/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=DEEPEST --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/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:49:36,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:49:36,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:49:36,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:49:36,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:49:36,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:49:36,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:49:36,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:49:36,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:49:36,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:49:36,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:49:36,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:49:36,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:49:36,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:49:36,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:49:36,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:49:36,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:49:36,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:49:36,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:49:36,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:49:36,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:49:36,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:49:36,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:49:36,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:49:36,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:49:36,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:49:36,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:49:36,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:49:36,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:49:36,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:49:36,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:49:36,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:49:36,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:49:36,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:49:36,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:49:36,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:49:36,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:49:36,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:49:36,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:49:36,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:49:36,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:49:36,571 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 [2020-10-27 23:49:36,623 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:49:36,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:49:36,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:49:36,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:49:36,630 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:49:36,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:49:36,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:49:36,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:49:36,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:49:36,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:49:36,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:49:36,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:49:36,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:49:36,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:49:36,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:49:36,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:49:36,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:49:36,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:49:36,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:49:36,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:49:36,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:49:36,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:49:36,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:49:36,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:49:36,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:49:36,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:49:36,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:49:36,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:49:36,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:49:36,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:49:37,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:49:37,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:49:37,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:49:37,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:49:37,110 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:49:37,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-27 23:49:37,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c871d907d/023e311a8ba547a482f21e092ca20d3f/FLAG6e3fcafb9 [2020-10-27 23:49:37,923 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:49:37,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-27 23:49:37,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c871d907d/023e311a8ba547a482f21e092ca20d3f/FLAG6e3fcafb9 [2020-10-27 23:49:38,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c871d907d/023e311a8ba547a482f21e092ca20d3f [2020-10-27 23:49:38,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:49:38,134 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:49:38,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:49:38,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:49:38,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:49:38,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:49:38" (1/1) ... [2020-10-27 23:49:38,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4a2634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38, skipping insertion in model container [2020-10-27 23:49:38,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:49:38" (1/1) ... [2020-10-27 23:49:38,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:49:38,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:49:38,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:49:38,721 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:49:38,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:49:38,968 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:49:38,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38 WrapperNode [2020-10-27 23:49:38,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:49:38,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:49:38,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:49:38,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:49:38,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38" (1/1) ... [2020-10-27 23:49:38,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38" (1/1) ... [2020-10-27 23:49:39,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38" (1/1) ... [2020-10-27 23:49:39,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38" (1/1) ... [2020-10-27 23:49:39,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38" (1/1) ... [2020-10-27 23:49:39,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38" (1/1) ... [2020-10-27 23:49:39,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38" (1/1) ... [2020-10-27 23:49:39,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:49:39,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:49:39,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:49:39,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:49:39,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38" (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 [2020-10-27 23:49:39,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:49:39,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:49:39,256 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:49:39,256 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:49:39,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:49:39,257 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:49:39,257 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:49:39,257 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:49:39,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:49:39,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:49:39,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:49:39,258 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:49:39,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:49:39,258 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:49:39,258 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:49:39,258 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:49:39,258 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:49:39,259 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:49:39,259 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:49:39,259 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:49:39,259 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:49:39,259 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:49:39,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:49:39,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:49:39,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:49:39,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:49:39,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:49:39,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:49:39,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:49:40,842 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:49:40,843 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:49:40,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:49:40 BoogieIcfgContainer [2020-10-27 23:49:40,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:49:40,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:49:40,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:49:40,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:49:40,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:49:38" (1/3) ... [2020-10-27 23:49:40,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d07f7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:49:40, skipping insertion in model container [2020-10-27 23:49:40,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:49:38" (2/3) ... [2020-10-27 23:49:40,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d07f7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:49:40, skipping insertion in model container [2020-10-27 23:49:40,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:49:40" (3/3) ... [2020-10-27 23:49:40,876 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-27 23:49:40,891 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:49:40,903 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:49:40,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:49:40,964 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:49:40,964 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:49:40,964 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:49:40,964 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:49:40,965 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:49:40,965 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:49:40,965 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:49:40,965 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:49:41,008 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states. [2020-10-27 23:49:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 23:49:41,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:41,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:49:41,044 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:41,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1230233939, now seen corresponding path program 1 times [2020-10-27 23:49:41,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:41,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246135442] [2020-10-27 23:49:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:41,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:41,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:42,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:42,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:42,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:42,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:42,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:42,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:43,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:44,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:44,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:46,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:46,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-27 23:49:46,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:49:46,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:49:46,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:46,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:49:46,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-27 23:49:46,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:49:46,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:49:46,921 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:49:46,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:46,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:46,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:46,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:46,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 23:49:46,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:46,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:49:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:47,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246135442] [2020-10-27 23:49:47,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:47,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:49:47,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934669] [2020-10-27 23:49:47,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:49:47,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:47,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:49:47,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:49:47,136 INFO L87 Difference]: Start difference. First operand 340 states. Second operand 5 states. [2020-10-27 23:49:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:48,977 INFO L93 Difference]: Finished difference Result 526 states and 854 transitions. [2020-10-27 23:49:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:49:48,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-27 23:49:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:48,994 INFO L225 Difference]: With dead ends: 526 [2020-10-27 23:49:48,994 INFO L226 Difference]: Without dead ends: 333 [2020-10-27 23:49:48,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:49:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-27 23:49:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2020-10-27 23:49:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-27 23:49:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 536 transitions. [2020-10-27 23:49:49,100 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 536 transitions. Word has length 132 [2020-10-27 23:49:49,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:49,101 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 536 transitions. [2020-10-27 23:49:49,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:49:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 536 transitions. [2020-10-27 23:49:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 23:49:49,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:49,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:49:49,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:49:49,110 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:49,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1954384944, now seen corresponding path program 1 times [2020-10-27 23:49:49,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:49,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216351420] [2020-10-27 23:49:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:49,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:49,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:49,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:49,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:49,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:49,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:49,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:49,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:50,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:50,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:51,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:54,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:54,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 23:49:54,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:49:54,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:49:54,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:49:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 23:49:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 23:49:54,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:54,529 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:49:54,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:54,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:54,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:54,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:54,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:49:54,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:54,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:49:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:54,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216351420] [2020-10-27 23:49:54,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:54,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:49:54,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838942338] [2020-10-27 23:49:54,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:49:54,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:54,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:49:54,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:49:54,612 INFO L87 Difference]: Start difference. First operand 333 states and 536 transitions. Second operand 4 states. [2020-10-27 23:49:57,782 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 23:49:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:57,785 INFO L93 Difference]: Finished difference Result 786 states and 1246 transitions. [2020-10-27 23:49:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:49:57,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-10-27 23:49:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:57,798 INFO L225 Difference]: With dead ends: 786 [2020-10-27 23:49:57,798 INFO L226 Difference]: Without dead ends: 548 [2020-10-27 23:49:57,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:49:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-27 23:49:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 545. [2020-10-27 23:49:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-10-27 23:49:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 860 transitions. [2020-10-27 23:49:57,883 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 860 transitions. Word has length 134 [2020-10-27 23:49:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:57,884 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 860 transitions. [2020-10-27 23:49:57,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:49:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 860 transitions. [2020-10-27 23:49:57,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 23:49:57,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:57,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:49:57,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:49:57,888 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash -727931376, now seen corresponding path program 1 times [2020-10-27 23:49:57,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:57,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14375725] [2020-10-27 23:49:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:57,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:57,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:59,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:00,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:02,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:02,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 23:50:02,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:50:02,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:50:02,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:02,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:50:02,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 23:50:02,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:50:02,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:03,308 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:50:03,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:03,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:03,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:03,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:03,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:03,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:50:03,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:03,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:03,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:03,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:03,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14375725] [2020-10-27 23:50:03,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:03,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:50:03,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738883146] [2020-10-27 23:50:03,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:50:03,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:03,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:50:03,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:50:03,407 INFO L87 Difference]: Start difference. First operand 545 states and 860 transitions. Second operand 4 states. [2020-10-27 23:50:03,809 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:50:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:05,564 INFO L93 Difference]: Finished difference Result 1386 states and 2165 transitions. [2020-10-27 23:50:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:50:05,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-10-27 23:50:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:05,572 INFO L225 Difference]: With dead ends: 1386 [2020-10-27 23:50:05,572 INFO L226 Difference]: Without dead ends: 989 [2020-10-27 23:50:05,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2020-10-27 23:50:05,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 954. [2020-10-27 23:50:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2020-10-27 23:50:05,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1488 transitions. [2020-10-27 23:50:05,632 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1488 transitions. Word has length 135 [2020-10-27 23:50:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:05,632 INFO L481 AbstractCegarLoop]: Abstraction has 954 states and 1488 transitions. [2020-10-27 23:50:05,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:50:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1488 transitions. [2020-10-27 23:50:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 23:50:05,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:05,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:50:05,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:50:05,637 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:05,638 INFO L82 PathProgramCache]: Analyzing trace with hash -310714109, now seen corresponding path program 1 times [2020-10-27 23:50:05,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:05,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893718394] [2020-10-27 23:50:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:05,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:05,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:05,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:05,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:05,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:05,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:06,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:06,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:06,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:06,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:07,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:07,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:10,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:10,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 23:50:10,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:50:10,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-27 23:50:10,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:10,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:50:10,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 23:50:10,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:50:10,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:11,070 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:50:11,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:11,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:11,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:11,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:11,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:11,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:50:11,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:11,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:11,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893718394] [2020-10-27 23:50:11,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:11,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:50:11,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209476242] [2020-10-27 23:50:11,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:50:11,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:50:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:50:11,161 INFO L87 Difference]: Start difference. First operand 954 states and 1488 transitions. Second operand 4 states. [2020-10-27 23:50:11,498 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:50:14,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:14,080 INFO L93 Difference]: Finished difference Result 2484 states and 3852 transitions. [2020-10-27 23:50:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:50:14,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-10-27 23:50:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:14,090 INFO L225 Difference]: With dead ends: 2484 [2020-10-27 23:50:14,091 INFO L226 Difference]: Without dead ends: 1649 [2020-10-27 23:50:14,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-10-27 23:50:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1644. [2020-10-27 23:50:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1644 states. [2020-10-27 23:50:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2534 transitions. [2020-10-27 23:50:14,192 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2534 transitions. Word has length 137 [2020-10-27 23:50:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:14,193 INFO L481 AbstractCegarLoop]: Abstraction has 1644 states and 2534 transitions. [2020-10-27 23:50:14,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:50:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2534 transitions. [2020-10-27 23:50:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 23:50:14,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:14,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:50:14,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:50:14,200 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:14,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:14,200 INFO L82 PathProgramCache]: Analyzing trace with hash -144384123, now seen corresponding path program 1 times [2020-10-27 23:50:14,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:14,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524546973] [2020-10-27 23:50:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:14,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:14,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:14,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:14,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:14,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:14,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:14,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:14,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:14,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:15,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:16,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:16,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:19,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:19,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 23:50:19,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:50:19,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:50:19,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:50:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-27 23:50:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:50:19,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:19,568 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:50:19,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:19,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:19,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:19,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:19,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:19,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:50:19,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:19,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:19,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524546973] [2020-10-27 23:50:19,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:19,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:50:19,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214101114] [2020-10-27 23:50:19,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:50:19,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:19,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:50:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:50:19,630 INFO L87 Difference]: Start difference. First operand 1644 states and 2534 transitions. Second operand 4 states. [2020-10-27 23:50:19,964 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:50:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:22,404 INFO L93 Difference]: Finished difference Result 2976 states and 4582 transitions. [2020-10-27 23:50:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:50:22,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-10-27 23:50:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:22,417 INFO L225 Difference]: With dead ends: 2976 [2020-10-27 23:50:22,417 INFO L226 Difference]: Without dead ends: 2337 [2020-10-27 23:50:22,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:22,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2020-10-27 23:50:22,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2176. [2020-10-27 23:50:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2176 states. [2020-10-27 23:50:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 3346 transitions. [2020-10-27 23:50:22,532 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 3346 transitions. Word has length 137 [2020-10-27 23:50:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:22,533 INFO L481 AbstractCegarLoop]: Abstraction has 2176 states and 3346 transitions. [2020-10-27 23:50:22,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:50:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 3346 transitions. [2020-10-27 23:50:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 23:50:22,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:22,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:50:22,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:50:22,540 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash -638438192, now seen corresponding path program 1 times [2020-10-27 23:50:22,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:22,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991046913] [2020-10-27 23:50:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:22,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:22,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:22,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:22,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:22,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:22,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:22,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:22,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:22,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:22,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:23,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:26,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:26,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:27,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:27,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 23:50:27,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:50:27,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:50:27,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:50:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 23:50:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:50:27,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:27,925 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:50:27,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:27,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:27,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:27,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:27,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:27,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:50:27,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:27,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:27,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:27,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:27,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:27,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991046913] [2020-10-27 23:50:27,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:27,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:50:27,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205347923] [2020-10-27 23:50:27,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:50:27,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:27,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:50:27,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:50:27,984 INFO L87 Difference]: Start difference. First operand 2176 states and 3346 transitions. Second operand 4 states. [2020-10-27 23:50:28,331 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:50:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:30,363 INFO L93 Difference]: Finished difference Result 5800 states and 8860 transitions. [2020-10-27 23:50:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:50:30,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2020-10-27 23:50:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:30,386 INFO L225 Difference]: With dead ends: 5800 [2020-10-27 23:50:30,386 INFO L226 Difference]: Without dead ends: 4063 [2020-10-27 23:50:30,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2020-10-27 23:50:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3900. [2020-10-27 23:50:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3900 states. [2020-10-27 23:50:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 5916 transitions. [2020-10-27 23:50:30,595 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 5916 transitions. Word has length 139 [2020-10-27 23:50:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:30,596 INFO L481 AbstractCegarLoop]: Abstraction has 3900 states and 5916 transitions. [2020-10-27 23:50:30,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:50:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 5916 transitions. [2020-10-27 23:50:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 23:50:30,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:30,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:50:30,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:50:30,606 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:30,607 INFO L82 PathProgramCache]: Analyzing trace with hash -873252717, now seen corresponding path program 1 times [2020-10-27 23:50:30,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:30,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216509612] [2020-10-27 23:50:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:30,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:30,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:30,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:30,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:30,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:30,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:30,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:30,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:31,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:31,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:31,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:33,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:35,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:35,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 23:50:35,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:50:35,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:50:35,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:35,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:50:35,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 23:50:35,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:50:35,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:35,994 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:50:35,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:36,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:36,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:36,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:36,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:36,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:50:36,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:36,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:36,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:36,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216509612] [2020-10-27 23:50:36,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:36,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:50:36,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130291812] [2020-10-27 23:50:36,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:50:36,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:36,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:50:36,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:50:36,062 INFO L87 Difference]: Start difference. First operand 3900 states and 5916 transitions. Second operand 4 states. [2020-10-27 23:50:36,427 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:50:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:38,411 INFO L93 Difference]: Finished difference Result 10632 states and 16022 transitions. [2020-10-27 23:50:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:50:38,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2020-10-27 23:50:38,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:38,448 INFO L225 Difference]: With dead ends: 10632 [2020-10-27 23:50:38,448 INFO L226 Difference]: Without dead ends: 7361 [2020-10-27 23:50:38,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7361 states. [2020-10-27 23:50:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7361 to 7030. [2020-10-27 23:50:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7030 states. [2020-10-27 23:50:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7030 states to 7030 states and 10498 transitions. [2020-10-27 23:50:38,872 INFO L78 Accepts]: Start accepts. Automaton has 7030 states and 10498 transitions. Word has length 141 [2020-10-27 23:50:38,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:38,872 INFO L481 AbstractCegarLoop]: Abstraction has 7030 states and 10498 transitions. [2020-10-27 23:50:38,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:50:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 7030 states and 10498 transitions. [2020-10-27 23:50:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 23:50:38,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:38,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:50:38,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:50:38,891 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:38,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:38,891 INFO L82 PathProgramCache]: Analyzing trace with hash 439767439, now seen corresponding path program 1 times [2020-10-27 23:50:38,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:38,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561727897] [2020-10-27 23:50:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:38,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:38,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:43,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:43,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 23:50:43,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:50:43,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:50:43,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:50:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 23:50:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 23:50:43,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:44,256 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:50:44,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:44,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:44,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:44,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:44,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:44,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:50:44,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:44,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:44,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561727897] [2020-10-27 23:50:44,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:44,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:50:44,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111773758] [2020-10-27 23:50:44,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:50:44,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:44,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:50:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:50:44,302 INFO L87 Difference]: Start difference. First operand 7030 states and 10498 transitions. Second operand 4 states. [2020-10-27 23:50:47,074 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 23:50:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:47,108 INFO L93 Difference]: Finished difference Result 19038 states and 28354 transitions. [2020-10-27 23:50:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:50:47,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-10-27 23:50:47,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:47,165 INFO L225 Difference]: With dead ends: 19038 [2020-10-27 23:50:47,165 INFO L226 Difference]: Without dead ends: 13503 [2020-10-27 23:50:47,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13503 states. [2020-10-27 23:50:47,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13503 to 13500. [2020-10-27 23:50:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13500 states. [2020-10-27 23:50:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13500 states to 13500 states and 20022 transitions. [2020-10-27 23:50:47,839 INFO L78 Accepts]: Start accepts. Automaton has 13500 states and 20022 transitions. Word has length 143 [2020-10-27 23:50:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:47,839 INFO L481 AbstractCegarLoop]: Abstraction has 13500 states and 20022 transitions. [2020-10-27 23:50:47,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:50:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 13500 states and 20022 transitions. [2020-10-27 23:50:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 23:50:47,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:47,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:50:47,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:50:47,880 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash -639143638, now seen corresponding path program 1 times [2020-10-27 23:50:47,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:47,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144248589] [2020-10-27 23:50:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:47,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:47,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:47,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:48,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:50,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:50,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:52,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:52,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 23:50:52,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:50:52,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:50:52,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:52,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:50:52,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 23:50:52,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:50:52,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:53,269 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:50:53,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:53,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:53,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:53,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:53,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:53,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:50:53,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:53,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:53,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144248589] [2020-10-27 23:50:53,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:53,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:50:53,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431805887] [2020-10-27 23:50:53,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:50:53,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:50:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:50:53,328 INFO L87 Difference]: Start difference. First operand 13500 states and 20022 transitions. Second operand 4 states. [2020-10-27 23:50:53,673 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:50:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:56,374 INFO L93 Difference]: Finished difference Result 38001 states and 55999 transitions. [2020-10-27 23:50:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:50:56,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-10-27 23:50:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:56,434 INFO L225 Difference]: With dead ends: 38001 [2020-10-27 23:50:56,434 INFO L226 Difference]: Without dead ends: 25516 [2020-10-27 23:50:56,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25516 states. [2020-10-27 23:50:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25516 to 24309. [2020-10-27 23:50:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24309 states. [2020-10-27 23:50:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24309 states to 24309 states and 35398 transitions. [2020-10-27 23:50:57,644 INFO L78 Accepts]: Start accepts. Automaton has 24309 states and 35398 transitions. Word has length 143 [2020-10-27 23:50:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:57,644 INFO L481 AbstractCegarLoop]: Abstraction has 24309 states and 35398 transitions. [2020-10-27 23:50:57,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:50:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 24309 states and 35398 transitions. [2020-10-27 23:50:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 23:50:57,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:57,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:50:57,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:50:57,695 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:57,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1512383080, now seen corresponding path program 1 times [2020-10-27 23:50:57,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:57,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879875657] [2020-10-27 23:50:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:57,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:57,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:57,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:57,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:57,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:58,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:58,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:58,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:58,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:58,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:58,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:02,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:02,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 23:51:02,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:51:02,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:51:02,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:02,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:51:02,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 23:51:02,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:51:02,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:03,102 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:51:03,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:51:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:03,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:03,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:51:03,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:51:03,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:51:03,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:03,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:51:03,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:51:03,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:51:03,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:51:03,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879875657] [2020-10-27 23:51:03,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:51:03,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:51:03,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322037832] [2020-10-27 23:51:03,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:51:03,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:51:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:51:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:51:03,153 INFO L87 Difference]: Start difference. First operand 24309 states and 35398 transitions. Second operand 4 states. [2020-10-27 23:51:03,506 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:51:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:51:06,793 INFO L93 Difference]: Finished difference Result 59629 states and 86703 transitions. [2020-10-27 23:51:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:51:06,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-10-27 23:51:06,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:51:06,874 INFO L225 Difference]: With dead ends: 59629 [2020-10-27 23:51:06,874 INFO L226 Difference]: Without dead ends: 37825 [2020-10-27 23:51:06,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:51:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37825 states. [2020-10-27 23:51:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37825 to 35922. [2020-10-27 23:51:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35922 states. [2020-10-27 23:51:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35922 states to 35922 states and 51564 transitions. [2020-10-27 23:51:09,091 INFO L78 Accepts]: Start accepts. Automaton has 35922 states and 51564 transitions. Word has length 145 [2020-10-27 23:51:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:51:09,091 INFO L481 AbstractCegarLoop]: Abstraction has 35922 states and 51564 transitions. [2020-10-27 23:51:09,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:51:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 35922 states and 51564 transitions. [2020-10-27 23:51:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 23:51:09,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:51:09,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:51:09,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:51:09,137 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:51:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:51:09,138 INFO L82 PathProgramCache]: Analyzing trace with hash -239601795, now seen corresponding path program 1 times [2020-10-27 23:51:09,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:51:09,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643088186] [2020-10-27 23:51:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:51:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:09,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:10,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:10,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:14,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:14,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 23:51:14,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:51:14,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:51:14,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:14,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:51:14,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-27 23:51:14,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:51:14,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:14,524 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:51:14,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:51:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:14,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:14,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:14,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:51:14,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:51:14,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:51:14,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:51:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:51:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:51:14,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:51:14,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643088186] [2020-10-27 23:51:14,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:51:14,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:51:14,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661994449] [2020-10-27 23:51:14,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:51:14,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:51:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:51:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:51:14,560 INFO L87 Difference]: Start difference. First operand 35922 states and 51564 transitions. Second operand 5 states. [2020-10-27 23:51:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:51:17,434 INFO L93 Difference]: Finished difference Result 54353 states and 78090 transitions. [2020-10-27 23:51:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:51:17,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-10-27 23:51:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:51:17,494 INFO L225 Difference]: With dead ends: 54353 [2020-10-27 23:51:17,494 INFO L226 Difference]: Without dead ends: 31982 [2020-10-27 23:51:17,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:51:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31982 states. [2020-10-27 23:51:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31982 to 30570. [2020-10-27 23:51:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30570 states. [2020-10-27 23:51:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30570 states to 30570 states and 43694 transitions. [2020-10-27 23:51:19,287 INFO L78 Accepts]: Start accepts. Automaton has 30570 states and 43694 transitions. Word has length 147 [2020-10-27 23:51:19,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:51:19,287 INFO L481 AbstractCegarLoop]: Abstraction has 30570 states and 43694 transitions. [2020-10-27 23:51:19,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:51:19,288 INFO L276 IsEmpty]: Start isEmpty. Operand 30570 states and 43694 transitions. [2020-10-27 23:51:19,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 23:51:19,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:51:19,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:51:19,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:51:19,325 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:51:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:51:19,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1049344850, now seen corresponding path program 1 times [2020-10-27 23:51:19,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:51:19,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095605532] [2020-10-27 23:51:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:51:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:19,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:19,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:19,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:19,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:19,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:19,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:19,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:19,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:20,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:22,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:22,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:24,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:24,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 23:51:24,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:51:24,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:51:24,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:24,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:51:24,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 23:51:24,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:51:24,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:24,738 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:51:24,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:51:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:24,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:24,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:24,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:51:24,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:51:24,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:51:24,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:24,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:51:24,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:51:24,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:51:24,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:51:24,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095605532] [2020-10-27 23:51:24,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:51:24,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:51:24,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902374709] [2020-10-27 23:51:24,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:51:24,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:51:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:51:24,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:51:24,775 INFO L87 Difference]: Start difference. First operand 30570 states and 43694 transitions. Second operand 5 states. [2020-10-27 23:51:27,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:51:27,241 INFO L93 Difference]: Finished difference Result 41797 states and 59928 transitions. [2020-10-27 23:51:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:51:27,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-10-27 23:51:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:51:27,282 INFO L225 Difference]: With dead ends: 41797 [2020-10-27 23:51:27,283 INFO L226 Difference]: Without dead ends: 30006 [2020-10-27 23:51:27,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:51:27,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30006 states. [2020-10-27 23:51:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30006 to 28594. [2020-10-27 23:51:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28594 states. [2020-10-27 23:51:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28594 states to 28594 states and 40744 transitions. [2020-10-27 23:51:28,607 INFO L78 Accepts]: Start accepts. Automaton has 28594 states and 40744 transitions. Word has length 151 [2020-10-27 23:51:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:51:28,608 INFO L481 AbstractCegarLoop]: Abstraction has 28594 states and 40744 transitions. [2020-10-27 23:51:28,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:51:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 28594 states and 40744 transitions. [2020-10-27 23:51:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 23:51:28,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:51:28,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:51:28,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:51:28,642 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:51:28,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:51:28,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1443822831, now seen corresponding path program 1 times [2020-10-27 23:51:28,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:51:28,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379393637] [2020-10-27 23:51:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:51:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:28,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:28,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:28,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:28,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:28,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:29,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:29,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:29,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:30,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:30,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:30,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:31,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:31,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:31,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:31,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:31,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:31,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:31,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:32,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:33,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:33,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:33,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 23:51:33,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 23:51:33,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:51:33,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:51:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 23:51:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 23:51:33,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:34,455 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:51:34,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:51:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:34,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:34,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:34,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:51:34,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:51:34,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:51:34,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:34,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:51:34,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:51:34,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:51:34,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:51:34,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379393637] [2020-10-27 23:51:34,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:51:34,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:51:34,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562906726] [2020-10-27 23:51:34,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:51:34,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:51:34,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:51:34,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:51:34,539 INFO L87 Difference]: Start difference. First operand 28594 states and 40744 transitions. Second operand 12 states. [2020-10-27 23:51:35,046 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:51:39,814 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-27 23:51:39,987 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-27 23:51:42,325 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-27 23:51:44,587 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-27 23:51:45,372 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:51:45,869 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 23:51:48,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:51:48,288 INFO L93 Difference]: Finished difference Result 94600 states and 135320 transitions. [2020-10-27 23:51:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 23:51:48,288 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 153 [2020-10-27 23:51:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:51:48,369 INFO L225 Difference]: With dead ends: 94600 [2020-10-27 23:51:48,369 INFO L226 Difference]: Without dead ends: 66838 [2020-10-27 23:51:48,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=325, Invalid=865, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 23:51:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66838 states. [2020-10-27 23:51:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66838 to 30826. [2020-10-27 23:51:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30826 states. [2020-10-27 23:51:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30826 states to 30826 states and 43338 transitions. [2020-10-27 23:51:52,059 INFO L78 Accepts]: Start accepts. Automaton has 30826 states and 43338 transitions. Word has length 153 [2020-10-27 23:51:52,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:51:52,059 INFO L481 AbstractCegarLoop]: Abstraction has 30826 states and 43338 transitions. [2020-10-27 23:51:52,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:51:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 30826 states and 43338 transitions. [2020-10-27 23:51:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 23:51:52,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:51:52,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:51:52,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:51:52,084 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:51:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:51:52,084 INFO L82 PathProgramCache]: Analyzing trace with hash -3123875, now seen corresponding path program 1 times [2020-10-27 23:51:52,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:51:52,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742602096] [2020-10-27 23:51:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:51:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:52,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:52,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:52,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:52,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:52,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:52,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:52,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:52,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:53,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:54,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:54,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:55,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:57,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:57,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 23:51:57,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:51:57,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 23:51:57,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:51:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 23:51:57,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 23:51:57,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:57,445 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:51:57,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:51:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:57,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:57,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:57,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:51:57,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:51:57,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:51:57,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:51:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:51:57,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:51:57,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:51:57,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742602096] [2020-10-27 23:51:57,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:51:57,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:51:57,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398745615] [2020-10-27 23:51:57,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:51:57,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:51:57,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:51:57,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:51:57,488 INFO L87 Difference]: Start difference. First operand 30826 states and 43338 transitions. Second operand 4 states. [2020-10-27 23:52:04,087 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 23:52:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:52:04,832 INFO L93 Difference]: Finished difference Result 80966 states and 113390 transitions. [2020-10-27 23:52:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:52:04,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-10-27 23:52:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:52:04,928 INFO L225 Difference]: With dead ends: 80966 [2020-10-27 23:52:04,928 INFO L226 Difference]: Without dead ends: 58379 [2020-10-27 23:52:04,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:52:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58379 states. [2020-10-27 23:52:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58379 to 58376. [2020-10-27 23:52:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58376 states. [2020-10-27 23:52:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58376 states to 58376 states and 81354 transitions. [2020-10-27 23:52:11,034 INFO L78 Accepts]: Start accepts. Automaton has 58376 states and 81354 transitions. Word has length 153 [2020-10-27 23:52:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:52:11,034 INFO L481 AbstractCegarLoop]: Abstraction has 58376 states and 81354 transitions. [2020-10-27 23:52:11,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:52:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 58376 states and 81354 transitions. [2020-10-27 23:52:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 23:52:11,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:52:11,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:52:11,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:52:11,084 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:52:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:52:11,084 INFO L82 PathProgramCache]: Analyzing trace with hash -355819294, now seen corresponding path program 1 times [2020-10-27 23:52:11,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:52:11,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664208526] [2020-10-27 23:52:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:52:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:11,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:11,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:11,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:11,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:11,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:11,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:11,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:12,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:12,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:15,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:15,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:15,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:15,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:15,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:16,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:16,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:16,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:16,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 23:52:16,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:52:16,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 23:52:16,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:16,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:52:16,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 23:52:16,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 23:52:16,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:52:16,683 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 23 [2020-10-27 23:52:17,056 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:52:17,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:52:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:17,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:17,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:17,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:52:17,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:52:17,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:52:17,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:17,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:52:17,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:52:17,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:52:17,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:52:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:52:17,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664208526] [2020-10-27 23:52:17,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:52:17,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:52:17,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474733318] [2020-10-27 23:52:17,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:52:17,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:52:17,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:52:17,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:52:17,129 INFO L87 Difference]: Start difference. First operand 58376 states and 81354 transitions. Second operand 12 states. [2020-10-27 23:52:17,596 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:52:22,824 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-27 23:52:27,090 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-10-27 23:52:28,767 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-27 23:52:30,388 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:52:30,997 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:52:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:52:39,013 INFO L93 Difference]: Finished difference Result 182932 states and 255344 transitions. [2020-10-27 23:52:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 23:52:39,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 153 [2020-10-27 23:52:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:52:39,509 INFO L225 Difference]: With dead ends: 182932 [2020-10-27 23:52:39,509 INFO L226 Difference]: Without dead ends: 127847 [2020-10-27 23:52:39,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=325, Invalid=865, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 23:52:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127847 states. [2020-10-27 23:52:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127847 to 63696. [2020-10-27 23:52:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63696 states. [2020-10-27 23:52:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63696 states to 63696 states and 87694 transitions. [2020-10-27 23:52:48,327 INFO L78 Accepts]: Start accepts. Automaton has 63696 states and 87694 transitions. Word has length 153 [2020-10-27 23:52:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:52:48,327 INFO L481 AbstractCegarLoop]: Abstraction has 63696 states and 87694 transitions. [2020-10-27 23:52:48,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:52:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 63696 states and 87694 transitions. [2020-10-27 23:52:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 23:52:48,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:52:48,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:52:48,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:52:48,383 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:52:48,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:52:48,383 INFO L82 PathProgramCache]: Analyzing trace with hash 35797721, now seen corresponding path program 1 times [2020-10-27 23:52:48,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:52:48,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127205945] [2020-10-27 23:52:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:52:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:48,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:48,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:48,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:48,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:48,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:49,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:49,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:49,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:50,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:50,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:53,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:53,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:53,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:53,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:53,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:53,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 23:52:53,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:52:53,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 23:52:53,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:53,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:52:53,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 23:52:53,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:52:53,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:52:53,783 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:52:53,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:52:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:53,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:53,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:53,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:52:53,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:52:53,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:52:53,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:53,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:52:53,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:52:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:52:53,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:52:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:52:53,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127205945] [2020-10-27 23:52:53,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:52:53,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:52:53,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920213996] [2020-10-27 23:52:53,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:52:53,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:52:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:52:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:52:53,828 INFO L87 Difference]: Start difference. First operand 63696 states and 87694 transitions. Second operand 4 states. [2020-10-27 23:52:54,155 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:53:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:53:03,101 INFO L93 Difference]: Finished difference Result 88058 states and 121718 transitions. [2020-10-27 23:53:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:53:03,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-10-27 23:53:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:53:03,175 INFO L225 Difference]: With dead ends: 88058 [2020-10-27 23:53:03,175 INFO L226 Difference]: Without dead ends: 64135 [2020-10-27 23:53:03,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:53:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64135 states. [2020-10-27 23:53:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64135 to 63696. [2020-10-27 23:53:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63696 states. [2020-10-27 23:53:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63696 states to 63696 states and 87566 transitions. [2020-10-27 23:53:11,228 INFO L78 Accepts]: Start accepts. Automaton has 63696 states and 87566 transitions. Word has length 153 [2020-10-27 23:53:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:53:11,229 INFO L481 AbstractCegarLoop]: Abstraction has 63696 states and 87566 transitions. [2020-10-27 23:53:11,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:53:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 63696 states and 87566 transitions. [2020-10-27 23:53:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 23:53:11,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:53:11,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:53:11,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:53:11,285 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:53:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:53:11,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1091921176, now seen corresponding path program 1 times [2020-10-27 23:53:11,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:53:11,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980951494] [2020-10-27 23:53:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:53:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:11,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:11,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:11,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:11,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:11,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:11,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:11,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:11,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking...