/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=NARROWEST --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-industry-pattern/array_ptr_single_elem_init-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:15:12,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:15:12,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:15:12,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:15:12,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:15:12,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:15:12,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:15:12,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:15:12,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:15:12,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:15:12,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:15:12,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:15:12,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:15:12,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:15:12,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:15:12,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:15:12,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:15:12,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:15:12,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:15:12,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:15:12,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:15:12,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:15:12,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:15:12,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:15:12,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:15:12,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:15:12,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:15:12,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:15:12,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:15:12,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:15:12,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:15:12,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:15:12,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:15:12,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:15:12,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:15:12,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:15:12,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:15:12,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:15:12,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:15:12,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:15:12,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:15:12,196 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 05:15:12,239 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:15:12,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:15:12,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:15:12,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:15:12,243 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:15:12,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:15:12,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:15:12,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:15:12,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:15:12,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:15:12,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:15:12,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:15:12,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:15:12,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:15:12,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:15:12,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:15:12,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:15:12,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:15:12,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:15:12,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:15:12,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:15:12,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:15:12,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:15:12,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:15:12,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:15:12,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:15:12,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:15:12,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:15:12,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:15:12,249 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:15:12,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:15:12,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:15:12,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:15:12,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:15:12,562 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:15:12,562 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i [2020-10-13 05:15:12,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5cfcd50d/d031f4a0e3a7432e8617d85cc9dffff8/FLAG664b5d5cd [2020-10-13 05:15:13,098 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:15:13,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i [2020-10-13 05:15:13,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5cfcd50d/d031f4a0e3a7432e8617d85cc9dffff8/FLAG664b5d5cd [2020-10-13 05:15:13,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5cfcd50d/d031f4a0e3a7432e8617d85cc9dffff8 [2020-10-13 05:15:13,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:15:13,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:15:13,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:15:13,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:15:13,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:15:13,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:15:13" (1/1) ... [2020-10-13 05:15:13,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70eb1efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13, skipping insertion in model container [2020-10-13 05:15:13,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:15:13" (1/1) ... [2020-10-13 05:15:13,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:15:13,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:15:13,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:15:13,674 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:15:13,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:15:13,797 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:15:13,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13 WrapperNode [2020-10-13 05:15:13,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:15:13,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:15:13,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:15:13,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:15:13,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13" (1/1) ... [2020-10-13 05:15:13,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13" (1/1) ... [2020-10-13 05:15:13,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13" (1/1) ... [2020-10-13 05:15:13,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13" (1/1) ... [2020-10-13 05:15:13,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13" (1/1) ... [2020-10-13 05:15:13,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13" (1/1) ... [2020-10-13 05:15:13,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13" (1/1) ... [2020-10-13 05:15:13,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:15:13,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:15:13,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:15:13,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:15:13,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13" (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 05:15:13,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:15:13,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:15:13,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:15:13,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:15:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:15:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:15:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:15:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:15:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:15:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:15:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:15:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:15:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 05:15:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 05:15:13,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:15:13,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:15:13,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:15:13,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:15:14,288 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:15:14,289 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:15:14,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:15:14 BoogieIcfgContainer [2020-10-13 05:15:14,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:15:14,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:15:14,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:15:14,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:15:14,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:15:13" (1/3) ... [2020-10-13 05:15:14,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e367c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:15:14, skipping insertion in model container [2020-10-13 05:15:14,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:13" (2/3) ... [2020-10-13 05:15:14,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e367c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:15:14, skipping insertion in model container [2020-10-13 05:15:14,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:15:14" (3/3) ... [2020-10-13 05:15:14,302 INFO L109 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-1.i [2020-10-13 05:15:14,313 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:15:14,320 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:15:14,330 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:15:14,352 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:15:14,353 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:15:14,353 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:15:14,353 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:15:14,353 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:15:14,353 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:15:14,353 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:15:14,354 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:15:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-13 05:15:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 05:15:14,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:14,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:14,379 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash 554320188, now seen corresponding path program 1 times [2020-10-13 05:15:14,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:14,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642345623] [2020-10-13 05:15:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:14,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:14,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:15,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:15,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:15:15,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:15,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-13 05:15:15,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:15,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:15:15,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:15,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:15:15,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 05:15:15,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:15,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:15,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:15,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:15,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:15,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:15:15,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:15,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:15,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:15,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:15,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:15,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642345623] [2020-10-13 05:15:15,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:15:15,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:15:15,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234435183] [2020-10-13 05:15:15,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:15:15,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:15,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:15:15,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:15:15,396 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-10-13 05:15:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:15,626 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2020-10-13 05:15:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:15:15,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 05:15:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:15,641 INFO L225 Difference]: With dead ends: 63 [2020-10-13 05:15:15,641 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:15:15,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:15:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:15:15,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-13 05:15:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 05:15:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-13 05:15:15,725 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2020-10-13 05:15:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:15,725 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-13 05:15:15,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:15:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-13 05:15:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:15:15,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:15,728 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] [2020-10-13 05:15:15,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:15:15,729 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:15,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2023958242, now seen corresponding path program 1 times [2020-10-13 05:15:15,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:15,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626572321] [2020-10-13 05:15:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:15,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:15,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:15,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:16,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:16,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:16,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 05:15:16,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:15:16,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1188 [2020-10-13 05:15:16,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:16,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:15:16,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:15:16,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:15:16,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:17,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:17,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:17,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:17,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:17,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:17,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:15:17,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:17,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:17,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:17,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:17,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:17,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626572321] [2020-10-13 05:15:17,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:15:17,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:15:17,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986070290] [2020-10-13 05:15:17,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:15:17,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:17,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:15:17,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:15:17,067 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-10-13 05:15:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:17,191 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-10-13 05:15:17,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:15:17,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 05:15:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:17,194 INFO L225 Difference]: With dead ends: 61 [2020-10-13 05:15:17,194 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 05:15:17,195 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 05:15:17,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 05:15:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2020-10-13 05:15:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 05:15:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-13 05:15:17,203 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2020-10-13 05:15:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:17,203 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-13 05:15:17,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:15:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-13 05:15:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:15:17,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:17,204 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] [2020-10-13 05:15:17,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:15:17,205 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:17,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1437152228, now seen corresponding path program 1 times [2020-10-13 05:15:17,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:17,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30752393] [2020-10-13 05:15:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:17,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:17,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:17,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:17,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:17,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:17,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:18,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:18,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 05:15:18,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:15:18,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-13 05:15:18,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:18,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:15:18,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:18,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:15:18,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:18,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:18,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:18,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:18,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:18,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:18,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:15:18,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:18,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:18,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:18,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:18,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:18,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30752393] [2020-10-13 05:15:18,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:18,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:15:18,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340683915] [2020-10-13 05:15:18,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:15:18,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:18,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:15:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:15:18,351 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2020-10-13 05:15:18,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:18,579 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-10-13 05:15:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:15:18,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 05:15:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:18,583 INFO L225 Difference]: With dead ends: 67 [2020-10-13 05:15:18,583 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 05:15:18,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:15:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 05:15:18,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2020-10-13 05:15:18,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 05:15:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-10-13 05:15:18,607 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 20 [2020-10-13 05:15:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:18,610 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-10-13 05:15:18,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:15:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-10-13 05:15:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:15:18,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:18,612 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] [2020-10-13 05:15:18,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:15:18,613 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1732225596, now seen corresponding path program 2 times [2020-10-13 05:15:18,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:18,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794168838] [2020-10-13 05:15:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:18,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:18,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:18,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:18,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:18,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:19,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:21,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:21,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:15:21,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 05:15:21,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2863 [2020-10-13 05:15:21,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:21,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:15:21,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:21,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:15:21,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:21,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:21,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:21,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:21,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:21,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:21,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:15:21,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:21,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:21,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:21,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:21,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:21,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794168838] [2020-10-13 05:15:21,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:21,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:15:21,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652025142] [2020-10-13 05:15:21,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:15:21,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:21,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:15:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:15:21,564 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 6 states. [2020-10-13 05:15:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:21,736 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2020-10-13 05:15:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:15:21,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 05:15:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:21,738 INFO L225 Difference]: With dead ends: 80 [2020-10-13 05:15:21,738 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 05:15:21,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:15:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 05:15:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2020-10-13 05:15:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 05:15:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-10-13 05:15:21,747 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 25 [2020-10-13 05:15:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:21,747 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-10-13 05:15:21,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:15:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-10-13 05:15:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:15:21,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:21,749 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] [2020-10-13 05:15:21,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:15:21,750 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash -714249500, now seen corresponding path program 3 times [2020-10-13 05:15:21,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:21,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870347497] [2020-10-13 05:15:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:21,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:21,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:21,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:22,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:22,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:22,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:22,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:22,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:22,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:22,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:22,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:23,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:23,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:23,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:24,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:24,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:24,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:24,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:24,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:24,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:26,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:26,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:26,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 05:15:26,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-13 05:15:26,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:15:26,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:26,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:15:26,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:26,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:15:26,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:26,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:26,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:26,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:26,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:26,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:26,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:15:26,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:26,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:26,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:26,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:26,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:26,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870347497] [2020-10-13 05:15:26,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:26,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:15:26,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253344670] [2020-10-13 05:15:26,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:15:26,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:26,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:15:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:15:26,843 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states. [2020-10-13 05:15:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:27,041 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2020-10-13 05:15:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:15:27,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 05:15:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:27,044 INFO L225 Difference]: With dead ends: 93 [2020-10-13 05:15:27,044 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 05:15:27,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:15:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 05:15:27,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2020-10-13 05:15:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 05:15:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2020-10-13 05:15:27,065 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 30 [2020-10-13 05:15:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:27,065 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2020-10-13 05:15:27,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:15:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2020-10-13 05:15:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:15:27,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:27,067 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] [2020-10-13 05:15:27,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:15:27,067 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:27,068 INFO L82 PathProgramCache]: Analyzing trace with hash -58338500, now seen corresponding path program 4 times [2020-10-13 05:15:27,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:27,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35005046] [2020-10-13 05:15:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:27,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:29,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:29,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:29,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:29,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:29,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:30,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:30,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:30,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:30,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:30,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:30,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:32,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:32,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:32,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:15:32,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-13 05:15:32,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 05:15:32,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:15:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:32,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:15:32,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:32,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:32,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:32,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:32,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:32,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:32,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:32,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:32,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:32,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:32,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:32,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:32,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35005046] [2020-10-13 05:15:32,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:32,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:15:32,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118560007] [2020-10-13 05:15:32,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:15:32,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:32,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:15:32,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:15:32,248 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 8 states. [2020-10-13 05:15:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:32,524 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2020-10-13 05:15:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:15:32,525 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 05:15:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:32,526 INFO L225 Difference]: With dead ends: 106 [2020-10-13 05:15:32,527 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 05:15:32,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:15:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 05:15:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2020-10-13 05:15:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:15:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2020-10-13 05:15:32,545 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 35 [2020-10-13 05:15:32,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:32,547 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2020-10-13 05:15:32,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:15:32,547 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2020-10-13 05:15:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 05:15:32,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:32,551 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] [2020-10-13 05:15:32,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:15:32,552 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:32,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1835474460, now seen corresponding path program 5 times [2020-10-13 05:15:32,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:32,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485080100] [2020-10-13 05:15:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:32,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:32,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:32,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:34,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:34,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:35,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:35,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:35,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:36,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:36,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:36,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:36,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:36,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:37,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:37,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:37,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:37,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:37,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:37,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:37,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 05:15:37,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-13 05:15:37,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-13 05:15:37,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:37,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:15:37,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:37,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:15:37,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:37,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:37,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:37,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:37,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:37,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:37,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:37,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:37,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:37,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:37,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:37,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485080100] [2020-10-13 05:15:37,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:37,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:15:37,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065049051] [2020-10-13 05:15:37,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:15:37,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:15:37,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:15:37,779 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand 9 states. [2020-10-13 05:15:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:38,035 INFO L93 Difference]: Finished difference Result 119 states and 165 transitions. [2020-10-13 05:15:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:15:38,036 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-13 05:15:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:38,037 INFO L225 Difference]: With dead ends: 119 [2020-10-13 05:15:38,037 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 05:15:38,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:15:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 05:15:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 62. [2020-10-13 05:15:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 05:15:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2020-10-13 05:15:38,059 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 40 [2020-10-13 05:15:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:38,059 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2020-10-13 05:15:38,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:15:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2020-10-13 05:15:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:15:38,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:38,061 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] [2020-10-13 05:15:38,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:15:38,062 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:38,064 INFO L82 PathProgramCache]: Analyzing trace with hash -756237252, now seen corresponding path program 6 times [2020-10-13 05:15:38,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:38,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818961188] [2020-10-13 05:15:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:38,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:38,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:38,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:38,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:38,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:38,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:39,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:39,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:39,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:39,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:39,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:39,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:39,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:40,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:40,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:40,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:40,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:41,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:41,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:41,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:42,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:42,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:42,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:42,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:42,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:43,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:43,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:43,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:15:43,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-13 05:15:43,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-13 05:15:43,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:15:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:15:43,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:43,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:43,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:43,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:43,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:43,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:43,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:43,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:43,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818961188] [2020-10-13 05:15:43,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:43,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:15:43,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76814580] [2020-10-13 05:15:43,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:15:43,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:43,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:15:43,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:15:43,228 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand 10 states. [2020-10-13 05:15:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:43,455 INFO L93 Difference]: Finished difference Result 132 states and 184 transitions. [2020-10-13 05:15:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:15:43,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-13 05:15:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:43,457 INFO L225 Difference]: With dead ends: 132 [2020-10-13 05:15:43,457 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 05:15:43,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:15:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 05:15:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 69. [2020-10-13 05:15:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:15:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-10-13 05:15:43,466 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 45 [2020-10-13 05:15:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:43,466 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-10-13 05:15:43,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:15:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-10-13 05:15:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:15:43,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:43,468 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] [2020-10-13 05:15:43,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:15:43,468 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1696307428, now seen corresponding path program 7 times [2020-10-13 05:15:43,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:43,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741616573] [2020-10-13 05:15:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:43,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:43,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:43,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:43,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:44,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:44,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:44,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:44,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:44,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:45,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:45,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:45,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:45,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:45,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:45,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:46,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:46,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:46,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:46,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:46,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:46,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:47,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:47,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:47,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:48,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:48,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:48,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:48,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:48,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:48,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:15:48,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-13 05:15:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-13 05:15:48,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:15:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:15:48,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:48,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:48,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:48,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:48,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:48,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:48,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:48,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:48,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:48,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741616573] [2020-10-13 05:15:48,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:48,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:15:48,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212417559] [2020-10-13 05:15:48,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:15:48,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:48,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:15:48,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:15:48,684 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 11 states. [2020-10-13 05:15:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:48,917 INFO L93 Difference]: Finished difference Result 145 states and 203 transitions. [2020-10-13 05:15:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:15:48,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-13 05:15:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:48,921 INFO L225 Difference]: With dead ends: 145 [2020-10-13 05:15:48,921 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 05:15:48,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:15:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 05:15:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2020-10-13 05:15:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:15:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2020-10-13 05:15:48,939 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 50 [2020-10-13 05:15:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:48,940 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2020-10-13 05:15:48,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:15:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2020-10-13 05:15:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:15:48,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:48,943 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] [2020-10-13 05:15:48,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:15:48,944 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:48,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589252, now seen corresponding path program 8 times [2020-10-13 05:15:48,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:48,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450069224] [2020-10-13 05:15:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:48,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:49,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:49,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:49,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:49,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:50,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:50,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:50,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:50,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:50,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:50,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:51,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:51,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:51,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:51,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:51,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:51,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:51,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:53,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:53,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:53,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:53,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:53,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:53,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:53,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:53,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:53,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:53,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:15:53,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 39 [2020-10-13 05:15:53,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:15:53,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:15:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:15:53,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:54,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:54,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:54,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:54,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:54,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:54,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:54,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:54,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:54,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:54,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:54,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:54,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450069224] [2020-10-13 05:15:54,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:54,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:15:54,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142600857] [2020-10-13 05:15:54,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:15:54,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:54,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:15:54,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:15:54,097 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand 12 states. [2020-10-13 05:15:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:54,320 INFO L93 Difference]: Finished difference Result 158 states and 222 transitions. [2020-10-13 05:15:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:15:54,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-13 05:15:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:54,322 INFO L225 Difference]: With dead ends: 158 [2020-10-13 05:15:54,323 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 05:15:54,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:15:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 05:15:54,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 83. [2020-10-13 05:15:54,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:15:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2020-10-13 05:15:54,331 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 55 [2020-10-13 05:15:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:54,331 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2020-10-13 05:15:54,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:15:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2020-10-13 05:15:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:15:54,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:54,332 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] [2020-10-13 05:15:54,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:15:54,333 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:54,333 INFO L82 PathProgramCache]: Analyzing trace with hash -119173148, now seen corresponding path program 9 times [2020-10-13 05:15:54,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:54,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6540381] [2020-10-13 05:15:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:54,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:54,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:54,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:54,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:54,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:54,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:55,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:58,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:58,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:58,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:58,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:58,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:58,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:58,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:59,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:59,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:59,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:59,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:15:59,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 51 [2020-10-13 05:15:59,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 05:15:59,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:59,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:15:59,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:59,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:15:59,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:59,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:59,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:59,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:59,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:59,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:59,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:59,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:59,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:59,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:59,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:59,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:59,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6540381] [2020-10-13 05:15:59,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:59,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:15:59,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186808660] [2020-10-13 05:15:59,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:15:59,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:59,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:15:59,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:15:59,528 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand 13 states. [2020-10-13 05:15:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:59,827 INFO L93 Difference]: Finished difference Result 171 states and 241 transitions. [2020-10-13 05:15:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:15:59,828 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-13 05:15:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:59,830 INFO L225 Difference]: With dead ends: 171 [2020-10-13 05:15:59,830 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 05:15:59,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:15:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 05:15:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-10-13 05:15:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 05:15:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 123 transitions. [2020-10-13 05:15:59,845 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 123 transitions. Word has length 60 [2020-10-13 05:15:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:59,845 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 123 transitions. [2020-10-13 05:15:59,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:15:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 123 transitions. [2020-10-13 05:15:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:15:59,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:59,849 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] [2020-10-13 05:15:59,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:15:59,850 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:59,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1734135356, now seen corresponding path program 10 times [2020-10-13 05:15:59,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:59,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436010566] [2020-10-13 05:15:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:59,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:59,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:00,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:00,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:00,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:01,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:01,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:01,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:01,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:02,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:02,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:02,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:02,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:02,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:03,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:03,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:04,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:04,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:04,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:16:04,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:16:04,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:16:04,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:04,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:16:04,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:04,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:16:04,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 30 [2020-10-13 05:16:05,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:05,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:05,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:05,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:05,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:05,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:05,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:05,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:05,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436010566] [2020-10-13 05:16:05,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:05,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:16:05,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986812002] [2020-10-13 05:16:05,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:16:05,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:05,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:16:05,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:16:05,048 INFO L87 Difference]: Start difference. First operand 90 states and 123 transitions. Second operand 14 states. [2020-10-13 05:16:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:05,368 INFO L93 Difference]: Finished difference Result 184 states and 260 transitions. [2020-10-13 05:16:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:16:05,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-13 05:16:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:05,370 INFO L225 Difference]: With dead ends: 184 [2020-10-13 05:16:05,370 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 05:16:05,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:16:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 05:16:05,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 97. [2020-10-13 05:16:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 05:16:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2020-10-13 05:16:05,379 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 65 [2020-10-13 05:16:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:05,379 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2020-10-13 05:16:05,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:16:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2020-10-13 05:16:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:16:05,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:05,380 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] [2020-10-13 05:16:05,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:16:05,381 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash -840513820, now seen corresponding path program 11 times [2020-10-13 05:16:05,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:05,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968500364] [2020-10-13 05:16:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:05,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:05,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:05,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:06,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:07,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:07,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:07,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:08,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:08,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:08,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:08,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:09,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:09,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:09,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:09,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:09,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:10,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:10,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:10,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:16:10,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 05:16:10,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:16:10,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:10,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:16:10,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:10,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 05:16:10,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:10,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:10,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:10,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:10,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:10,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:10,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:16:10,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:10,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:10,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:10,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:10,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:16:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:10,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968500364] [2020-10-13 05:16:10,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:10,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:16:10,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357762026] [2020-10-13 05:16:10,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:16:10,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:16:10,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:16:10,592 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand 15 states. [2020-10-13 05:16:11,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:11,019 INFO L93 Difference]: Finished difference Result 197 states and 279 transitions. [2020-10-13 05:16:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:16:11,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-13 05:16:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:11,024 INFO L225 Difference]: With dead ends: 197 [2020-10-13 05:16:11,024 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 05:16:11,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:16:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 05:16:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 104. [2020-10-13 05:16:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 05:16:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 143 transitions. [2020-10-13 05:16:11,049 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 143 transitions. Word has length 70 [2020-10-13 05:16:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:11,050 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 143 transitions. [2020-10-13 05:16:11,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:16:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 143 transitions. [2020-10-13 05:16:11,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:16:11,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:11,053 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] [2020-10-13 05:16:11,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:16:11,054 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:11,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:11,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1703278396, now seen corresponding path program 12 times [2020-10-13 05:16:11,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:11,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438497849] [2020-10-13 05:16:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:11,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:12,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:12,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:13,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:13,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:13,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:14,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:14,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:14,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:14,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:14,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:14,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:15,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:15,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:16,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:16,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:16:16,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 05:16:16,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:16:16,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:16:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:16:16,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:16,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:16,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:16,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:16,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:16,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:16,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:16:16,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:16,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:16,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:16,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:16,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:16:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:16,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438497849] [2020-10-13 05:16:16,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:16,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:16:16,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871536547] [2020-10-13 05:16:16,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:16:16,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:16,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:16:16,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:16:16,318 INFO L87 Difference]: Start difference. First operand 104 states and 143 transitions. Second operand 16 states. [2020-10-13 05:16:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:16,751 INFO L93 Difference]: Finished difference Result 210 states and 298 transitions. [2020-10-13 05:16:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:16:16,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-13 05:16:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:16,754 INFO L225 Difference]: With dead ends: 210 [2020-10-13 05:16:16,754 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 05:16:16,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:16:16,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 05:16:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 111. [2020-10-13 05:16:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 05:16:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2020-10-13 05:16:16,773 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 75 [2020-10-13 05:16:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:16,774 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2020-10-13 05:16:16,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:16:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2020-10-13 05:16:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 05:16:16,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:16,781 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] [2020-10-13 05:16:16,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:16:16,781 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:16,782 INFO L82 PathProgramCache]: Analyzing trace with hash 940522980, now seen corresponding path program 13 times [2020-10-13 05:16:16,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:16,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050379924] [2020-10-13 05:16:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:16,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:17,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:17,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:17,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:17,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:18,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:18,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:18,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:18,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:19,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:19,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:19,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:20,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:20,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:20,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:21,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:21,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:21,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:21,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 05:16:21,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:16:21,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:16:21,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:21,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:16:21,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:21,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 05:16:21,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:21,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:21,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:21,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:21,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:21,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:21,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:21,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:21,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:21,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:21,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:21,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:21,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050379924] [2020-10-13 05:16:21,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:21,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:16:21,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827652793] [2020-10-13 05:16:22,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:16:22,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:22,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:16:22,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:16:22,000 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand 17 states. [2020-10-13 05:16:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:22,397 INFO L93 Difference]: Finished difference Result 223 states and 317 transitions. [2020-10-13 05:16:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:16:22,400 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-10-13 05:16:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:22,401 INFO L225 Difference]: With dead ends: 223 [2020-10-13 05:16:22,402 INFO L226 Difference]: Without dead ends: 210 [2020-10-13 05:16:22,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:16:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-13 05:16:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 118. [2020-10-13 05:16:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 05:16:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2020-10-13 05:16:22,409 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 80 [2020-10-13 05:16:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:22,410 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2020-10-13 05:16:22,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:16:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2020-10-13 05:16:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 05:16:22,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:22,411 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] [2020-10-13 05:16:22,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:16:22,412 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:22,412 INFO L82 PathProgramCache]: Analyzing trace with hash 621797436, now seen corresponding path program 14 times [2020-10-13 05:16:22,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:22,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445575266] [2020-10-13 05:16:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:22,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:22,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:23,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:24,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:25,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:26,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:27,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:27,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:27,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 05:16:27,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:16:27,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5294 [2020-10-13 05:16:27,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:27,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:16:27,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:27,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 05:16:27,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:27,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:27,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:27,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:27,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:27,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:27,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:27,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:27,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:27,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:27,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:27,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:27,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445575266] [2020-10-13 05:16:27,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:27,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:16:27,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364414468] [2020-10-13 05:16:27,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:16:27,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:27,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:16:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:16:27,933 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand 18 states. [2020-10-13 05:16:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:28,296 INFO L93 Difference]: Finished difference Result 236 states and 336 transitions. [2020-10-13 05:16:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:16:28,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-13 05:16:28,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:28,298 INFO L225 Difference]: With dead ends: 236 [2020-10-13 05:16:28,298 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 05:16:28,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:16:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 05:16:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 125. [2020-10-13 05:16:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 05:16:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 173 transitions. [2020-10-13 05:16:28,315 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 173 transitions. Word has length 85 [2020-10-13 05:16:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:28,316 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 173 transitions. [2020-10-13 05:16:28,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:16:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 173 transitions. [2020-10-13 05:16:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 05:16:28,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:28,317 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] [2020-10-13 05:16:28,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:16:28,318 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:28,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1599010020, now seen corresponding path program 15 times [2020-10-13 05:16:28,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:28,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183555562] [2020-10-13 05:16:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:28,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:28,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:29,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:29,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:30,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:31,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:31,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:31,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:32,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:32,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:32,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:33,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:33,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:33,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:33,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 05:16:33,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:16:33,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 05:16:33,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:16:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 05:16:33,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:33,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:33,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:33,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:33,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:33,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:33,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:33,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:33,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:33,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183555562] [2020-10-13 05:16:33,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:33,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:16:33,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019367999] [2020-10-13 05:16:33,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:16:33,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:16:33,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:16:33,605 INFO L87 Difference]: Start difference. First operand 125 states and 173 transitions. Second operand 19 states. [2020-10-13 05:16:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:34,028 INFO L93 Difference]: Finished difference Result 249 states and 355 transitions. [2020-10-13 05:16:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:16:34,029 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-13 05:16:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:34,031 INFO L225 Difference]: With dead ends: 249 [2020-10-13 05:16:34,031 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 05:16:34,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:16:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 05:16:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 132. [2020-10-13 05:16:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 05:16:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 183 transitions. [2020-10-13 05:16:34,050 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 183 transitions. Word has length 90 [2020-10-13 05:16:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:34,050 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 183 transitions. [2020-10-13 05:16:34,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:16:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 183 transitions. [2020-10-13 05:16:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 05:16:34,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:34,053 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] [2020-10-13 05:16:34,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:16:34,053 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:34,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash -200636100, now seen corresponding path program 16 times [2020-10-13 05:16:34,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:34,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820008426] [2020-10-13 05:16:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:34,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:34,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:34,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:35,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:35,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:36,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:37,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:38,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:39,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:39,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 05:16:39,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:16:39,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5536 [2020-10-13 05:16:39,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:16:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 05:16:39,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:39,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:39,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:39,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:39,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:39,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:39,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:39,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:39,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:39,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:39,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:39,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:16:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:39,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820008426] [2020-10-13 05:16:39,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:39,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:16:39,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468983645] [2020-10-13 05:16:39,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:16:39,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:16:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:16:39,894 INFO L87 Difference]: Start difference. First operand 132 states and 183 transitions. Second operand 20 states. [2020-10-13 05:16:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:40,344 INFO L93 Difference]: Finished difference Result 262 states and 374 transitions. [2020-10-13 05:16:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:16:40,351 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-10-13 05:16:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:40,353 INFO L225 Difference]: With dead ends: 262 [2020-10-13 05:16:40,354 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 05:16:40,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:16:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 05:16:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 139. [2020-10-13 05:16:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 05:16:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2020-10-13 05:16:40,363 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 95 [2020-10-13 05:16:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:40,363 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2020-10-13 05:16:40,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:16:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2020-10-13 05:16:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 05:16:40,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:40,365 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] [2020-10-13 05:16:40,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:16:40,365 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:40,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:40,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1066789860, now seen corresponding path program 17 times [2020-10-13 05:16:40,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:40,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866518358] [2020-10-13 05:16:40,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:40,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:41,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:41,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:41,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:42,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:43,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:44,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:44,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:44,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:44,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:45,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:45,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:45,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 05:16:45,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:16:45,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-13 05:16:45,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:45,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:16:45,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:45,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 05:16:45,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:45,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:45,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:45,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:45,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:45,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:45,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:45,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:45,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:45,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866518358] [2020-10-13 05:16:45,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:45,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:16:45,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705654383] [2020-10-13 05:16:45,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:16:45,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:45,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:16:45,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:16:45,718 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 21 states. [2020-10-13 05:16:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:46,181 INFO L93 Difference]: Finished difference Result 275 states and 393 transitions. [2020-10-13 05:16:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:16:46,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-10-13 05:16:46,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:46,184 INFO L225 Difference]: With dead ends: 275 [2020-10-13 05:16:46,184 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 05:16:46,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:16:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 05:16:46,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 146. [2020-10-13 05:16:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 05:16:46,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 203 transitions. [2020-10-13 05:16:46,194 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 203 transitions. Word has length 100 [2020-10-13 05:16:46,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:46,194 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 203 transitions. [2020-10-13 05:16:46,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:16:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 203 transitions. [2020-10-13 05:16:46,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 05:16:46,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:46,195 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] [2020-10-13 05:16:46,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:16:46,196 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:46,196 INFO L82 PathProgramCache]: Analyzing trace with hash -863636932, now seen corresponding path program 18 times [2020-10-13 05:16:46,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:46,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587996389] [2020-10-13 05:16:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:46,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:46,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:46,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:47,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:47,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:48,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:49,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:49,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:50,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:51,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:51,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 05:16:51,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:16:51,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:16:51,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:51,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:16:51,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:51,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 05:16:51,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:51,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:51,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:51,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:51,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:51,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:51,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:51,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:51,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:51,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:51,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:51,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:51,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587996389] [2020-10-13 05:16:51,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:51,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:16:51,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116584051] [2020-10-13 05:16:51,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:16:51,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:51,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:16:51,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:16:51,498 INFO L87 Difference]: Start difference. First operand 146 states and 203 transitions. Second operand 22 states. [2020-10-13 05:16:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:52,019 INFO L93 Difference]: Finished difference Result 288 states and 412 transitions. [2020-10-13 05:16:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:16:52,020 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2020-10-13 05:16:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:52,022 INFO L225 Difference]: With dead ends: 288 [2020-10-13 05:16:52,022 INFO L226 Difference]: Without dead ends: 275 [2020-10-13 05:16:52,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:16:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-13 05:16:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 153. [2020-10-13 05:16:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 05:16:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 213 transitions. [2020-10-13 05:16:52,031 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 213 transitions. Word has length 105 [2020-10-13 05:16:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:52,032 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 213 transitions. [2020-10-13 05:16:52,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:16:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 213 transitions. [2020-10-13 05:16:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 05:16:52,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:52,033 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] [2020-10-13 05:16:52,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:16:52,033 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1462492444, now seen corresponding path program 19 times [2020-10-13 05:16:52,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:52,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557035777] [2020-10-13 05:16:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:52,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:52,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:53,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:54,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:55,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:55,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:56,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:57,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:57,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 05:16:57,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:16:57,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 05:16:57,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:57,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:16:57,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:57,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 05:16:57,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:57,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:57,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:57,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:57,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:57,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:57,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:57,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:57,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:57,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:57,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:57,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:57,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557035777] [2020-10-13 05:16:57,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:57,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:16:57,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460937119] [2020-10-13 05:16:57,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:16:57,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:57,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:16:57,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:16:57,390 INFO L87 Difference]: Start difference. First operand 153 states and 213 transitions. Second operand 23 states. [2020-10-13 05:16:57,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:57,882 INFO L93 Difference]: Finished difference Result 301 states and 431 transitions. [2020-10-13 05:16:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:16:57,883 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-10-13 05:16:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:57,885 INFO L225 Difference]: With dead ends: 301 [2020-10-13 05:16:57,885 INFO L226 Difference]: Without dead ends: 288 [2020-10-13 05:16:57,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:16:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-13 05:16:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 160. [2020-10-13 05:16:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 05:16:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 223 transitions. [2020-10-13 05:16:57,894 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 223 transitions. Word has length 110 [2020-10-13 05:16:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:57,895 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 223 transitions. [2020-10-13 05:16:57,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:16:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 223 transitions. [2020-10-13 05:16:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 05:16:57,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:57,896 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] [2020-10-13 05:16:57,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:16:57,897 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:57,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1418861372, now seen corresponding path program 20 times [2020-10-13 05:16:57,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:57,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718900164] [2020-10-13 05:16:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:57,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:58,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:00,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:04,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:04,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 05:17:04,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:17:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6327 [2020-10-13 05:17:04,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:04,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 05:17:04,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:04,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-13 05:17:04,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:17:06,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:06,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:06,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:06,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:06,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:06,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:06,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:06,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:06,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:06,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:06,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 34 proven. 167 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2020-10-13 05:17:06,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718900164] [2020-10-13 05:17:06,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:06,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:17:06,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94105356] [2020-10-13 05:17:06,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:17:06,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:06,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:17:06,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:17:06,280 INFO L87 Difference]: Start difference. First operand 160 states and 223 transitions. Second operand 11 states. [2020-10-13 05:17:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:07,042 INFO L93 Difference]: Finished difference Result 500 states and 696 transitions. [2020-10-13 05:17:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:17:07,044 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 115 [2020-10-13 05:17:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:07,046 INFO L225 Difference]: With dead ends: 500 [2020-10-13 05:17:07,046 INFO L226 Difference]: Without dead ends: 350 [2020-10-13 05:17:07,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 36 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:17:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-13 05:17:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 262. [2020-10-13 05:17:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 05:17:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 344 transitions. [2020-10-13 05:17:07,059 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 344 transitions. Word has length 115 [2020-10-13 05:17:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:07,059 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 344 transitions. [2020-10-13 05:17:07,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:17:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 344 transitions. [2020-10-13 05:17:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 05:17:07,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:07,061 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:07,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:17:07,062 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1538726932, now seen corresponding path program 1 times [2020-10-13 05:17:07,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:07,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834397066] [2020-10-13 05:17:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:07,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:08,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:10,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:12,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:12,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 05:17:12,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:17:12,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:17:12,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:17:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-13 05:17:12,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:12,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:12,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:12,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:12,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:12,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:12,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:17:12,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:12,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:12,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834397066] [2020-10-13 05:17:12,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:12,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:17:12,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135624377] [2020-10-13 05:17:12,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:17:12,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:12,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:17:12,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:17:12,435 INFO L87 Difference]: Start difference. First operand 262 states and 344 transitions. Second operand 24 states. [2020-10-13 05:17:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:13,007 INFO L93 Difference]: Finished difference Result 448 states and 605 transitions. [2020-10-13 05:17:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:17:13,008 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 116 [2020-10-13 05:17:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:13,010 INFO L225 Difference]: With dead ends: 448 [2020-10-13 05:17:13,010 INFO L226 Difference]: Without dead ends: 431 [2020-10-13 05:17:13,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:17:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-13 05:17:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 274. [2020-10-13 05:17:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-13 05:17:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 360 transitions. [2020-10-13 05:17:13,024 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 360 transitions. Word has length 116 [2020-10-13 05:17:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:13,024 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 360 transitions. [2020-10-13 05:17:13,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:17:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 360 transitions. [2020-10-13 05:17:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 05:17:13,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:13,026 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:13,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:17:13,027 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:13,027 INFO L82 PathProgramCache]: Analyzing trace with hash -963330252, now seen corresponding path program 2 times [2020-10-13 05:17:13,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:13,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363037147] [2020-10-13 05:17:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:13,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:13,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:15,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:17,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:18,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:18,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 05:17:18,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:17:18,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-13 05:17:18,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:17:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:18,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 05:17:18,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:18,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:18,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:18,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:18,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:18,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:18,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:18,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:18,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:18,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:18,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:18,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:18,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363037147] [2020-10-13 05:17:18,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:18,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:17:18,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197916351] [2020-10-13 05:17:18,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:17:18,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:17:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:17:18,490 INFO L87 Difference]: Start difference. First operand 274 states and 360 transitions. Second operand 25 states. [2020-10-13 05:17:19,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:19,001 INFO L93 Difference]: Finished difference Result 467 states and 631 transitions. [2020-10-13 05:17:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:17:19,002 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-10-13 05:17:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:19,005 INFO L225 Difference]: With dead ends: 467 [2020-10-13 05:17:19,005 INFO L226 Difference]: Without dead ends: 450 [2020-10-13 05:17:19,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:17:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-13 05:17:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 286. [2020-10-13 05:17:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-13 05:17:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 376 transitions. [2020-10-13 05:17:19,024 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 376 transitions. Word has length 121 [2020-10-13 05:17:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:19,024 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 376 transitions. [2020-10-13 05:17:19,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:17:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 376 transitions. [2020-10-13 05:17:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 05:17:19,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:19,026 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:19,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:17:19,027 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:19,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1957252884, now seen corresponding path program 3 times [2020-10-13 05:17:19,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:19,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910285205] [2020-10-13 05:17:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:19,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:19,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:22,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:23,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:25,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:25,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 05:17:25,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:17:25,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6529 [2020-10-13 05:17:25,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:17:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 05:17:25,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:25,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:25,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:25,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:25,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:25,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:25,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:25,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:25,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:25,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:25,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:25,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:25,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910285205] [2020-10-13 05:17:25,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:25,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:17:25,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703319333] [2020-10-13 05:17:25,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:17:25,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:25,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:17:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:17:25,975 INFO L87 Difference]: Start difference. First operand 286 states and 376 transitions. Second operand 26 states. [2020-10-13 05:17:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:26,547 INFO L93 Difference]: Finished difference Result 486 states and 657 transitions. [2020-10-13 05:17:26,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:17:26,548 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 126 [2020-10-13 05:17:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:26,552 INFO L225 Difference]: With dead ends: 486 [2020-10-13 05:17:26,552 INFO L226 Difference]: Without dead ends: 469 [2020-10-13 05:17:26,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:17:26,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-13 05:17:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 298. [2020-10-13 05:17:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-13 05:17:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 392 transitions. [2020-10-13 05:17:26,570 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 392 transitions. Word has length 126 [2020-10-13 05:17:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:26,570 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 392 transitions. [2020-10-13 05:17:26,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:17:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 392 transitions. [2020-10-13 05:17:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 05:17:26,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:26,572 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:26,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:17:26,572 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash 287248948, now seen corresponding path program 4 times [2020-10-13 05:17:26,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:26,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013936467] [2020-10-13 05:17:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:26,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:27,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:30,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:30,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:31,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:31,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 05:17:31,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:17:31,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 05:17:31,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:17:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-13 05:17:31,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:32,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:32,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:32,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:32,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:32,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:32,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:32,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:32,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:32,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:17:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:32,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013936467] [2020-10-13 05:17:32,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:32,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:17:32,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029534190] [2020-10-13 05:17:32,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:17:32,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:32,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:17:32,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:17:32,095 INFO L87 Difference]: Start difference. First operand 298 states and 392 transitions. Second operand 27 states. [2020-10-13 05:17:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:32,865 INFO L93 Difference]: Finished difference Result 505 states and 683 transitions. [2020-10-13 05:17:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:17:32,870 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2020-10-13 05:17:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:32,873 INFO L225 Difference]: With dead ends: 505 [2020-10-13 05:17:32,873 INFO L226 Difference]: Without dead ends: 488 [2020-10-13 05:17:32,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:17:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-13 05:17:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 310. [2020-10-13 05:17:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-13 05:17:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 408 transitions. [2020-10-13 05:17:32,888 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 408 transitions. Word has length 131 [2020-10-13 05:17:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:32,889 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 408 transitions. [2020-10-13 05:17:32,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:17:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 408 transitions. [2020-10-13 05:17:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 05:17:32,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:32,891 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:32,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:17:32,891 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:32,891 INFO L82 PathProgramCache]: Analyzing trace with hash -381141524, now seen corresponding path program 5 times [2020-10-13 05:17:32,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:32,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140728742] [2020-10-13 05:17:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:32,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:33,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:34,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:36,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:37,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:37,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 05:17:37,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:17:37,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:17:37,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:37,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:17:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-13 05:17:37,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:38,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:38,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:38,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:38,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:38,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:38,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:38,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:38,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:38,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140728742] [2020-10-13 05:17:38,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:38,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:17:38,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570436349] [2020-10-13 05:17:38,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:17:38,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:38,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:17:38,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:17:38,390 INFO L87 Difference]: Start difference. First operand 310 states and 408 transitions. Second operand 28 states. [2020-10-13 05:17:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:39,375 INFO L93 Difference]: Finished difference Result 524 states and 709 transitions. [2020-10-13 05:17:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:17:39,376 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2020-10-13 05:17:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:39,380 INFO L225 Difference]: With dead ends: 524 [2020-10-13 05:17:39,381 INFO L226 Difference]: Without dead ends: 507 [2020-10-13 05:17:39,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:17:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-10-13 05:17:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 322. [2020-10-13 05:17:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-13 05:17:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 424 transitions. [2020-10-13 05:17:39,406 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 424 transitions. Word has length 136 [2020-10-13 05:17:39,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:39,407 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 424 transitions. [2020-10-13 05:17:39,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:17:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 424 transitions. [2020-10-13 05:17:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 05:17:39,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:39,409 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:39,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:17:39,410 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:39,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1562223924, now seen corresponding path program 6 times [2020-10-13 05:17:39,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:39,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936003428] [2020-10-13 05:17:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:39,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:40,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:43,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:45,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:45,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 05:17:45,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:17:45,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5943 [2020-10-13 05:17:45,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:17:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-13 05:17:45,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:45,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:45,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:45,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:45,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:45,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:45,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:45,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:45,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:45,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936003428] [2020-10-13 05:17:45,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:45,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:17:45,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404292648] [2020-10-13 05:17:45,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:17:45,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:45,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:17:45,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:17:45,870 INFO L87 Difference]: Start difference. First operand 322 states and 424 transitions. Second operand 29 states. [2020-10-13 05:17:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:46,455 INFO L93 Difference]: Finished difference Result 543 states and 735 transitions. [2020-10-13 05:17:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:17:46,456 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 141 [2020-10-13 05:17:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:46,459 INFO L225 Difference]: With dead ends: 543 [2020-10-13 05:17:46,460 INFO L226 Difference]: Without dead ends: 526 [2020-10-13 05:17:46,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:17:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-10-13 05:17:46,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 334. [2020-10-13 05:17:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-13 05:17:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 440 transitions. [2020-10-13 05:17:46,475 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 440 transitions. Word has length 141 [2020-10-13 05:17:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:46,476 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 440 transitions. [2020-10-13 05:17:46,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:17:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 440 transitions. [2020-10-13 05:17:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 05:17:46,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:46,477 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:46,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:17:46,477 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:46,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:46,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1148029676, now seen corresponding path program 7 times [2020-10-13 05:17:46,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:46,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807828540] [2020-10-13 05:17:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:46,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:47,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:50,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:51,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:51,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 05:17:51,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:17:51,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 05:17:51,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:17:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-13 05:17:51,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:52,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:52,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:52,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:52,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:52,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:52,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:17:52,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:52,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:17:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:52,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807828540] [2020-10-13 05:17:52,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:52,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:17:52,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272677634] [2020-10-13 05:17:52,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:17:52,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:52,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:17:52,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:17:52,221 INFO L87 Difference]: Start difference. First operand 334 states and 440 transitions. Second operand 30 states. [2020-10-13 05:17:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:52,941 INFO L93 Difference]: Finished difference Result 562 states and 761 transitions. [2020-10-13 05:17:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:17:52,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2020-10-13 05:17:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:52,947 INFO L225 Difference]: With dead ends: 562 [2020-10-13 05:17:52,947 INFO L226 Difference]: Without dead ends: 545 [2020-10-13 05:17:52,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:17:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-10-13 05:17:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 346. [2020-10-13 05:17:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-13 05:17:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 456 transitions. [2020-10-13 05:17:52,966 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 456 transitions. Word has length 146 [2020-10-13 05:17:52,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:52,966 INFO L479 AbstractCegarLoop]: Abstraction has 346 states and 456 transitions. [2020-10-13 05:17:52,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:17:52,967 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 456 transitions. [2020-10-13 05:17:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 05:17:52,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:52,968 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:52,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:17:52,969 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1774159820, now seen corresponding path program 8 times [2020-10-13 05:17:52,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:52,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560415286] [2020-10-13 05:17:52,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:53,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:54,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:58,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:58,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 05:17:58,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:58,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 05:17:58,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:17:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-13 05:17:58,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:58,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:58,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:58,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:58,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:58,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:58,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:58,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:58,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:58,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:58,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:58,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:17:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:58,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560415286] [2020-10-13 05:17:58,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:58,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:17:58,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402934509] [2020-10-13 05:17:58,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:17:58,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:58,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:17:58,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:17:58,636 INFO L87 Difference]: Start difference. First operand 346 states and 456 transitions. Second operand 31 states. [2020-10-13 05:17:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:59,832 INFO L93 Difference]: Finished difference Result 581 states and 787 transitions. [2020-10-13 05:17:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:17:59,833 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 151 [2020-10-13 05:17:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:59,838 INFO L225 Difference]: With dead ends: 581 [2020-10-13 05:17:59,838 INFO L226 Difference]: Without dead ends: 564 [2020-10-13 05:17:59,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:17:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-13 05:17:59,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 358. [2020-10-13 05:17:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-13 05:17:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 472 transitions. [2020-10-13 05:17:59,866 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 472 transitions. Word has length 151 [2020-10-13 05:17:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:59,867 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 472 transitions. [2020-10-13 05:17:59,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:17:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 472 transitions. [2020-10-13 05:17:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 05:17:59,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:59,870 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:59,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:17:59,871 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:59,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2132187116, now seen corresponding path program 9 times [2020-10-13 05:17:59,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:59,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240879341] [2020-10-13 05:17:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:59,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:01,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:04,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:05,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:05,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 05:18:05,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:18:05,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5299 [2020-10-13 05:18:05,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:18:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-13 05:18:05,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:05,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:05,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:05,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:05,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:05,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:05,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:05,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:05,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:05,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:05,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:05,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240879341] [2020-10-13 05:18:05,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:05,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:18:05,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629896063] [2020-10-13 05:18:05,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:18:05,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:05,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:18:05,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:18:05,863 INFO L87 Difference]: Start difference. First operand 358 states and 472 transitions. Second operand 32 states. [2020-10-13 05:18:06,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:06,619 INFO L93 Difference]: Finished difference Result 600 states and 813 transitions. [2020-10-13 05:18:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:18:06,620 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2020-10-13 05:18:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:06,623 INFO L225 Difference]: With dead ends: 600 [2020-10-13 05:18:06,624 INFO L226 Difference]: Without dead ends: 583 [2020-10-13 05:18:06,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:18:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2020-10-13 05:18:06,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 370. [2020-10-13 05:18:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-13 05:18:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 488 transitions. [2020-10-13 05:18:06,641 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 488 transitions. Word has length 156 [2020-10-13 05:18:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:06,641 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 488 transitions. [2020-10-13 05:18:06,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:18:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 488 transitions. [2020-10-13 05:18:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 05:18:06,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:06,643 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:06,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:18:06,643 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:06,644 INFO L82 PathProgramCache]: Analyzing trace with hash -868775116, now seen corresponding path program 10 times [2020-10-13 05:18:06,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:06,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505394089] [2020-10-13 05:18:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:06,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:07,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:11,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:15,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:15,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 05:18:15,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:18:15,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8778 [2020-10-13 05:18:15,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:18:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:15,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-13 05:18:15,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:16,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:16,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:16,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:16,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:16,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:16,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:16,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:16,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:16,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:16,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:16,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:16,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505394089] [2020-10-13 05:18:16,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:16,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:18:16,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265703000] [2020-10-13 05:18:16,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:18:16,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:18:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:18:16,073 INFO L87 Difference]: Start difference. First operand 370 states and 488 transitions. Second operand 33 states. [2020-10-13 05:18:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:17,061 INFO L93 Difference]: Finished difference Result 619 states and 839 transitions. [2020-10-13 05:18:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:18:17,061 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 161 [2020-10-13 05:18:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:17,065 INFO L225 Difference]: With dead ends: 619 [2020-10-13 05:18:17,065 INFO L226 Difference]: Without dead ends: 602 [2020-10-13 05:18:17,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:18:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-13 05:18:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 382. [2020-10-13 05:18:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-13 05:18:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 504 transitions. [2020-10-13 05:18:17,093 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 504 transitions. Word has length 161 [2020-10-13 05:18:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:17,093 INFO L479 AbstractCegarLoop]: Abstraction has 382 states and 504 transitions. [2020-10-13 05:18:17,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:18:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 504 transitions. [2020-10-13 05:18:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 05:18:17,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:17,095 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:17,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:18:17,095 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:17,096 INFO L82 PathProgramCache]: Analyzing trace with hash -678206228, now seen corresponding path program 11 times [2020-10-13 05:18:17,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:17,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046293102] [2020-10-13 05:18:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:17,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:18,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:19,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:22,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:22,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 05:18:22,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:18:22,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 05:18:22,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:18:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-13 05:18:22,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:22,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:22,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:22,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:22,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:22,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:22,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:22,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:22,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:22,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:22,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:22,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:22,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046293102] [2020-10-13 05:18:22,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:22,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:18:22,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104869804] [2020-10-13 05:18:22,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:18:22,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:22,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:18:22,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:18:22,792 INFO L87 Difference]: Start difference. First operand 382 states and 504 transitions. Second operand 34 states. [2020-10-13 05:18:23,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:23,707 INFO L93 Difference]: Finished difference Result 638 states and 865 transitions. [2020-10-13 05:18:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:18:23,708 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 166 [2020-10-13 05:18:23,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:23,712 INFO L225 Difference]: With dead ends: 638 [2020-10-13 05:18:23,712 INFO L226 Difference]: Without dead ends: 621 [2020-10-13 05:18:23,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:18:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-13 05:18:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 394. [2020-10-13 05:18:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-13 05:18:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 520 transitions. [2020-10-13 05:18:23,740 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 520 transitions. Word has length 166 [2020-10-13 05:18:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:23,741 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 520 transitions. [2020-10-13 05:18:23,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:18:23,742 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 520 transitions. [2020-10-13 05:18:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 05:18:23,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:23,744 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:23,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:18:23,744 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:23,745 INFO L82 PathProgramCache]: Analyzing trace with hash 850583092, now seen corresponding path program 12 times [2020-10-13 05:18:23,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:23,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690065657] [2020-10-13 05:18:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:23,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:25,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:27,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:31,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:31,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 05:18:31,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:18:31,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8089 [2020-10-13 05:18:31,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:31,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:18:31,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:31,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-13 05:18:31,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:32,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:32,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:32,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:32,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:32,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:32,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:32,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:32,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:32,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690065657] [2020-10-13 05:18:32,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:32,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:18:32,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62833095] [2020-10-13 05:18:32,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:18:32,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:32,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:18:32,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:18:32,586 INFO L87 Difference]: Start difference. First operand 394 states and 520 transitions. Second operand 35 states. [2020-10-13 05:18:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:33,564 INFO L93 Difference]: Finished difference Result 657 states and 891 transitions. [2020-10-13 05:18:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:18:33,564 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 171 [2020-10-13 05:18:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:33,567 INFO L225 Difference]: With dead ends: 657 [2020-10-13 05:18:33,567 INFO L226 Difference]: Without dead ends: 640 [2020-10-13 05:18:33,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:18:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-13 05:18:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 406. [2020-10-13 05:18:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-13 05:18:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 536 transitions. [2020-10-13 05:18:33,588 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 536 transitions. Word has length 171 [2020-10-13 05:18:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:33,588 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 536 transitions. [2020-10-13 05:18:33,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:18:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 536 transitions. [2020-10-13 05:18:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-13 05:18:33,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:33,590 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:33,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:18:33,591 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:33,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:33,591 INFO L82 PathProgramCache]: Analyzing trace with hash -399248916, now seen corresponding path program 13 times [2020-10-13 05:18:33,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:33,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150449507] [2020-10-13 05:18:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:33,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:35,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:38,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:38,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 05:18:38,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:38,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 05:18:38,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:38,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:18:38,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:38,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-13 05:18:38,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:39,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:39,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:39,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:39,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:39,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:39,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:39,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:39,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:39,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:39,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:39,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:39,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150449507] [2020-10-13 05:18:39,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:39,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:18:39,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021047438] [2020-10-13 05:18:39,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:18:39,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:39,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:18:39,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:18:39,391 INFO L87 Difference]: Start difference. First operand 406 states and 536 transitions. Second operand 36 states. [2020-10-13 05:18:40,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:40,587 INFO L93 Difference]: Finished difference Result 676 states and 917 transitions. [2020-10-13 05:18:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:18:40,588 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 176 [2020-10-13 05:18:40,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:40,593 INFO L225 Difference]: With dead ends: 676 [2020-10-13 05:18:40,593 INFO L226 Difference]: Without dead ends: 659 [2020-10-13 05:18:40,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:18:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-13 05:18:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 418. [2020-10-13 05:18:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-13 05:18:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 552 transitions. [2020-10-13 05:18:40,624 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 552 transitions. Word has length 176 [2020-10-13 05:18:40,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:40,625 INFO L479 AbstractCegarLoop]: Abstraction has 418 states and 552 transitions. [2020-10-13 05:18:40,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:18:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 552 transitions. [2020-10-13 05:18:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 05:18:40,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:40,627 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:40,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:18:40,627 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash 560099636, now seen corresponding path program 14 times [2020-10-13 05:18:40,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:40,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873620627] [2020-10-13 05:18:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:40,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:42,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:43,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:45,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:45,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 05:18:45,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:18:45,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:18:45,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:18:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-13 05:18:45,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:46,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:46,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:46,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:46,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:46,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:46,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:46,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:46,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:46,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:46,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:46,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:46,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873620627] [2020-10-13 05:18:46,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:46,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:18:46,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680899339] [2020-10-13 05:18:46,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:18:46,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:46,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:18:46,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:18:46,440 INFO L87 Difference]: Start difference. First operand 418 states and 552 transitions. Second operand 37 states. [2020-10-13 05:18:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:47,439 INFO L93 Difference]: Finished difference Result 695 states and 943 transitions. [2020-10-13 05:18:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:18:47,440 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 181 [2020-10-13 05:18:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:47,443 INFO L225 Difference]: With dead ends: 695 [2020-10-13 05:18:47,443 INFO L226 Difference]: Without dead ends: 678 [2020-10-13 05:18:47,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:18:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-10-13 05:18:47,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 430. [2020-10-13 05:18:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-10-13 05:18:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 568 transitions. [2020-10-13 05:18:47,464 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 568 transitions. Word has length 181 [2020-10-13 05:18:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:47,464 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 568 transitions. [2020-10-13 05:18:47,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:18:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 568 transitions. [2020-10-13 05:18:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 05:18:47,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:47,466 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:47,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:18:47,467 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1488437524, now seen corresponding path program 15 times [2020-10-13 05:18:47,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:47,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919482247] [2020-10-13 05:18:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:47,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking...