:26:42,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-13 23:26:42,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:43,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:43,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:43,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:43,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:43,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:43,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:43,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:43,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:43,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:43,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:43,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:43,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3668 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-13 23:26:43,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648977983] [2020-10-13 23:26:43,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:43,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:26:43,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701187918] [2020-10-13 23:26:43,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:26:43,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:43,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:26:43,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:26:43,196 INFO L87 Difference]: Start difference. First operand 258 states and 340 transitions. Second operand 42 states. [2020-10-13 23:26:43,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:43,901 INFO L93 Difference]: Finished difference Result 283 states and 373 transitions. [2020-10-13 23:26:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:26:43,902 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 209 [2020-10-13 23:26:43,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:43,905 INFO L225 Difference]: With dead ends: 283 [2020-10-13 23:26:43,905 INFO L226 Difference]: Without dead ends: 266 [2020-10-13 23:26:43,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:26:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-13 23:26:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2020-10-13 23:26:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 23:26:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 346 transitions. [2020-10-13 23:26:43,912 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 346 transitions. Word has length 209 [2020-10-13 23:26:43,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:43,913 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 346 transitions. [2020-10-13 23:26:43,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:26:43,913 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 346 transitions. [2020-10-13 23:26:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-13 23:26:43,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:43,915 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:43,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:26:43,915 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:43,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1407202455, now seen corresponding path program 41 times [2020-10-13 23:26:43,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:43,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779438543] [2020-10-13 23:26:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:43,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:48,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-13 23:26:48,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:48,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 23:26:48,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:48,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:26:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:26:48,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:49,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:49,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:49,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:49,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:49,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:49,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:49,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:49,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:49,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-10-13 23:26:49,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779438543] [2020-10-13 23:26:49,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:49,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:26:49,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722796830] [2020-10-13 23:26:49,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:26:49,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:49,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:26:49,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:26:49,887 INFO L87 Difference]: Start difference. First operand 262 states and 346 transitions. Second operand 43 states. [2020-10-13 23:26:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:50,451 INFO L93 Difference]: Finished difference Result 442 states and 610 transitions. [2020-10-13 23:26:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:26:50,451 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 212 [2020-10-13 23:26:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:50,454 INFO L225 Difference]: With dead ends: 442 [2020-10-13 23:26:50,454 INFO L226 Difference]: Without dead ends: 265 [2020-10-13 23:26:50,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:26:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-13 23:26:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2020-10-13 23:26:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-13 23:26:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 348 transitions. [2020-10-13 23:26:50,463 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 348 transitions. Word has length 212 [2020-10-13 23:26:50,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:50,464 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 348 transitions. [2020-10-13 23:26:50,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:26:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 348 transitions. [2020-10-13 23:26:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-13 23:26:50,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:50,465 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:50,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:26:50,466 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:50,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1881617867, now seen corresponding path program 42 times [2020-10-13 23:26:50,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:50,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126313873] [2020-10-13 23:26:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:50,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:50,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:55,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:55,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-13 23:26:55,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:55,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-13 23:26:55,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:55,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:26:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-13 23:26:55,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-13 23:26:55,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:56,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:56,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:56,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:56,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:56,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:56,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:56,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:56,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:56,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:56,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:56,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:56,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3862 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-13 23:26:56,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126313873] [2020-10-13 23:26:56,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:56,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:26:56,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245686291] [2020-10-13 23:26:56,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:26:56,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:56,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:26:56,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:26:56,535 INFO L87 Difference]: Start difference. First operand 264 states and 348 transitions. Second operand 43 states. [2020-10-13 23:26:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:57,144 INFO L93 Difference]: Finished difference Result 289 states and 381 transitions. [2020-10-13 23:26:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:26:57,145 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 214 [2020-10-13 23:26:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:57,148 INFO L225 Difference]: With dead ends: 289 [2020-10-13 23:26:57,148 INFO L226 Difference]: Without dead ends: 272 [2020-10-13 23:26:57,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:26:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-13 23:26:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 268. [2020-10-13 23:26:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 23:26:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 354 transitions. [2020-10-13 23:26:57,156 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 354 transitions. Word has length 214 [2020-10-13 23:26:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:57,157 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 354 transitions. [2020-10-13 23:26:57,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:26:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 354 transitions. [2020-10-13 23:26:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-13 23:26:57,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:57,158 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:57,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:26:57,159 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:57,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1985475776, now seen corresponding path program 43 times [2020-10-13 23:26:57,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:57,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774441102] [2020-10-13 23:26:57,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:57,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking...