/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:44:39,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:44:39,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:44:39,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:44:39,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:44:39,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:44:39,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:44:39,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:44:39,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:44:39,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:44:39,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:44:39,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:44:39,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:44:39,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:44:39,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:44:39,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:44:39,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:44:39,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:44:39,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:44:39,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:44:39,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:44:39,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:44:39,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:44:39,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:44:39,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:44:39,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:44:39,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:44:39,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:44:39,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:44:39,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-26 19:44:39,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:44:39,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:44:39,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:44:39,338 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 [2020-10-26 19:44:39,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:44:39,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:44:39,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:44:39,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:44:39,374 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:44:39,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:44:39,374 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:44:39,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:44:39,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:44:39,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:44:39,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:44:39,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:44:39,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:44:39,377 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:44:39,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:44:39,377 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:44:39,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:44:39,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:44:39,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:44:39,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:44:39,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:44:39,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:44:39,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:44:39,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:44:39,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:44:39,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:44:39,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:44:39,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:44:39,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:44:39,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:44:39,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:44:39,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:44:39,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:44:39,899 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:44:39,900 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:44:39,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-10-26 19:44:39,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8b1f1461/c54cf298761d44c3a76c4dd755b91a6c/FLAG3d8dad3c5 [2020-10-26 19:44:40,672 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:44:40,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-10-26 19:44:40,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8b1f1461/c54cf298761d44c3a76c4dd755b91a6c/FLAG3d8dad3c5 [2020-10-26 19:44:41,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8b1f1461/c54cf298761d44c3a76c4dd755b91a6c [2020-10-26 19:44:41,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:44:41,024 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:44:41,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:44:41,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:44:41,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:44:41,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:44:41" (1/1) ... [2020-10-26 19:44:41,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b7e80ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41, skipping insertion in model container [2020-10-26 19:44:41,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:44:41" (1/1) ... [2020-10-26 19:44:41,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:44:41,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:44:41,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:44:41,255 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:44:41,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:44:41,315 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:44:41,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41 WrapperNode [2020-10-26 19:44:41,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:44:41,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:44:41,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:44:41,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:44:41,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41" (1/1) ... [2020-10-26 19:44:41,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41" (1/1) ... [2020-10-26 19:44:41,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41" (1/1) ... [2020-10-26 19:44:41,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41" (1/1) ... [2020-10-26 19:44:41,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41" (1/1) ... [2020-10-26 19:44:41,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41" (1/1) ... [2020-10-26 19:44:41,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41" (1/1) ... [2020-10-26 19:44:41,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:44:41,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:44:41,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:44:41,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:44:41,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41" (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 [2020-10-26 19:44:41,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:44:41,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:44:41,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:44:41,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:44:41,512 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-26 19:44:41,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:44:41,512 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:44:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:44:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:44:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:44:41,514 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:44:41,515 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:44:41,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:44:41,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:44:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-26 19:44:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:44:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-26 19:44:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:44:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-26 19:44:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:44:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:44:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:44:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:44:41,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:44:41,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:44:42,127 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:44:42,127 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:44:42,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:44:42 BoogieIcfgContainer [2020-10-26 19:44:42,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:44:42,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:44:42,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:44:42,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:44:42,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:44:41" (1/3) ... [2020-10-26 19:44:42,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63667fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:44:42, skipping insertion in model container [2020-10-26 19:44:42,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:41" (2/3) ... [2020-10-26 19:44:42,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63667fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:44:42, skipping insertion in model container [2020-10-26 19:44:42,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:44:42" (3/3) ... [2020-10-26 19:44:42,145 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-10-26 19:44:42,159 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:44:42,165 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:44:42,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:44:42,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:44:42,211 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:44:42,211 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:44:42,211 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:44:42,211 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:44:42,211 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:44:42,211 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:44:42,212 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:44:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:44:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:44:42,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:42,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:42,235 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:42,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1917384497, now seen corresponding path program 1 times [2020-10-26 19:44:42,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:42,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950401729] [2020-10-26 19:44:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:42,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:42,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:42,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:42,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:44:42,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:42,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-26 19:44:42,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:42,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:42,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-26 19:44:42,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:42,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:44:42,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:42,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:42,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:42,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:42,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:42,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:44:42,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:42,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:42,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:42,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:42,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:42,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:42,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:42,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:42,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:42,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:42,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:44:42,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:42,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:42,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:44:42,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:42,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:42,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950401729] [2020-10-26 19:44:42,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:44:42,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:44:42,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317995506] [2020-10-26 19:44:42,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:44:42,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:44:42,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:44:42,960 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-10-26 19:44:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:43,238 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-10-26 19:44:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:44:43,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-26 19:44:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:43,251 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:44:43,252 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:44:43,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:44:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:44:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-26 19:44:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:44:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:44:43,305 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-10-26 19:44:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:43,306 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:44:43,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:44:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:44:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:44:43,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:43,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:43,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:44:43,308 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:43,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1115967253, now seen corresponding path program 1 times [2020-10-26 19:44:43,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:43,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482952452] [2020-10-26 19:44:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:43,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:43,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:43,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:43,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:44:43,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-26 19:44:43,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:43,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:44:43,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:43,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:44:43,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 19:44:43,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:43,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:43,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:43,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:43,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:43,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:44:43,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:43,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:43,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:43,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:43,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:43,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:43,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:43,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:43,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:43,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 19:44:43,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:43,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:44:43,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:43,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:43,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:43,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482952452] [2020-10-26 19:44:43,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:44:43,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 19:44:43,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069628935] [2020-10-26 19:44:43,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:44:43,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:44:43,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:44:43,954 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-26 19:44:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:44,308 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-26 19:44:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:44:44,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-26 19:44:44,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:44,310 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:44:44,310 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:44:44,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:44:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:44:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-26 19:44:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:44:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-26 19:44:44,321 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-10-26 19:44:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:44,321 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-26 19:44:44,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:44:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-26 19:44:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:44:44,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:44,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:44,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:44:44,323 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:44,324 INFO L82 PathProgramCache]: Analyzing trace with hash -891180873, now seen corresponding path program 1 times [2020-10-26 19:44:44,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:44,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796863436] [2020-10-26 19:44:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:44,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:44,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:44,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:44,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:44:44,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:44,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-26 19:44:44,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:44,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:44:44,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:44,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:44,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:44,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:44,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:44,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:44,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:44,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:44:44,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:44,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:44,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:44,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:44,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:44,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:44,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:44,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:44,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 19:44:44,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:44,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 19:44:44,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:44,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:44:44,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:44,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:44:44,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:45,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796863436] [2020-10-26 19:44:45,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:45,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:44:45,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507693604] [2020-10-26 19:44:45,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:44:45,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:45,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:44:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:44:45,021 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-10-26 19:44:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:45,289 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-26 19:44:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:44:45,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-26 19:44:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:45,291 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:44:45,291 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:44:45,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:44:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:44:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-26 19:44:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:44:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-26 19:44:45,301 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-26 19:44:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:45,301 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-26 19:44:45,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:44:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-26 19:44:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:44:45,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:45,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:45,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:44:45,303 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:45,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1320214055, now seen corresponding path program 2 times [2020-10-26 19:44:45,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:45,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087335639] [2020-10-26 19:44:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:45,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:45,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:45,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:45,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:44:45,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:45,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-26 19:44:45,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:45,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:44:45,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:45,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:44:45,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:45,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:45,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:45,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:45,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:45,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:45,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:44:45,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:45,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:45,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:45,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:45,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:45,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 19:44:45,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:45,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 19:44:45,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:45,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:44:45,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:45,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:44:45,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:45,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087335639] [2020-10-26 19:44:45,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:45,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:44:45,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143530840] [2020-10-26 19:44:45,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:44:45,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:45,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:44:45,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:44:45,875 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-10-26 19:44:46,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:46,090 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-26 19:44:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:44:46,090 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-26 19:44:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:46,091 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:44:46,092 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:44:46,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:44:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:44:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:44:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:44:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-26 19:44:46,100 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-10-26 19:44:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:46,100 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-26 19:44:46,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:44:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-26 19:44:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:44:46,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:46,102 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:46,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:44:46,102 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:46,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1304241541, now seen corresponding path program 3 times [2020-10-26 19:44:46,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:46,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065316331] [2020-10-26 19:44:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:46,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:46,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:44:46,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:46,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-26 19:44:46,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:44:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:44:46,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:46,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:46,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:46,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:46,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:46,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:46,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:46,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:46,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:44:46,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:46,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 19:44:46,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:44:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:44:46,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:46,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065316331] [2020-10-26 19:44:46,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:46,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:44:46,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686002983] [2020-10-26 19:44:46,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:44:46,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:46,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:44:46,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:44:46,649 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-10-26 19:44:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:46,858 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-26 19:44:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:44:46,859 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-26 19:44:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:46,860 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:44:46,860 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:44:46,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:44:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:44:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:44:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:44:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-26 19:44:46,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-10-26 19:44:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:46,869 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-26 19:44:46,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:44:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-26 19:44:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:44:46,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:46,870 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:46,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:44:46,870 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:46,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:46,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1160442525, now seen corresponding path program 4 times [2020-10-26 19:44:46,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:46,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122124175] [2020-10-26 19:44:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:46,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:47,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:47,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:44:47,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:47,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-26 19:44:47,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:47,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:44:47,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:47,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:44:47,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:44:47,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:47,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:47,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:47,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:47,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:47,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:44:47,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:47,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:47,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:47,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:47,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:47,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:47,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:47,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:47,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 19:44:47,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:47,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 19:44:47,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:47,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:44:47,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:47,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:44:47,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:47,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122124175] [2020-10-26 19:44:47,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:47,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:44:47,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555023426] [2020-10-26 19:44:47,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:44:47,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:47,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:44:47,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:44:47,701 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 10 states. [2020-10-26 19:44:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:47,940 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-26 19:44:47,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:44:47,940 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-26 19:44:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:47,941 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:44:47,941 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:44:47,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:44:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:44:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-26 19:44:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:44:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 19:44:47,949 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-10-26 19:44:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:47,949 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 19:44:47,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:44:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 19:44:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:44:47,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:47,950 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:47,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:44:47,951 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1100117441, now seen corresponding path program 5 times [2020-10-26 19:44:47,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:47,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279277631] [2020-10-26 19:44:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:47,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:48,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:48,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:44:48,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:48,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-26 19:44:48,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:44:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:44:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:48,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:48,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:48,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:48,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:48,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:48,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:48,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:48,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:48,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:48,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:48,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:48,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:48,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:48,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:48,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 19:44:48,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:48,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 19:44:48,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:48,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:44:48,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:48,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:44:48,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:48,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279277631] [2020-10-26 19:44:48,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:48,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:44:48,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734515780] [2020-10-26 19:44:48,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:44:48,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:48,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:44:48,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:44:48,871 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 11 states. [2020-10-26 19:44:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:49,118 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-26 19:44:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:44:49,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-26 19:44:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:49,120 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:44:49,120 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:44:49,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:44:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:44:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-26 19:44:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:44:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-26 19:44:49,127 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-10-26 19:44:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:49,127 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-26 19:44:49,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:44:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-26 19:44:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:44:49,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:49,128 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:49,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:44:49,129 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:49,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:49,129 INFO L82 PathProgramCache]: Analyzing trace with hash -244792991, now seen corresponding path program 6 times [2020-10-26 19:44:49,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:49,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609890475] [2020-10-26 19:44:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:49,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:49,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:49,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:49,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:44:49,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:49,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-26 19:44:49,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:49,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:44:49,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:49,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:44:49,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:50,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:50,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:50,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:50,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:50,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:50,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:50,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:50,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:50,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:50,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:50,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:50,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:50,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:50,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:50,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 19:44:50,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:50,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-26 19:44:50,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:44:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:44:50,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:50,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609890475] [2020-10-26 19:44:50,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:50,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:44:50,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883781821] [2020-10-26 19:44:50,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:44:50,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:50,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:44:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:44:50,630 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2020-10-26 19:44:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:50,896 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-26 19:44:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:44:50,896 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-26 19:44:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:50,898 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:44:50,898 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:44:50,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:44:50,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:44:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:44:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:44:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-26 19:44:50,905 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-10-26 19:44:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:50,906 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-26 19:44:50,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:44:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-26 19:44:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:44:50,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:50,907 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:50,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:44:50,907 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1383249923, now seen corresponding path program 7 times [2020-10-26 19:44:50,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:50,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295824440] [2020-10-26 19:44:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:50,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:50,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:51,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:51,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:44:51,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:51,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-26 19:44:51,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:44:51,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:51,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:44:51,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:51,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:51,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:51,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:51,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:51,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:51,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:51,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:51,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:51,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:51,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:51,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:51,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:51,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:51,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:51,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 19:44:51,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:51,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-26 19:44:51,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:51,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:44:51,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:51,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:44:51,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:52,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295824440] [2020-10-26 19:44:52,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:52,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:44:52,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915817133] [2020-10-26 19:44:52,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:44:52,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:52,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:44:52,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:44:52,061 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 13 states. [2020-10-26 19:44:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:52,313 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-26 19:44:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:44:52,313 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-26 19:44:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:52,315 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:44:52,315 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:44:52,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:44:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:44:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:44:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:44:52,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:44:52,323 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-10-26 19:44:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:52,323 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:44:52,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:44:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:44:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:44:52,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:52,324 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:52,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:44:52,324 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:52,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1730572763, now seen corresponding path program 8 times [2020-10-26 19:44:52,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:52,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883032510] [2020-10-26 19:44:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:52,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:52,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:53,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:53,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:44:53,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:53,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-26 19:44:53,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:53,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:44:53,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:53,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:44:53,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:53,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:53,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:53,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:53,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:53,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:53,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:53,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:53,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:53,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:53,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:53,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:53,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:53,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:53,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 19:44:53,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:53,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-26 19:44:53,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:44:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:44:53,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:54,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883032510] [2020-10-26 19:44:54,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:54,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:44:54,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601301378] [2020-10-26 19:44:54,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:44:54,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:54,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:44:54,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:44:54,070 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2020-10-26 19:44:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:54,407 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-26 19:44:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:44:54,407 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-26 19:44:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:54,408 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:44:54,408 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:44:54,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:44:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:44:54,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 19:44:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:44:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-26 19:44:54,416 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-10-26 19:44:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:54,416 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-26 19:44:54,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:44:54,417 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-26 19:44:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:44:54,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:54,418 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:54,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:44:54,418 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:54,419 INFO L82 PathProgramCache]: Analyzing trace with hash -521968697, now seen corresponding path program 9 times [2020-10-26 19:44:54,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:54,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400134322] [2020-10-26 19:44:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:54,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:55,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:44:55,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:55,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1105 [2020-10-26 19:44:55,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:55,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:44:55,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:55,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:44:55,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:55,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:55,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:55,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:55,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:55,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:55,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:55,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:55,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:55,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:55,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:55,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:55,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:55,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:44:55,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:55,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-26 19:44:55,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:55,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:44:55,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:55,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:44:55,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:56,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400134322] [2020-10-26 19:44:56,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:56,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:44:56,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32376730] [2020-10-26 19:44:56,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:44:56,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:44:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:44:56,166 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 15 states. [2020-10-26 19:44:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:56,510 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-26 19:44:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:44:56,511 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-26 19:44:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:56,512 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:44:56,512 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:44:56,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:44:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:44:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:44:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:44:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-26 19:44:56,522 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-26 19:44:56,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:56,522 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-26 19:44:56,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:44:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-26 19:44:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:44:56,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:56,523 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:56,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:44:56,524 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1305368809, now seen corresponding path program 10 times [2020-10-26 19:44:56,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:56,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066500498] [2020-10-26 19:44:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:56,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:56,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:57,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:57,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:44:57,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:57,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-26 19:44:57,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:57,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:44:57,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:44:57,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:44:57,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:57,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:58,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:58,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:58,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:58,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:58,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:58,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:58,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:58,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:58,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:58,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:58,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:44:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:58,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:58,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:58,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:44:58,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:58,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-26 19:44:58,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:58,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:44:58,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:44:58,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:44:58,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:58,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066500498] [2020-10-26 19:44:58,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:58,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:44:58,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872982880] [2020-10-26 19:44:58,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:44:58,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:58,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:44:58,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:44:58,893 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 16 states. [2020-10-26 19:44:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:59,272 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-26 19:44:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:44:59,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-26 19:44:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:59,274 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:44:59,274 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:44:59,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:44:59,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:44:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:44:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:44:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-26 19:44:59,282 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-26 19:44:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:59,282 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-26 19:44:59,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:44:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-26 19:44:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:44:59,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:59,284 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:59,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:44:59,284 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash 735088011, now seen corresponding path program 11 times [2020-10-26 19:44:59,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:59,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461232301] [2020-10-26 19:44:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:59,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:59,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:00,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:00,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:45:00,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:00,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-26 19:45:00,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:00,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:45:00,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:00,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:45:00,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:00,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:00,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:00,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:00,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:00,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:45:00,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:00,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:00,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:00,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:00,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:01,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:01,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:45:01,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:01,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-26 19:45:01,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:45:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:45:01,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:01,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461232301] [2020-10-26 19:45:01,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:01,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:45:01,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941785936] [2020-10-26 19:45:01,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:45:01,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:45:01,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:45:01,418 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states. [2020-10-26 19:45:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:01,763 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-26 19:45:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:45:01,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-26 19:45:01,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:01,764 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:45:01,764 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:45:01,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:45:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:45:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:45:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:45:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-26 19:45:01,782 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 44 [2020-10-26 19:45:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:01,783 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-26 19:45:01,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:45:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-26 19:45:01,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:45:01,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:01,784 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:01,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:45:01,785 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:01,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1843912275, now seen corresponding path program 12 times [2020-10-26 19:45:01,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:01,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946480610] [2020-10-26 19:45:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:01,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:01,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:03,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:03,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:45:03,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:03,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1774 [2020-10-26 19:45:03,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:03,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:45:03,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:03,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:45:03,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:03,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:03,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:03,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:03,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:03,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:03,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:45:03,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:03,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:03,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:03,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:03,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:04,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:04,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:45:04,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:04,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-26 19:45:04,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:04,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:45:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:45:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:04,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946480610] [2020-10-26 19:45:04,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:04,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:45:04,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841543249] [2020-10-26 19:45:04,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:45:04,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:45:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:45:04,418 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 18 states. [2020-10-26 19:45:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:04,695 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-26 19:45:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:45:04,696 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-26 19:45:04,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:04,697 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:45:04,697 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:45:04,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:45:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:45:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:45:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:45:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-26 19:45:04,705 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 46 [2020-10-26 19:45:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:04,705 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-26 19:45:04,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:45:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-26 19:45:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:45:04,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:04,706 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:04,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:45:04,707 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:04,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2067057329, now seen corresponding path program 13 times [2020-10-26 19:45:04,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:04,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109732501] [2020-10-26 19:45:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:04,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:04,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:45:06,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:06,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1598 [2020-10-26 19:45:06,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:45:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:45:06,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:06,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:06,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:06,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:06,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:45:06,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:06,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:06,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:06,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:06,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:06,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:45:06,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:06,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-26 19:45:06,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:45:06,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:06,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:45:06,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:07,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109732501] [2020-10-26 19:45:07,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:07,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:45:07,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557043106] [2020-10-26 19:45:07,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:45:07,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:07,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:45:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:45:07,167 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 19 states. [2020-10-26 19:45:07,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:07,541 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-26 19:45:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:45:07,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-26 19:45:07,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:07,543 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:45:07,543 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:45:07,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:45:07,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:45:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:45:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:45:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-26 19:45:07,551 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 48 [2020-10-26 19:45:07,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:07,552 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-26 19:45:07,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:45:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-26 19:45:07,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:45:07,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:07,553 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:07,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:45:07,553 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:07,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1761089423, now seen corresponding path program 14 times [2020-10-26 19:45:07,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:07,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428172451] [2020-10-26 19:45:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:07,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:07,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:09,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:09,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:45:09,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:09,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1770 [2020-10-26 19:45:09,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:09,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:45:09,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:09,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:45:09,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:09,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:09,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:09,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:09,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:09,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:09,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:09,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:09,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:09,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:09,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:09,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:09,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:09,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:09,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:09,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:45:09,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:09,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-26 19:45:09,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:09,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:45:09,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:09,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:45:09,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:10,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428172451] [2020-10-26 19:45:10,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:10,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:45:10,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150818168] [2020-10-26 19:45:10,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:45:10,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:10,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:45:10,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:45:10,634 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 20 states. [2020-10-26 19:45:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:11,085 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-26 19:45:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:45:11,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-26 19:45:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:11,086 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:45:11,087 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:45:11,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:45:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:45:11,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:45:11,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:45:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-26 19:45:11,094 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-10-26 19:45:11,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:11,094 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-26 19:45:11,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:45:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-26 19:45:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:45:11,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:11,095 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:11,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:45:11,095 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:11,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:11,096 INFO L82 PathProgramCache]: Analyzing trace with hash 216292115, now seen corresponding path program 15 times [2020-10-26 19:45:11,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:11,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200763764] [2020-10-26 19:45:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:11,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:11,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:13,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:13,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:45:13,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:13,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2004 [2020-10-26 19:45:13,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:13,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:45:13,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:13,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:45:13,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:13,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:13,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:13,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:13,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:13,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:13,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:45:13,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:13,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:13,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:13,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:13,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:13,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:13,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:13,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:13,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:45:13,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:13,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-26 19:45:13,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:13,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:45:13,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:13,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:45:13,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:14,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200763764] [2020-10-26 19:45:14,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:14,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:45:14,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577906035] [2020-10-26 19:45:14,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:45:14,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:14,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:45:14,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:45:14,128 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 21 states. [2020-10-26 19:45:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:14,453 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-26 19:45:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:45:14,454 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-26 19:45:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:14,455 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:45:14,455 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:45:14,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:45:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:45:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:45:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:45:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-26 19:45:14,466 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-26 19:45:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:14,466 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-26 19:45:14,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:45:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-26 19:45:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:45:14,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:14,469 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:14,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:45:14,469 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:14,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2104405301, now seen corresponding path program 16 times [2020-10-26 19:45:14,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:14,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135067066] [2020-10-26 19:45:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:14,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:16,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:16,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:45:16,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:16,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2030 [2020-10-26 19:45:16,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:16,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:45:16,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:16,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:45:16,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:16,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:16,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:16,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:16,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:16,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:16,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:16,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:16,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:16,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:16,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:16,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:16,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:17,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:17,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:45:17,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:17,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-26 19:45:17,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:17,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:45:17,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:17,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:45:17,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:18,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135067066] [2020-10-26 19:45:18,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:18,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:45:18,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940157895] [2020-10-26 19:45:18,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:45:18,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:18,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:45:18,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:45:18,059 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 22 states. [2020-10-26 19:45:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:18,486 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-26 19:45:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:45:18,487 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-26 19:45:18,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:18,488 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:45:18,488 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:45:18,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:45:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:45:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:45:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:45:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-26 19:45:18,495 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 54 [2020-10-26 19:45:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:18,495 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-26 19:45:18,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:45:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-26 19:45:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:45:18,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:18,496 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:18,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:45:18,496 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:18,497 INFO L82 PathProgramCache]: Analyzing trace with hash -189989161, now seen corresponding path program 17 times [2020-10-26 19:45:18,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:18,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376782269] [2020-10-26 19:45:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:18,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:18,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:20,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:20,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:45:20,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:20,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2104 [2020-10-26 19:45:20,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:45:20,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:20,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:45:20,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:20,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:20,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:20,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:20,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:20,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:20,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:45:20,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:20,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:20,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:20,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:20,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:20,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:20,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:21,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:21,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:45:21,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:21,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-26 19:45:21,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:21,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:45:21,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:21,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:45:21,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:21,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376782269] [2020-10-26 19:45:21,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:21,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:45:21,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515719798] [2020-10-26 19:45:21,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:45:21,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:45:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:45:21,832 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 23 states. [2020-10-26 19:45:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:22,250 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-26 19:45:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:45:22,251 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-26 19:45:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:22,252 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:45:22,252 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:45:22,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:45:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:45:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:45:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:45:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-26 19:45:22,268 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 56 [2020-10-26 19:45:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:22,268 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-26 19:45:22,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:45:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-26 19:45:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:45:22,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:22,270 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:22,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:45:22,271 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1784844295, now seen corresponding path program 18 times [2020-10-26 19:45:22,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:22,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57354811] [2020-10-26 19:45:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:22,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:22,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:24,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:24,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:45:24,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:24,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-26 19:45:24,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:24,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:45:24,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:24,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:45:24,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:24,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:24,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:24,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:24,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:24,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:24,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:24,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:24,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:24,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:24,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:24,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:24,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:24,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:24,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:24,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:45:24,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:24,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-26 19:45:24,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:24,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:45:24,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:24,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:45:24,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:25,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57354811] [2020-10-26 19:45:25,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:25,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:45:25,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097978932] [2020-10-26 19:45:25,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:45:25,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:25,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:45:25,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:45:25,255 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 24 states. [2020-10-26 19:45:25,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:25,683 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-26 19:45:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:45:25,684 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-26 19:45:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:25,685 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:45:25,685 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:45:25,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:45:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:45:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:45:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:45:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-26 19:45:25,692 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2020-10-26 19:45:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:25,692 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-26 19:45:25,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:45:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-26 19:45:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:45:25,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:25,693 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:25,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:45:25,694 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:25,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1137303397, now seen corresponding path program 19 times [2020-10-26 19:45:25,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:25,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005286839] [2020-10-26 19:45:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:25,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:25,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:27,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:27,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:45:27,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:27,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2199 [2020-10-26 19:45:27,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:27,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:45:27,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:27,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:45:27,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:27,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:27,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:27,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:27,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:27,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:27,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:27,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:27,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:27,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:28,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:28,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:28,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:45:28,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:28,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-26 19:45:28,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:28,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:45:28,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:28,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:45:28,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:29,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005286839] [2020-10-26 19:45:29,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:29,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:45:29,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995345788] [2020-10-26 19:45:29,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:45:29,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:29,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:45:29,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:45:29,079 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 25 states. [2020-10-26 19:45:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:29,482 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-26 19:45:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:45:29,482 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-26 19:45:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:29,483 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:45:29,483 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:45:29,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:45:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:45:29,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:45:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:45:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-26 19:45:29,491 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 60 [2020-10-26 19:45:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:29,491 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-26 19:45:29,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:45:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-26 19:45:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:45:29,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:29,492 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:29,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:45:29,493 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:29,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1620758339, now seen corresponding path program 20 times [2020-10-26 19:45:29,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:29,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871344986] [2020-10-26 19:45:29,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:29,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:29,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:31,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:31,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:45:31,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:31,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2287 [2020-10-26 19:45:31,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:31,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:45:31,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:31,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:45:31,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:31,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:31,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:31,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:31,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:31,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:31,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:45:31,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:31,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:31,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:32,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:32,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:45:32,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:32,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-26 19:45:32,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:32,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:45:32,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:45:32,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:33,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871344986] [2020-10-26 19:45:33,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:33,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:45:33,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424163854] [2020-10-26 19:45:33,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:45:33,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:45:33,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:45:33,094 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 26 states. [2020-10-26 19:45:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:33,390 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-26 19:45:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:45:33,394 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-10-26 19:45:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:33,395 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:45:33,395 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:45:33,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:45:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:45:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:45:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:45:33,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-26 19:45:33,401 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2020-10-26 19:45:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:33,401 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-26 19:45:33,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:45:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-26 19:45:33,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:45:33,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:33,402 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:33,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:45:33,403 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:33,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1930477663, now seen corresponding path program 21 times [2020-10-26 19:45:33,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:33,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894051590] [2020-10-26 19:45:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:33,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:35,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:35,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:45:35,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:35,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2521 [2020-10-26 19:45:35,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:35,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:45:35,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:35,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:45:35,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:35,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:35,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:35,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:35,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:35,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:35,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:35,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:35,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:36,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:36,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:36,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:36,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:45:36,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:36,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-26 19:45:36,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:36,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:45:36,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:36,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:45:36,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:37,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894051590] [2020-10-26 19:45:37,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:37,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:45:37,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365105131] [2020-10-26 19:45:37,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:45:37,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:45:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:45:37,972 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 27 states. [2020-10-26 19:45:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:38,492 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-26 19:45:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:45:38,493 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-26 19:45:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:38,494 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:45:38,494 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:45:38,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:45:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:45:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:45:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:45:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-26 19:45:38,500 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 64 [2020-10-26 19:45:38,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:38,500 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-26 19:45:38,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:45:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-26 19:45:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:45:38,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:38,501 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:38,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:45:38,501 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash 169275265, now seen corresponding path program 22 times [2020-10-26 19:45:38,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:38,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834721741] [2020-10-26 19:45:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:38,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:38,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:41,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:41,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:45:41,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:41,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2973 [2020-10-26 19:45:41,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:45:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:45:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:41,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:41,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:41,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:41,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:41,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:45:41,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:41,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:41,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:42,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:42,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:45:42,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:42,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-26 19:45:42,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:45:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:45:42,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:42,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834721741] [2020-10-26 19:45:42,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:42,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:45:42,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924854563] [2020-10-26 19:45:42,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:45:42,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:42,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:45:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:45:42,934 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 28 states. [2020-10-26 19:45:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:43,452 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-26 19:45:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:45:43,452 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-26 19:45:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:43,453 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:45:43,453 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:45:43,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=588, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:45:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:45:43,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:45:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:45:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-26 19:45:43,464 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 66 [2020-10-26 19:45:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:43,464 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-26 19:45:43,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:45:43,464 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-26 19:45:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:45:43,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:43,466 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:43,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:45:43,468 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash -129114589, now seen corresponding path program 23 times [2020-10-26 19:45:43,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:43,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922530951] [2020-10-26 19:45:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:43,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:43,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:46,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:46,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:45:46,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:46,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3209 [2020-10-26 19:45:46,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:46,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:45:46,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:46,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:45:46,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:46,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:46,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:46,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:46,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:46,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:46,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:46,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:46,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:46,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:46,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:46,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:46,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:46,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:47,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:47,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:45:47,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:47,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-10-26 19:45:47,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:47,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:45:47,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:47,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:45:47,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:48,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922530951] [2020-10-26 19:45:48,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:48,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:45:48,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777785757] [2020-10-26 19:45:48,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:45:48,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:48,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:45:48,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:45:48,334 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 29 states. [2020-10-26 19:45:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:48,869 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-26 19:45:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:45:48,869 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2020-10-26 19:45:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:48,871 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:45:48,871 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:45:48,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=624, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:45:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:45:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:45:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:45:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-26 19:45:48,878 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 68 [2020-10-26 19:45:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:48,878 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-26 19:45:48,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:45:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-26 19:45:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:45:48,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:48,879 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:48,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:45:48,880 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:48,880 INFO L82 PathProgramCache]: Analyzing trace with hash 881044549, now seen corresponding path program 24 times [2020-10-26 19:45:48,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:48,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248847398] [2020-10-26 19:45:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:48,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:48,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:52,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:52,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:45:52,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:52,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3257 [2020-10-26 19:45:52,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:52,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:45:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:45:52,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:52,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:52,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:52,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:52,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:52,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:52,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:52,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:52,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:52,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:52,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:53,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:53,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:45:53,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:53,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-10-26 19:45:53,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:53,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:45:53,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:53,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:45:53,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:53,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248847398] [2020-10-26 19:45:53,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:53,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:45:53,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507663696] [2020-10-26 19:45:53,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:45:53,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:53,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:45:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:45:53,996 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 30 states. [2020-10-26 19:45:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:54,544 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-26 19:45:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:45:54,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-10-26 19:45:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:54,547 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:45:54,548 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:45:54,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:45:54,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:45:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:45:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:45:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-26 19:45:54,556 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 70 [2020-10-26 19:45:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:54,557 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-26 19:45:54,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:45:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-26 19:45:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:45:54,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:54,558 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:54,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:45:54,558 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:54,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:54,558 INFO L82 PathProgramCache]: Analyzing trace with hash 981367271, now seen corresponding path program 25 times [2020-10-26 19:45:54,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:54,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328951130] [2020-10-26 19:45:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:54,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:54,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:58,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:58,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:45:58,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:58,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3777 [2020-10-26 19:45:58,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:58,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:45:58,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:45:58,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:45:58,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:58,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:58,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:58,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:58,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:58,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:58,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:58,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:58,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:58,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:58,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:45:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:58,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:59,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:59,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:45:59,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:59,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-26 19:45:59,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:45:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:45:59,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:01,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328951130] [2020-10-26 19:46:01,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:01,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:46:01,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851527565] [2020-10-26 19:46:01,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:46:01,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:01,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:46:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:46:01,188 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 31 states. [2020-10-26 19:46:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:01,798 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-10-26 19:46:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:46:01,799 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-10-26 19:46:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:01,800 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:46:01,800 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:46:01,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=448, Invalid=674, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:46:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:46:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:46:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:46:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-26 19:46:01,807 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 72 [2020-10-26 19:46:01,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:01,808 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-26 19:46:01,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:46:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-26 19:46:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:46:01,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:01,809 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:01,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:46:01,809 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:01,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1392744695, now seen corresponding path program 26 times [2020-10-26 19:46:01,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:01,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268644235] [2020-10-26 19:46:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:01,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:01,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:05,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:05,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:46:05,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:05,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3996 [2020-10-26 19:46:05,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:05,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:46:05,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:46:05,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:46:05,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:05,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:05,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:05,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:05,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:05,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:05,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:05,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:05,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:05,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:46:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:05,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:07,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:07,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:46:07,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:07,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1100 [2020-10-26 19:46:07,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:46:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:46:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:46:07,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:07,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268644235] [2020-10-26 19:46:07,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:07,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:46:07,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000585559] [2020-10-26 19:46:07,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:46:07,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:07,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:46:07,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:46:07,805 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 32 states. [2020-10-26 19:46:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:08,342 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-10-26 19:46:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:46:08,343 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2020-10-26 19:46:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:08,344 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:46:08,344 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:46:08,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=452, Invalid=738, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:46:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:46:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:46:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:46:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-26 19:46:08,351 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 74 [2020-10-26 19:46:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:08,352 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-26 19:46:08,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:46:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-26 19:46:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:46:08,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:08,353 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:08,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:46:08,353 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:08,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2008257451, now seen corresponding path program 27 times [2020-10-26 19:46:08,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:08,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173856204] [2020-10-26 19:46:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:08,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:08,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:13,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:13,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:46:13,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:13,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:46:13,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:13,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:46:13,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:46:13,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:46:13,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:13,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:13,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:13,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:13,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:13,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:13,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:13,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:13,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:13,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:13,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:13,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:13,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:46:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:13,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:14,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:46:14,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:14,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-26 19:46:14,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:46:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:46:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:46:14,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:16,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173856204] [2020-10-26 19:46:16,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:16,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:46:16,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396427368] [2020-10-26 19:46:16,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:46:16,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:16,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:46:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:46:16,788 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 33 states. [2020-10-26 19:46:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:17,454 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2020-10-26 19:46:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:46:17,455 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2020-10-26 19:46:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:17,456 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:46:17,456 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:46:17,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=509, Invalid=751, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:46:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:46:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:46:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:46:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-26 19:46:17,470 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2020-10-26 19:46:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:17,470 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-26 19:46:17,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:46:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-26 19:46:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:46:17,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:17,472 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:17,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:46:17,472 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:17,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1901207501, now seen corresponding path program 28 times [2020-10-26 19:46:17,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:17,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801643574] [2020-10-26 19:46:17,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:17,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:17,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:22,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:22,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:46:22,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:22,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4917 [2020-10-26 19:46:22,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:46:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:46:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:46:22,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:22,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:22,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:22,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:22,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:22,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:22,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:22,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:22,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:22,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:46:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:22,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:23,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:23,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:46:23,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:23,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1361 [2020-10-26 19:46:23,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:46:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:46:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:46:23,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:24,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801643574] [2020-10-26 19:46:24,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:24,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:46:24,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810010140] [2020-10-26 19:46:24,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:46:24,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:24,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:46:24,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:46:24,866 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 34 states. [2020-10-26 19:46:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:25,504 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-10-26 19:46:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:46:25,505 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2020-10-26 19:46:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:25,506 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:46:25,506 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:46:25,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:46:25,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:46:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:46:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:46:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-26 19:46:25,513 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 78 [2020-10-26 19:46:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:25,514 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-26 19:46:25,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:46:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-26 19:46:25,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:46:25,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:25,515 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:25,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:46:25,515 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:25,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:25,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2105420655, now seen corresponding path program 29 times [2020-10-26 19:46:25,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:25,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61253979] [2020-10-26 19:46:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:25,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:30,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:30,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:46:30,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:30,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:46:30,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:30,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:46:30,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:46:30,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:46:30,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:30,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:30,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:30,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:30,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:30,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:30,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:30,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:30,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:30,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:30,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:30,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:30,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:46:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:30,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:32,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:32,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:46:32,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:32,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1579 [2020-10-26 19:46:32,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:32,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:46:32,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:46:32,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:46:32,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:33,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61253979] [2020-10-26 19:46:33,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:33,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:46:33,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125774493] [2020-10-26 19:46:33,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:46:33,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:33,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:46:33,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:46:33,278 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 35 states. [2020-10-26 19:46:33,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:33,954 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-26 19:46:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:46:33,955 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2020-10-26 19:46:33,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:33,956 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:46:33,956 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:46:33,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:46:33,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:46:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:46:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:46:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-26 19:46:33,962 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 80 [2020-10-26 19:46:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:33,962 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-26 19:46:33,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:46:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-26 19:46:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:46:33,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:33,963 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:33,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:46:33,964 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:33,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:33,964 INFO L82 PathProgramCache]: Analyzing trace with hash 785766033, now seen corresponding path program 30 times [2020-10-26 19:46:33,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:33,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972944016] [2020-10-26 19:46:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:34,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:34,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:39,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:39,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:46:39,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:39,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:46:39,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:46:39,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:46:39,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:46:39,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:39,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:39,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:39,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:39,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:39,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:39,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:39,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:39,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:39,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:46:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:39,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:40,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:40,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:46:40,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:40,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1686 [2020-10-26 19:46:40,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:40,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:46:40,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:46:40,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:46:40,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:41,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972944016] [2020-10-26 19:46:41,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:41,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:46:41,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792506340] [2020-10-26 19:46:41,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:46:41,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:41,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:46:41,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:46:41,892 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 36 states. [2020-10-26 19:46:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:42,571 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-26 19:46:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:46:42,572 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2020-10-26 19:46:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:42,573 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:46:42,573 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:46:42,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=578, Invalid=904, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:46:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:46:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:46:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:46:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-26 19:46:42,582 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 82 [2020-10-26 19:46:42,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:42,582 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-26 19:46:42,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:46:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-26 19:46:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:46:42,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:42,583 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:42,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:46:42,584 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:42,584 INFO L82 PathProgramCache]: Analyzing trace with hash -386973389, now seen corresponding path program 31 times [2020-10-26 19:46:42,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:42,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801430932] [2020-10-26 19:46:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:42,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:42,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:47,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:47,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:46:47,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:47,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:46:47,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:47,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:46:47,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:46:47,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:46:47,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:47,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:47,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:47,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:47,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:47,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:47,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:47,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:47,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:47,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:47,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:47,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:47,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:46:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:47,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:49,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:49,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:46:49,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:49,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1755 [2020-10-26 19:46:49,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:49,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:46:49,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:46:49,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:46:49,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:50,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801430932] [2020-10-26 19:46:50,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:50,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:46:50,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149514384] [2020-10-26 19:46:50,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:46:50,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:46:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:46:50,640 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 37 states. [2020-10-26 19:46:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:51,202 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-26 19:46:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:46:51,203 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2020-10-26 19:46:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:51,204 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:46:51,204 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:46:51,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=612, Invalid=948, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:46:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:46:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:46:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:46:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-26 19:46:51,213 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2020-10-26 19:46:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:51,213 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-26 19:46:51,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:46:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-26 19:46:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:46:51,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:51,215 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:51,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:46:51,215 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:51,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2108126379, now seen corresponding path program 32 times [2020-10-26 19:46:51,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:51,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534545632] [2020-10-26 19:46:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:51,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:51,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:56,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:56,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:46:56,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:56,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:46:56,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:56,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:46:56,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:46:56,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:46:56,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:56,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:56,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:56,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:56,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:56,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:46:56,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:56,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:56,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:56,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:56,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:56,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:46:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:56,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:58,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:58,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:46:58,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:58,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1923 [2020-10-26 19:46:58,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:58,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:46:58,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:46:58,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:46:58,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:59,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534545632] [2020-10-26 19:46:59,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:59,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:46:59,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703769430] [2020-10-26 19:46:59,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:46:59,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:59,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:46:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:46:59,620 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 38 states. [2020-10-26 19:47:00,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:00,332 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-26 19:47:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:47:00,332 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2020-10-26 19:47:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:00,334 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:47:00,334 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:47:00,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=647, Invalid=993, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:47:00,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:47:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:47:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:47:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-26 19:47:00,351 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 86 [2020-10-26 19:47:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:00,351 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-26 19:47:00,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:47:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-26 19:47:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:47:00,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:00,353 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:00,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:47:00,353 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:00,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1721226487, now seen corresponding path program 33 times [2020-10-26 19:47:00,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:00,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892503884] [2020-10-26 19:47:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:00,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:00,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:05,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:05,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:47:05,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:05,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:47:05,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:47:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:47:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:47:05,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:05,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:05,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:05,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:05,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:05,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:05,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:47:05,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:05,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:05,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:05,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:05,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:05,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:47:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:05,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:07,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:07,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:47:07,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:07,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2089 [2020-10-26 19:47:07,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:07,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:47:07,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:47:07,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:47:07,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:10,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892503884] [2020-10-26 19:47:10,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:10,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:47:10,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47600823] [2020-10-26 19:47:10,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:47:10,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:47:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:47:10,397 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 39 states. [2020-10-26 19:47:11,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:11,168 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-10-26 19:47:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:47:11,169 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2020-10-26 19:47:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:11,172 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:47:11,172 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:47:11,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=716, Invalid=1006, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:47:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:47:11,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:47:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:47:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-26 19:47:11,180 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 88 [2020-10-26 19:47:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:11,180 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-26 19:47:11,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:47:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-26 19:47:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:47:11,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:11,181 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:11,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:47:11,182 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:11,182 INFO L82 PathProgramCache]: Analyzing trace with hash 942358041, now seen corresponding path program 34 times [2020-10-26 19:47:11,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:11,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931306807] [2020-10-26 19:47:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:11,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:11,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:16,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:16,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:47:16,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:16,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:47:16,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:16,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:47:16,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:47:16,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:47:16,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:16,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:16,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:16,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:16,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:16,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:16,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:47:16,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:16,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:16,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:16,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:16,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:16,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:47:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:16,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:18,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:18,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:47:18,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:18,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2264 [2020-10-26 19:47:18,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:18,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:47:18,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:47:18,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:47:18,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:20,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931306807] [2020-10-26 19:47:20,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:20,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:47:20,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945297462] [2020-10-26 19:47:20,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:47:20,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:47:20,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:47:20,061 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 40 states. [2020-10-26 19:47:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:20,683 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-26 19:47:20,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:47:20,683 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2020-10-26 19:47:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:20,685 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:47:20,686 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:47:20,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=720, Invalid=1086, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:47:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:47:20,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:47:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:47:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-26 19:47:20,694 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 90 [2020-10-26 19:47:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:20,694 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-26 19:47:20,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:47:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-26 19:47:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:47:20,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:20,695 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:20,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:47:20,696 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:20,696 INFO L82 PathProgramCache]: Analyzing trace with hash -225909061, now seen corresponding path program 35 times [2020-10-26 19:47:20,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:20,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670218830] [2020-10-26 19:47:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:20,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:20,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:25,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:25,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:47:25,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:25,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-26 19:47:25,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:25,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:47:25,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:47:25,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:47:25,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:25,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:25,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:25,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:25,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:25,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:25,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:47:25,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:25,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:25,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:25,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:25,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:25,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:47:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:25,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:28,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:28,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:47:28,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:28,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2350 [2020-10-26 19:47:28,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:28,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:47:28,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:47:28,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:47:28,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:31,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670218830] [2020-10-26 19:47:31,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:31,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:47:31,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187952925] [2020-10-26 19:47:31,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:47:31,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:31,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:47:31,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:47:31,261 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 41 states. [2020-10-26 19:47:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:31,920 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-26 19:47:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:47:31,921 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2020-10-26 19:47:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:31,922 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:47:31,922 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:47:31,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:47:31,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:47:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:47:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:47:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-26 19:47:31,932 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-26 19:47:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:31,933 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-26 19:47:31,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:47:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-26 19:47:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:47:31,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:31,934 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:31,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:47:31,934 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:31,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1944129827, now seen corresponding path program 36 times [2020-10-26 19:47:31,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:31,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931215311] [2020-10-26 19:47:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:32,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:32,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:36,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:36,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:47:36,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:36,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:47:36,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:47:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:47:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:47:36,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:37,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:37,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:37,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:37,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:37,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:37,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:47:37,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:37,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:37,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:37,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:37,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:37,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:47:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:37,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:39,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:39,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:47:39,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:39,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2601 [2020-10-26 19:47:39,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:47:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:47:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:47:39,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:41,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931215311] [2020-10-26 19:47:41,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:41,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:47:41,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359341443] [2020-10-26 19:47:41,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:47:41,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:41,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:47:41,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:47:41,223 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 42 states. [2020-10-26 19:47:41,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:41,922 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-26 19:47:41,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:47:41,923 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2020-10-26 19:47:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:41,925 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:47:41,925 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:47:41,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=797, Invalid=1183, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:47:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:47:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:47:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:47:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-26 19:47:41,935 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 94 [2020-10-26 19:47:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:41,935 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-26 19:47:41,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:47:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-26 19:47:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:47:41,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:41,936 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:41,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:47:41,936 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash 408123007, now seen corresponding path program 37 times [2020-10-26 19:47:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:41,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583649235] [2020-10-26 19:47:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:41,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:42,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:47,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:47,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:47:47,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:47,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:47:47,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:47:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:47:47,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:47:47,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:47,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:47,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:47,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:47,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:47,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:47,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:47:47,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:47,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:47,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:47:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:47,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:50,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:47:50,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3072 [2020-10-26 19:47:50,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:47:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:47:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:47:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:51,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583649235] [2020-10-26 19:47:51,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:51,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:47:51,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699371366] [2020-10-26 19:47:51,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:47:51,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:47:51,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:47:51,818 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 43 states. [2020-10-26 19:47:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:52,650 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-10-26 19:47:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:47:52,651 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2020-10-26 19:47:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:52,653 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:47:52,653 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:47:52,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=837, Invalid=1233, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:47:52,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:47:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:47:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:47:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-26 19:47:52,662 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 96 [2020-10-26 19:47:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:52,663 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-26 19:47:52,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:47:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-26 19:47:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:47:52,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:52,664 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:52,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:47:52,664 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1770298785, now seen corresponding path program 38 times [2020-10-26 19:47:52,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:52,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061375] [2020-10-26 19:47:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:52,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:52,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:57,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:57,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:47:57,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:57,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:47:57,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:47:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:47:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:47:57,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:57,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:57,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:57,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:57,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:57,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:47:57,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:57,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:57,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:47:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:57,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:00,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:00,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:48:00,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:00,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3054 [2020-10-26 19:48:00,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:00,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:48:00,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:00,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:48:00,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:02,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061375] [2020-10-26 19:48:02,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:02,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:48:02,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320111437] [2020-10-26 19:48:02,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:48:02,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:02,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:48:02,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:48:02,635 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 44 states. [2020-10-26 19:48:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:03,138 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-10-26 19:48:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:48:03,138 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2020-10-26 19:48:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:03,140 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:48:03,140 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:48:03,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=878, Invalid=1284, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:48:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:48:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:48:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:48:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-26 19:48:03,149 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 98 [2020-10-26 19:48:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:03,150 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-26 19:48:03,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:48:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-26 19:48:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:48:03,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:03,151 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:03,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:48:03,151 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:03,151 INFO L82 PathProgramCache]: Analyzing trace with hash 856196163, now seen corresponding path program 39 times [2020-10-26 19:48:03,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:03,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019948625] [2020-10-26 19:48:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:03,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:03,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:08,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:08,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:48:08,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:08,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:48:08,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:48:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:48:08,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:08,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:08,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:08,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:08,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:08,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:08,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:08,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:08,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:08,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:08,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:08,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:08,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:08,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:11,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:11,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:48:11,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:11,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3265 [2020-10-26 19:48:11,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:48:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:48:11,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:13,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019948625] [2020-10-26 19:48:13,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:13,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:48:13,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781732260] [2020-10-26 19:48:13,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:48:13,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:13,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:48:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:48:13,429 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 45 states. [2020-10-26 19:48:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:14,263 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-26 19:48:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:48:14,264 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2020-10-26 19:48:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:14,265 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:48:14,266 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:48:14,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=920, Invalid=1336, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:48:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:48:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:48:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:48:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-26 19:48:14,272 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 100 [2020-10-26 19:48:14,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:14,273 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-26 19:48:14,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:48:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-26 19:48:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:48:14,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:14,274 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:14,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:48:14,274 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:14,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1423095195, now seen corresponding path program 40 times [2020-10-26 19:48:14,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:14,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653948862] [2020-10-26 19:48:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:14,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:14,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:19,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:19,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:48:19,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:19,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:48:19,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:19,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:48:19,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:19,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:48:19,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:19,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:19,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:19,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:19,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:19,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:19,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:19,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:19,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:19,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:19,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:22,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:22,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:48:22,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:22,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3020 [2020-10-26 19:48:22,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:22,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:48:22,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:22,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:48:22,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:24,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653948862] [2020-10-26 19:48:24,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:24,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:48:24,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551395973] [2020-10-26 19:48:24,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:48:24,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:24,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:48:24,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:48:24,271 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 46 states. [2020-10-26 19:48:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:24,915 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-10-26 19:48:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:48:24,916 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2020-10-26 19:48:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:24,917 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:48:24,917 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:48:24,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=963, Invalid=1389, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:48:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:48:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:48:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:48:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-26 19:48:24,923 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 102 [2020-10-26 19:48:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:24,923 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-26 19:48:24,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:48:24,924 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-26 19:48:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:48:24,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:24,924 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:24,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:48:24,924 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:24,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1388769273, now seen corresponding path program 41 times [2020-10-26 19:48:24,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:24,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990641033] [2020-10-26 19:48:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:25,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:29,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:29,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:48:29,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:29,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:48:29,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:48:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:48:29,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:30,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:30,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:30,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:30,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:30,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:30,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:48:30,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:30,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:30,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:30,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:30,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:30,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:30,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking...