/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:41:20,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:41:20,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:41:20,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:41:20,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:41:20,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:41:20,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:41:20,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:41:20,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:41:20,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:41:20,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:41:20,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:41:20,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:41:20,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:41:20,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:41:20,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:41:20,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:41:20,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:41:20,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:41:20,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:41:20,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:41:20,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:41:20,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:41:20,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:41:20,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:41:20,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:41:20,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:41:20,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:41:20,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:41:20,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:41:20,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:41:20,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:41:20,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:41:20,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:41:20,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:41:20,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:41:20,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:41:20,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:41:20,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:41:20,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:41:20,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:41:20,369 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 [2020-10-28 18:41:20,427 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:41:20,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:41:20,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:41:20,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:41:20,431 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:41:20,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:41:20,432 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:41:20,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:41:20,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:41:20,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:41:20,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:41:20,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:41:20,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:41:20,435 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:41:20,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:41:20,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:41:20,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:41:20,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:41:20,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:41:20,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:41:20,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:41:20,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:41:20,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:41:20,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:41:20,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:41:20,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:41:20,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:41:20,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:41:20,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:41:20,438 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:41:20,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:41:20,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:41:20,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:41:20,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:41:20,941 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:41:20,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:41:21,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c09f85efb/8354fa13af5342b98acb83edf418fa4c/FLAGb936d9c87 [2020-10-28 18:41:22,021 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:41:22,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:41:22,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c09f85efb/8354fa13af5342b98acb83edf418fa4c/FLAGb936d9c87 [2020-10-28 18:41:22,471 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c09f85efb/8354fa13af5342b98acb83edf418fa4c [2020-10-28 18:41:22,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:41:22,481 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:41:22,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:41:22,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:41:22,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:41:22,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:41:22" (1/1) ... [2020-10-28 18:41:22,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af2db43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:22, skipping insertion in model container [2020-10-28 18:41:22,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:41:22" (1/1) ... [2020-10-28 18:41:22,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:41:22,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:41:23,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:41:24,002 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:41:24,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:41:24,569 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:41:24,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:24 WrapperNode [2020-10-28 18:41:24,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:41:24,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:41:24,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:41:24,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:41:24,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:24" (1/1) ... [2020-10-28 18:41:24,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:24" (1/1) ... [2020-10-28 18:41:24,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:24" (1/1) ... [2020-10-28 18:41:24,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:24" (1/1) ... [2020-10-28 18:41:24,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:24" (1/1) ... [2020-10-28 18:41:24,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:24" (1/1) ... [2020-10-28 18:41:24,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:24" (1/1) ... [2020-10-28 18:41:24,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:41:24,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:41:24,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:41:24,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:41:24,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:24" (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 [2020-10-28 18:41:24,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:41:24,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:41:24,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:41:24,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:41:24,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:41:24,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:41:24,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:41:24,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:41:24,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:41:24,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:41:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:41:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:41:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:41:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:41:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:41:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:41:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:41:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:41:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:41:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:41:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:41:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 18:41:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:41:24,941 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:41:24,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:41:24,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:41:24,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:41:24,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:41:24,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:41:24,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:41:24,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:41:29,621 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:41:29,621 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:41:29,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:41:29 BoogieIcfgContainer [2020-10-28 18:41:29,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:41:29,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:41:29,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:41:29,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:41:29,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:41:22" (1/3) ... [2020-10-28 18:41:29,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b824585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:41:29, skipping insertion in model container [2020-10-28 18:41:29,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:24" (2/3) ... [2020-10-28 18:41:29,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b824585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:41:29, skipping insertion in model container [2020-10-28 18:41:29,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:41:29" (3/3) ... [2020-10-28 18:41:29,649 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:41:29,661 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:41:29,668 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:41:29,681 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:41:29,729 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:41:29,729 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:41:29,729 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:41:29,729 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:41:29,729 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:41:29,730 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:41:29,730 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:41:29,730 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:41:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states. [2020-10-28 18:41:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 18:41:29,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:29,803 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] [2020-10-28 18:41:29,803 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:29,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:29,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1673233271, now seen corresponding path program 1 times [2020-10-28 18:41:29,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:29,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881185176] [2020-10-28 18:41:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:30,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:31,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:31,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:31,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:31,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:32,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:32,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:33,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:33,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:34,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:34,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:35,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:35,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 18:41:35,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:41:35,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:41:35,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:35,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:35,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:41:35,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:41:35,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 18:41:35,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:41:37,065 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:41:37,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:37,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:37,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:37,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:37,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:37,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-28 18:41:37,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:37,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:37,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:41:37,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:37,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:41:37,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:41:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:41:37,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881185176] [2020-10-28 18:41:37,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:37,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:41:37,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385291620] [2020-10-28 18:41:37,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:41:37,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:41:37,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:41:37,331 INFO L87 Difference]: Start difference. First operand 1133 states. Second operand 6 states. [2020-10-28 18:41:39,126 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 504 [2020-10-28 18:41:49,668 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-28 18:41:50,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:50,411 INFO L93 Difference]: Finished difference Result 2013 states and 3577 transitions. [2020-10-28 18:41:50,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:41:50,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2020-10-28 18:41:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:50,447 INFO L225 Difference]: With dead ends: 2013 [2020-10-28 18:41:50,447 INFO L226 Difference]: Without dead ends: 1180 [2020-10-28 18:41:50,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:41:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2020-10-28 18:41:50,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1114. [2020-10-28 18:41:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2020-10-28 18:41:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1514 transitions. [2020-10-28 18:41:50,597 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1514 transitions. Word has length 90 [2020-10-28 18:41:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:41:50,598 INFO L481 AbstractCegarLoop]: Abstraction has 1114 states and 1514 transitions. [2020-10-28 18:41:50,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:41:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1514 transitions. [2020-10-28 18:41:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 18:41:50,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:50,606 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] [2020-10-28 18:41:50,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:41:50,606 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash -445145111, now seen corresponding path program 1 times [2020-10-28 18:41:50,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:50,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933469500] [2020-10-28 18:41:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:50,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:50,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:50,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:51,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:51,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:51,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:52,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:52,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:55,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:55,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 18:41:55,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:41:55,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:41:55,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:55,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:55,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:41:55,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:41:55,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:41:55,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:41:57,403 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:41:57,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:57,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:57,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:57,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:57,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:57,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 18:41:57,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:57,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:57,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:41:57,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:57,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:41:57,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:41:57,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933469500] [2020-10-28 18:41:57,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:57,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:41:57,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894781697] [2020-10-28 18:41:57,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:41:57,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:57,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:41:57,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:41:57,578 INFO L87 Difference]: Start difference. First operand 1114 states and 1514 transitions. Second operand 6 states. [2020-10-28 18:41:59,329 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 504 [2020-10-28 18:42:06,472 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-28 18:42:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:42:07,220 INFO L93 Difference]: Finished difference Result 2220 states and 3079 transitions. [2020-10-28 18:42:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:42:07,221 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-28 18:42:07,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:42:07,230 INFO L225 Difference]: With dead ends: 2220 [2020-10-28 18:42:07,230 INFO L226 Difference]: Without dead ends: 1338 [2020-10-28 18:42:07,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:42:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2020-10-28 18:42:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1274. [2020-10-28 18:42:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2020-10-28 18:42:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1747 transitions. [2020-10-28 18:42:07,306 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1747 transitions. Word has length 91 [2020-10-28 18:42:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:42:07,307 INFO L481 AbstractCegarLoop]: Abstraction has 1274 states and 1747 transitions. [2020-10-28 18:42:07,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:42:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1747 transitions. [2020-10-28 18:42:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 18:42:07,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:42:07,312 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] [2020-10-28 18:42:07,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:42:07,312 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:42:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:42:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1533859313, now seen corresponding path program 1 times [2020-10-28 18:42:07,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:42:07,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650851061] [2020-10-28 18:42:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:42:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:07,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:07,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:07,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:07,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:08,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:08,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:08,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:09,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:09,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:10,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:10,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:12,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:12,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 18:42:12,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:42:12,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 18:42:12,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:12,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:12,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:42:12,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:42:12,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 18:42:12,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:42:14,200 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:42:14,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:42:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:14,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:14,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:14,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:42:14,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:14,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:42:14,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:14,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:42:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:42:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:42:14,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:42:14,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650851061] [2020-10-28 18:42:14,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:42:14,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:42:14,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255167054] [2020-10-28 18:42:14,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:42:14,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:42:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:42:14,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:42:14,342 INFO L87 Difference]: Start difference. First operand 1274 states and 1747 transitions. Second operand 7 states. [2020-10-28 18:42:16,145 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 506 [2020-10-28 18:42:23,031 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 504 [2020-10-28 18:42:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:42:24,461 INFO L93 Difference]: Finished difference Result 2157 states and 3019 transitions. [2020-10-28 18:42:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:42:24,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-28 18:42:24,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:42:24,475 INFO L225 Difference]: With dead ends: 2157 [2020-10-28 18:42:24,475 INFO L226 Difference]: Without dead ends: 1481 [2020-10-28 18:42:24,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:42:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-10-28 18:42:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1274. [2020-10-28 18:42:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2020-10-28 18:42:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1746 transitions. [2020-10-28 18:42:24,558 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1746 transitions. Word has length 92 [2020-10-28 18:42:24,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:42:24,559 INFO L481 AbstractCegarLoop]: Abstraction has 1274 states and 1746 transitions. [2020-10-28 18:42:24,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:42:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1746 transitions. [2020-10-28 18:42:24,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 18:42:24,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:42:24,563 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] [2020-10-28 18:42:24,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:42:24,563 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:42:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:42:24,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1581012426, now seen corresponding path program 1 times [2020-10-28 18:42:24,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:42:24,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293530284] [2020-10-28 18:42:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:42:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:24,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:24,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:24,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:24,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:25,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:26,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:26,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:26,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:27,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:27,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:27,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:27,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:29,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:29,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 18:42:29,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:42:29,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:42:29,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:29,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:29,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:42:29,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:42:29,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 18:42:29,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:31,439 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:42:31,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:42:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:31,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:31,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:31,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:42:31,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:31,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 18:42:31,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:31,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:31,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:42:31,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:42:31,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:42:31,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:42:31,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293530284] [2020-10-28 18:42:31,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:42:31,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:42:31,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037125137] [2020-10-28 18:42:31,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:42:31,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:42:31,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:42:31,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:42:31,581 INFO L87 Difference]: Start difference. First operand 1274 states and 1746 transitions. Second operand 6 states. [2020-10-28 18:42:33,370 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-28 18:42:39,733 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-28 18:42:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:42:40,528 INFO L93 Difference]: Finished difference Result 2905 states and 4075 transitions. [2020-10-28 18:42:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:42:40,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-28 18:42:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:42:40,539 INFO L225 Difference]: With dead ends: 2905 [2020-10-28 18:42:40,539 INFO L226 Difference]: Without dead ends: 1799 [2020-10-28 18:42:40,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:42:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2020-10-28 18:42:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1733. [2020-10-28 18:42:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2020-10-28 18:42:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2432 transitions. [2020-10-28 18:42:40,652 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2432 transitions. Word has length 92 [2020-10-28 18:42:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:42:40,652 INFO L481 AbstractCegarLoop]: Abstraction has 1733 states and 2432 transitions. [2020-10-28 18:42:40,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:42:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2432 transitions. [2020-10-28 18:42:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 18:42:40,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:42:40,656 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] [2020-10-28 18:42:40,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:42:40,656 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:42:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:42:40,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1394788530, now seen corresponding path program 1 times [2020-10-28 18:42:40,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:42:40,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203668422] [2020-10-28 18:42:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:42:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:40,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:40,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:40,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:41,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:41,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:41,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:41,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:43,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:43,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:44,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:45,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:45,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 18:42:45,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:42:45,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:42:45,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:45,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:42:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:42:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 18:42:45,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:47,545 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:42:47,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:42:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:47,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:47,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:47,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:42:47,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:47,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-28 18:42:47,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:47,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:47,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:42:47,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:42:47,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:42:47,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:42:47,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203668422] [2020-10-28 18:42:47,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:42:47,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:42:47,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404224596] [2020-10-28 18:42:47,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:42:47,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:42:47,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:42:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:42:47,689 INFO L87 Difference]: Start difference. First operand 1733 states and 2432 transitions. Second operand 8 states. [2020-10-28 18:42:49,406 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-28 18:42:55,964 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 507 [2020-10-28 18:42:58,197 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-28 18:43:01,959 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-28 18:43:03,688 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 498 [2020-10-28 18:43:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:04,189 INFO L93 Difference]: Finished difference Result 9942 states and 15030 transitions. [2020-10-28 18:43:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 18:43:04,190 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2020-10-28 18:43:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:04,235 INFO L225 Difference]: With dead ends: 9942 [2020-10-28 18:43:04,235 INFO L226 Difference]: Without dead ends: 8887 [2020-10-28 18:43:04,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:43:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2020-10-28 18:43:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 1741. [2020-10-28 18:43:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1741 states. [2020-10-28 18:43:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2434 transitions. [2020-10-28 18:43:04,569 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2434 transitions. Word has length 93 [2020-10-28 18:43:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:43:04,570 INFO L481 AbstractCegarLoop]: Abstraction has 1741 states and 2434 transitions. [2020-10-28 18:43:04,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:43:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2434 transitions. [2020-10-28 18:43:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 18:43:04,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:43:04,574 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] [2020-10-28 18:43:04,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:43:04,574 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:43:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:43:04,575 INFO L82 PathProgramCache]: Analyzing trace with hash 125394197, now seen corresponding path program 1 times [2020-10-28 18:43:04,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:43:04,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891903447] [2020-10-28 18:43:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:43:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:04,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:04,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:04,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:05,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:05,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:05,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:05,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:07,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:07,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:09,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:09,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 18:43:09,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:43:09,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:43:09,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:09,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:43:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:43:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 18:43:09,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:11,478 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:43:11,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:43:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:11,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:11,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:11,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:43:11,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:43:11,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:43:11,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:11,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:11,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:43:11,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:43:11,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:43:11,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:43:11,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891903447] [2020-10-28 18:43:11,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:43:11,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:43:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487989768] [2020-10-28 18:43:11,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:43:11,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:43:11,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:43:11,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:43:11,566 INFO L87 Difference]: Start difference. First operand 1741 states and 2434 transitions. Second operand 8 states. [2020-10-28 18:43:13,335 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 504 [2020-10-28 18:43:18,227 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 506 [2020-10-28 18:43:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:19,221 INFO L93 Difference]: Finished difference Result 2641 states and 3800 transitions. [2020-10-28 18:43:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:43:19,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2020-10-28 18:43:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:19,230 INFO L225 Difference]: With dead ends: 2641 [2020-10-28 18:43:19,231 INFO L226 Difference]: Without dead ends: 1582 [2020-10-28 18:43:19,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:43:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2020-10-28 18:43:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1243. [2020-10-28 18:43:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2020-10-28 18:43:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1742 transitions. [2020-10-28 18:43:19,370 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1742 transitions. Word has length 93 [2020-10-28 18:43:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:43:19,370 INFO L481 AbstractCegarLoop]: Abstraction has 1243 states and 1742 transitions. [2020-10-28 18:43:19,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:43:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1742 transitions. [2020-10-28 18:43:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 18:43:19,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:43:19,373 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] [2020-10-28 18:43:19,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:43:19,373 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:43:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:43:19,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1815112323, now seen corresponding path program 1 times [2020-10-28 18:43:19,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:43:19,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280795156] [2020-10-28 18:43:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:43:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:19,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:19,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:19,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:20,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:20,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:21,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:21,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:21,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:22,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:22,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:22,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:22,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:23,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:24,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:24,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 18:43:24,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:43:24,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:43:24,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:24,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:43:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:43:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 18:43:24,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:26,185 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:43:26,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:43:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:26,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:26,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:26,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:43:26,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:43:26,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 18:43:26,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:26,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:26,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:43:26,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:43:26,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:43:26,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:43:26,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280795156] [2020-10-28 18:43:26,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:43:26,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:43:26,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637236893] [2020-10-28 18:43:26,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:43:26,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:43:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:43:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:43:26,317 INFO L87 Difference]: Start difference. First operand 1243 states and 1742 transitions. Second operand 8 states. [2020-10-28 18:43:28,039 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-28 18:43:32,937 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-28 18:43:36,522 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-28 18:43:36,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:36,905 INFO L93 Difference]: Finished difference Result 5773 states and 8569 transitions. [2020-10-28 18:43:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:43:36,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 95 [2020-10-28 18:43:36,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:36,927 INFO L225 Difference]: With dead ends: 5773 [2020-10-28 18:43:36,928 INFO L226 Difference]: Without dead ends: 4708 [2020-10-28 18:43:36,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:43:36,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2020-10-28 18:43:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 1253. [2020-10-28 18:43:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1253 states. [2020-10-28 18:43:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1753 transitions. [2020-10-28 18:43:37,197 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1753 transitions. Word has length 95 [2020-10-28 18:43:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:43:37,198 INFO L481 AbstractCegarLoop]: Abstraction has 1253 states and 1753 transitions. [2020-10-28 18:43:37,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:43:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1753 transitions. [2020-10-28 18:43:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 18:43:37,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:43:37,200 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] [2020-10-28 18:43:37,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:43:37,201 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:43:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:43:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1999591788, now seen corresponding path program 1 times [2020-10-28 18:43:37,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:43:37,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250588202] [2020-10-28 18:43:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:43:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:37,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:37,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:37,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:37,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:38,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:39,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:39,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:40,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:42,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:42,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 18:43:42,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:43:42,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:43:42,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:42,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:43:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:43:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 18:43:42,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:44,046 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:43:44,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:43:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:44,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:44,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:44,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:43:44,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:43:44,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-28 18:43:44,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:44,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:43:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:43:44,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:43:44,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:43:44,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250588202] [2020-10-28 18:43:44,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:43:44,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:43:44,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485839093] [2020-10-28 18:43:44,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:43:44,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:43:44,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:43:44,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:43:44,201 INFO L87 Difference]: Start difference. First operand 1253 states and 1753 transitions. Second operand 8 states. [2020-10-28 18:43:46,005 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-28 18:43:50,956 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-28 18:43:54,002 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-28 18:43:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:54,387 INFO L93 Difference]: Finished difference Result 5091 states and 7552 transitions. [2020-10-28 18:43:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:43:54,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 95 [2020-10-28 18:43:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:54,409 INFO L225 Difference]: With dead ends: 5091 [2020-10-28 18:43:54,409 INFO L226 Difference]: Without dead ends: 4225 [2020-10-28 18:43:54,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:43:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2020-10-28 18:43:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 1279. [2020-10-28 18:43:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2020-10-28 18:43:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1776 transitions. [2020-10-28 18:43:54,640 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1776 transitions. Word has length 95 [2020-10-28 18:43:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:43:54,641 INFO L481 AbstractCegarLoop]: Abstraction has 1279 states and 1776 transitions. [2020-10-28 18:43:54,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:43:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1776 transitions. [2020-10-28 18:43:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 18:43:54,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:43:54,643 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] [2020-10-28 18:43:54,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:43:54,644 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:43:54,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:43:54,644 INFO L82 PathProgramCache]: Analyzing trace with hash 906981339, now seen corresponding path program 1 times [2020-10-28 18:43:54,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:43:54,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173591486] [2020-10-28 18:43:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:43:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:54,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:54,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:54,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:55,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:56,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:56,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:56,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:56,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:56,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:57,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:58,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:59,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:59,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 18:43:59,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:43:59,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:43:59,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:59,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:43:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:43:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:43:59,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:01,464 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:44:01,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:44:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:01,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:01,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:01,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:44:01,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:44:01,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 18:44:01,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:01,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:01,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:44:01,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:44:01,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:44:01,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:44:01,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173591486] [2020-10-28 18:44:01,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:44:01,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:44:01,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006910494] [2020-10-28 18:44:01,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:44:01,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:44:01,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:44:01,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:44:01,592 INFO L87 Difference]: Start difference. First operand 1279 states and 1776 transitions. Second operand 6 states. [2020-10-28 18:44:03,353 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 504 [2020-10-28 18:44:08,076 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-28 18:44:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:44:08,953 INFO L93 Difference]: Finished difference Result 3188 states and 4539 transitions. [2020-10-28 18:44:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:44:08,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-10-28 18:44:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:44:08,960 INFO L225 Difference]: With dead ends: 3188 [2020-10-28 18:44:08,961 INFO L226 Difference]: Without dead ends: 2033 [2020-10-28 18:44:08,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:44:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2020-10-28 18:44:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1982. [2020-10-28 18:44:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1982 states. [2020-10-28 18:44:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2829 transitions. [2020-10-28 18:44:09,302 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2829 transitions. Word has length 95 [2020-10-28 18:44:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:44:09,302 INFO L481 AbstractCegarLoop]: Abstraction has 1982 states and 2829 transitions. [2020-10-28 18:44:09,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:44:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2829 transitions. [2020-10-28 18:44:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 18:44:09,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:44:09,305 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] [2020-10-28 18:44:09,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:44:09,306 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:44:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:44:09,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1009287787, now seen corresponding path program 1 times [2020-10-28 18:44:09,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:44:09,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056264337] [2020-10-28 18:44:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:44:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:09,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:09,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:09,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:09,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:11,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:12,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:14,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:14,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 18:44:14,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:44:14,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 18:44:14,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:14,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:14,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:44:14,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:44:14,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 18:44:14,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:16,201 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:44:16,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:44:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:16,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:16,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:16,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:44:16,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:44:16,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:44:16,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:16,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:16,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:44:16,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:44:16,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:44:16,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:44:16,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056264337] [2020-10-28 18:44:16,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:44:16,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:44:16,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423555384] [2020-10-28 18:44:16,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:44:16,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:44:16,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:44:16,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:44:16,277 INFO L87 Difference]: Start difference. First operand 1982 states and 2829 transitions. Second operand 8 states. [2020-10-28 18:44:18,144 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 508 [2020-10-28 18:44:22,942 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 504 [2020-10-28 18:44:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:44:24,693 INFO L93 Difference]: Finished difference Result 5553 states and 8203 transitions. [2020-10-28 18:44:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:44:24,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-28 18:44:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:44:24,709 INFO L225 Difference]: With dead ends: 5553 [2020-10-28 18:44:24,710 INFO L226 Difference]: Without dead ends: 4315 [2020-10-28 18:44:24,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:44:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2020-10-28 18:44:25,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 1982. [2020-10-28 18:44:25,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1982 states. [2020-10-28 18:44:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2827 transitions. [2020-10-28 18:44:25,081 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2827 transitions. Word has length 96 [2020-10-28 18:44:25,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:44:25,082 INFO L481 AbstractCegarLoop]: Abstraction has 1982 states and 2827 transitions. [2020-10-28 18:44:25,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:44:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2827 transitions. [2020-10-28 18:44:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 18:44:25,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:44:25,085 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] [2020-10-28 18:44:25,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:44:25,085 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:44:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:44:25,086 INFO L82 PathProgramCache]: Analyzing trace with hash 634660758, now seen corresponding path program 1 times [2020-10-28 18:44:25,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:44:25,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422424854] [2020-10-28 18:44:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:44:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:25,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:25,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:25,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:25,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:25,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:26,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:26,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:27,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:27,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:27,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:29,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:29,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:29,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:30,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:30,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 18:44:30,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:44:30,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:44:30,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:30,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:30,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:44:30,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:44:30,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 18:44:30,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:31,919 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:44:31,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:44:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:31,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:31,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:31,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:44:31,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:44:31,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:44:31,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:31,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:31,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:44:31,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:44:31,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:44:31,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:44:31,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422424854] [2020-10-28 18:44:31,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:44:31,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:44:31,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999227003] [2020-10-28 18:44:31,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:44:31,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:44:31,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:44:31,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:44:31,997 INFO L87 Difference]: Start difference. First operand 1982 states and 2827 transitions. Second operand 8 states. [2020-10-28 18:44:33,780 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 508 [2020-10-28 18:44:38,561 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 504 [2020-10-28 18:44:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:44:40,628 INFO L93 Difference]: Finished difference Result 5460 states and 8090 transitions. [2020-10-28 18:44:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:44:40,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-28 18:44:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:44:40,638 INFO L225 Difference]: With dead ends: 5460 [2020-10-28 18:44:40,638 INFO L226 Difference]: Without dead ends: 4315 [2020-10-28 18:44:40,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:44:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2020-10-28 18:44:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 1982. [2020-10-28 18:44:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1982 states. [2020-10-28 18:44:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2825 transitions. [2020-10-28 18:44:40,991 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2825 transitions. Word has length 96 [2020-10-28 18:44:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:44:40,991 INFO L481 AbstractCegarLoop]: Abstraction has 1982 states and 2825 transitions. [2020-10-28 18:44:40,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:44:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2825 transitions. [2020-10-28 18:44:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 18:44:40,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:44:40,994 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] [2020-10-28 18:44:40,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:44:40,995 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:44:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:44:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash 960350069, now seen corresponding path program 1 times [2020-10-28 18:44:40,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:44:40,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928162000] [2020-10-28 18:44:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:44:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:41,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:41,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:41,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:41,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:44,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:44,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:45,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:45,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:46,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:46,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 18:44:46,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:44:46,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:44:46,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:46,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:46,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:44:46,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:44:46,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:44:46,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:47,894 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:44:47,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:44:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:47,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:47,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:47,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:44:47,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:44:47,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:44:47,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:47,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:47,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:44:47,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:44:47,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:44:47,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:44:47,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928162000] [2020-10-28 18:44:47,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:44:47,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:44:47,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846233664] [2020-10-28 18:44:47,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:44:47,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:44:47,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:44:47,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:44:47,963 INFO L87 Difference]: Start difference. First operand 1982 states and 2825 transitions. Second operand 8 states.