/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:57:50,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:57:50,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:57:50,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:57:50,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:57:50,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:57:50,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:57:50,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:57:50,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:57:50,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:57:50,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:57:50,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:57:50,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:57:50,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:57:50,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:57:50,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:57:50,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:57:50,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:57:50,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:57:50,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:57:50,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:57:50,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:57:50,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:57:50,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:57:50,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:57:50,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:57:50,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:57:50,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:57:50,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:57:50,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:57:50,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:57:50,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:57:50,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:57:50,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:57:50,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:57:50,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:57:50,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:57:50,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:57:50,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:57:50,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:57:50,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:57:50,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:57:50,585 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:57:50,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:57:50,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:57:50,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:57:50,590 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:57:50,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:57:50,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:57:50,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:57:50,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:57:50,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:57:50,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:57:50,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:57:50,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:57:50,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:57:50,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:57:50,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:57:50,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:57:50,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:57:50,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:57:50,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:57:50,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:57:50,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:57:50,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:57:50,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:57:50,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:57:50,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:57:50,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:57:50,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:57:50,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:57:50,596 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:57:50,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:57:51,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:57:51,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:57:51,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:57:51,007 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:57:51,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 05:57:51,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed25288e9/46687f5d5fc4434c93779a286fc03391/FLAGfacae4c1a [2020-10-27 05:57:51,911 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:57:51,912 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 05:57:51,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed25288e9/46687f5d5fc4434c93779a286fc03391/FLAGfacae4c1a [2020-10-27 05:57:52,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed25288e9/46687f5d5fc4434c93779a286fc03391 [2020-10-27 05:57:52,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:57:52,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:57:52,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:57:52,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:57:52,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:57:52,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:57:52" (1/1) ... [2020-10-27 05:57:52,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44be62ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52, skipping insertion in model container [2020-10-27 05:57:52,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:57:52" (1/1) ... [2020-10-27 05:57:52,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:57:52,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:57:52,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:57:52,596 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:57:52,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:57:52,717 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:57:52,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52 WrapperNode [2020-10-27 05:57:52,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:57:52,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:57:52,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:57:52,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:57:52,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52" (1/1) ... [2020-10-27 05:57:52,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52" (1/1) ... [2020-10-27 05:57:52,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52" (1/1) ... [2020-10-27 05:57:52,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52" (1/1) ... [2020-10-27 05:57:52,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52" (1/1) ... [2020-10-27 05:57:52,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52" (1/1) ... [2020-10-27 05:57:52,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52" (1/1) ... [2020-10-27 05:57:52,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:57:52,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:57:52,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:57:52,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:57:52,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:57:52,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:57:52,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:57:52,941 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:57:52,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:57:52,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:57:52,942 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:57:52,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:57:52,943 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:57:52,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:57:52,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:57:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:57:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:57:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:57:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:57:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:57:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:57:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:57:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:57:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:57:52,948 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:57:52,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:57:52,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:57:52,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:57:52,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:57:52,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:57:52,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:57:52,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:57:54,085 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:57:54,085 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:57:54,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:57:54 BoogieIcfgContainer [2020-10-27 05:57:54,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:57:54,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:57:54,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:57:54,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:57:54,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:57:52" (1/3) ... [2020-10-27 05:57:54,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e34f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:57:54, skipping insertion in model container [2020-10-27 05:57:54,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:57:52" (2/3) ... [2020-10-27 05:57:54,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e34f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:57:54, skipping insertion in model container [2020-10-27 05:57:54,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:57:54" (3/3) ... [2020-10-27 05:57:54,100 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 05:57:54,112 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:57:54,118 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:57:54,130 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:57:54,160 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:57:54,160 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:57:54,160 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:57:54,160 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:57:54,160 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:57:54,161 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:57:54,161 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:57:54,161 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:57:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-27 05:57:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:57:54,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:54,197 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] [2020-10-27 05:57:54,198 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1233459878, now seen corresponding path program 1 times [2020-10-27 05:57:54,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:54,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694811310] [2020-10-27 05:57:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:54,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:54,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:55,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:55,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:57,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:57,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:57:57,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:57:57,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2900 [2020-10-27 05:57:57,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:57:57,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 05:57:57,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 05:57:57,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:57:58,097 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:57:58,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:58,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:58,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:58,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:58,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:58,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:57:58,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:58,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:57:58,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694811310] [2020-10-27 05:57:58,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:58,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:57:58,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998848767] [2020-10-27 05:57:58,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:57:58,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:58,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:57:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:57:58,273 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2020-10-27 05:57:58,788 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:57:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:59,707 INFO L93 Difference]: Finished difference Result 324 states and 542 transitions. [2020-10-27 05:57:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:57:59,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 05:57:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:59,725 INFO L225 Difference]: With dead ends: 324 [2020-10-27 05:57:59,726 INFO L226 Difference]: Without dead ends: 219 [2020-10-27 05:57:59,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-27 05:57:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-10-27 05:57:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-27 05:57:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 334 transitions. [2020-10-27 05:57:59,846 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 334 transitions. Word has length 67 [2020-10-27 05:57:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:59,848 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 334 transitions. [2020-10-27 05:57:59,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:57:59,848 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 334 transitions. [2020-10-27 05:57:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:57:59,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:59,860 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] [2020-10-27 05:57:59,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:57:59,861 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:59,864 INFO L82 PathProgramCache]: Analyzing trace with hash -541488923, now seen corresponding path program 1 times [2020-10-27 05:57:59,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:59,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156824931] [2020-10-27 05:57:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:59,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:00,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:00,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:00,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:02,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:04,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:04,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:58:04,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:58:04,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:58:04,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:04,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:04,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:58:04,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:58:04,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:58:05,444 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:58:05,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:05,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:05,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:05,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:05,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:05,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:58:05,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:05,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:05,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:05,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:05,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:58:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:05,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156824931] [2020-10-27 05:58:05,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:05,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:05,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816237054] [2020-10-27 05:58:05,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:05,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:05,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:05,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:05,528 INFO L87 Difference]: Start difference. First operand 216 states and 334 transitions. Second operand 5 states. [2020-10-27 05:58:07,023 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:58:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:07,111 INFO L93 Difference]: Finished difference Result 618 states and 957 transitions. [2020-10-27 05:58:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:58:07,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-27 05:58:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:07,117 INFO L225 Difference]: With dead ends: 618 [2020-10-27 05:58:07,117 INFO L226 Difference]: Without dead ends: 415 [2020-10-27 05:58:07,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:58:07,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-27 05:58:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 412. [2020-10-27 05:58:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-27 05:58:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 635 transitions. [2020-10-27 05:58:07,188 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 635 transitions. Word has length 69 [2020-10-27 05:58:07,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:07,189 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 635 transitions. [2020-10-27 05:58:07,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:07,189 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 635 transitions. [2020-10-27 05:58:07,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:58:07,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:07,191 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] [2020-10-27 05:58:07,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:58:07,192 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:07,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1857451464, now seen corresponding path program 1 times [2020-10-27 05:58:07,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:07,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178406867] [2020-10-27 05:58:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:07,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:07,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:07,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:07,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:07,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:08,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:12,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:12,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:58:12,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:58:12,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4809 [2020-10-27 05:58:12,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:12,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:12,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:58:12,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:58:12,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:12,415 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:58:12,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:12,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:12,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:12,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:12,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:12,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:58:12,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:12,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:12,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:12,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:12,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:58:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:12,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178406867] [2020-10-27 05:58:12,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:12,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:12,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399453244] [2020-10-27 05:58:12,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:12,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:12,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:12,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:12,471 INFO L87 Difference]: Start difference. First operand 412 states and 635 transitions. Second operand 5 states. [2020-10-27 05:58:13,653 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:58:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:13,744 INFO L93 Difference]: Finished difference Result 1194 states and 1842 transitions. [2020-10-27 05:58:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:58:13,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-27 05:58:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:13,754 INFO L225 Difference]: With dead ends: 1194 [2020-10-27 05:58:13,755 INFO L226 Difference]: Without dead ends: 796 [2020-10-27 05:58:13,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:58:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2020-10-27 05:58:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 793. [2020-10-27 05:58:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2020-10-27 05:58:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1215 transitions. [2020-10-27 05:58:13,843 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1215 transitions. Word has length 70 [2020-10-27 05:58:13,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:13,845 INFO L481 AbstractCegarLoop]: Abstraction has 793 states and 1215 transitions. [2020-10-27 05:58:13,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1215 transitions. [2020-10-27 05:58:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:58:13,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:13,850 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] [2020-10-27 05:58:13,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:58:13,851 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:13,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1832163439, now seen corresponding path program 1 times [2020-10-27 05:58:13,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:13,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380656287] [2020-10-27 05:58:13,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:13,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:13,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:14,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:14,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:14,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:16,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:18,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:18,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:58:18,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:58:18,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:58:18,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:18,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:18,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:58:18,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:58:18,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 05:58:19,465 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:58:19,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:19,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:19,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:19,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:19,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:19,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:58:19,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:19,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:19,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:19,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:19,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:19,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380656287] [2020-10-27 05:58:19,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:19,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:19,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475414316] [2020-10-27 05:58:19,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:19,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:19,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:19,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:19,520 INFO L87 Difference]: Start difference. First operand 793 states and 1215 transitions. Second operand 5 states. [2020-10-27 05:58:20,878 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:58:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:21,037 INFO L93 Difference]: Finished difference Result 2231 states and 3407 transitions. [2020-10-27 05:58:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:58:21,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-27 05:58:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:21,047 INFO L225 Difference]: With dead ends: 2231 [2020-10-27 05:58:21,047 INFO L226 Difference]: Without dead ends: 1504 [2020-10-27 05:58:21,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:58:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2020-10-27 05:58:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1501. [2020-10-27 05:58:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1501 states. [2020-10-27 05:58:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2281 transitions. [2020-10-27 05:58:21,166 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2281 transitions. Word has length 70 [2020-10-27 05:58:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:21,167 INFO L481 AbstractCegarLoop]: Abstraction has 1501 states and 2281 transitions. [2020-10-27 05:58:21,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2281 transitions. [2020-10-27 05:58:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:58:21,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:21,171 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] [2020-10-27 05:58:21,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:58:21,171 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1224088596, now seen corresponding path program 1 times [2020-10-27 05:58:21,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:21,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494298946] [2020-10-27 05:58:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:21,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:21,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:21,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:21,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:21,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:22,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:23,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:26,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:26,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:58:26,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:58:26,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 05:58:26,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:26,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:26,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:58:26,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:58:26,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:26,703 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:58:26,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:26,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:26,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:26,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:26,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:26,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:58:26,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:26,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:58:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:26,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494298946] [2020-10-27 05:58:26,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:26,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:26,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375500215] [2020-10-27 05:58:26,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:26,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:26,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:26,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:26,779 INFO L87 Difference]: Start difference. First operand 1501 states and 2281 transitions. Second operand 5 states. [2020-10-27 05:58:27,266 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:58:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:28,546 INFO L93 Difference]: Finished difference Result 2602 states and 3947 transitions. [2020-10-27 05:58:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:58:28,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-27 05:58:28,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:28,560 INFO L225 Difference]: With dead ends: 2602 [2020-10-27 05:58:28,560 INFO L226 Difference]: Without dead ends: 1920 [2020-10-27 05:58:28,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:58:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-10-27 05:58:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1917. [2020-10-27 05:58:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-10-27 05:58:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2863 transitions. [2020-10-27 05:58:28,792 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2863 transitions. Word has length 71 [2020-10-27 05:58:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:28,793 INFO L481 AbstractCegarLoop]: Abstraction has 1917 states and 2863 transitions. [2020-10-27 05:58:28,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2863 transitions. [2020-10-27 05:58:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:58:28,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:28,798 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] [2020-10-27 05:58:28,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:58:28,799 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:28,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash -907378908, now seen corresponding path program 1 times [2020-10-27 05:58:28,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:28,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438373876] [2020-10-27 05:58:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:28,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:28,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:28,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:30,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:33,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:33,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:58:33,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:58:33,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4479 [2020-10-27 05:58:33,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:33,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:33,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:58:33,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 05:58:33,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:58:33,798 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:58:33,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:33,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:33,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:33,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:33,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:33,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:58:33,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:33,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:33,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438373876] [2020-10-27 05:58:33,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:33,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:33,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013123324] [2020-10-27 05:58:33,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:33,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:33,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:33,867 INFO L87 Difference]: Start difference. First operand 1917 states and 2863 transitions. Second operand 5 states. [2020-10-27 05:58:34,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:34,915 INFO L93 Difference]: Finished difference Result 3020 states and 4526 transitions. [2020-10-27 05:58:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:58:34,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-27 05:58:34,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:34,923 INFO L225 Difference]: With dead ends: 3020 [2020-10-27 05:58:34,923 INFO L226 Difference]: Without dead ends: 1142 [2020-10-27 05:58:34,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:58:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2020-10-27 05:58:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1142. [2020-10-27 05:58:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1142 states. [2020-10-27 05:58:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1720 transitions. [2020-10-27 05:58:35,020 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1720 transitions. Word has length 71 [2020-10-27 05:58:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:35,020 INFO L481 AbstractCegarLoop]: Abstraction has 1142 states and 1720 transitions. [2020-10-27 05:58:35,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1720 transitions. [2020-10-27 05:58:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:58:35,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:35,031 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] [2020-10-27 05:58:35,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:58:35,032 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:35,032 INFO L82 PathProgramCache]: Analyzing trace with hash 472235454, now seen corresponding path program 1 times [2020-10-27 05:58:35,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:35,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728317720] [2020-10-27 05:58:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:35,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:35,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:35,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:35,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:35,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:36,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:37,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:40,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:40,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:58:40,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:58:40,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 05:58:40,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:40,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:40,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:58:40,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:58:40,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:40,463 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:58:40,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:40,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:40,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:40,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:40,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:40,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:58:40,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:40,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:40,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728317720] [2020-10-27 05:58:40,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:40,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:40,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928228271] [2020-10-27 05:58:40,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:40,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:40,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:40,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:40,518 INFO L87 Difference]: Start difference. First operand 1142 states and 1720 transitions. Second operand 5 states. [2020-10-27 05:58:41,898 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:58:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:42,027 INFO L93 Difference]: Finished difference Result 3246 states and 4879 transitions. [2020-10-27 05:58:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:58:42,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-27 05:58:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:42,040 INFO L225 Difference]: With dead ends: 3246 [2020-10-27 05:58:42,040 INFO L226 Difference]: Without dead ends: 2164 [2020-10-27 05:58:42,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:58:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2020-10-27 05:58:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 2161. [2020-10-27 05:58:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2161 states. [2020-10-27 05:58:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 3217 transitions. [2020-10-27 05:58:42,242 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 3217 transitions. Word has length 71 [2020-10-27 05:58:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:42,243 INFO L481 AbstractCegarLoop]: Abstraction has 2161 states and 3217 transitions. [2020-10-27 05:58:42,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 3217 transitions. [2020-10-27 05:58:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:58:42,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:42,249 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] [2020-10-27 05:58:42,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:58:42,249 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:42,250 INFO L82 PathProgramCache]: Analyzing trace with hash -665676104, now seen corresponding path program 1 times [2020-10-27 05:58:42,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:42,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640866824] [2020-10-27 05:58:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:42,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:43,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:43,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:58:43,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:58:43,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-10-27 05:58:43,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:43,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:58:43,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 05:58:43,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 05:58:43,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:44,082 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:58:44,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:44,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:44,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:44,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:44,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:44,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:58:44,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:44,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:44,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:44,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:44,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:44,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640866824] [2020-10-27 05:58:44,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:44,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:58:44,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918114672] [2020-10-27 05:58:44,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:58:44,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:44,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:58:44,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:58:44,130 INFO L87 Difference]: Start difference. First operand 2161 states and 3217 transitions. Second operand 4 states. [2020-10-27 05:58:44,502 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:58:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:45,484 INFO L93 Difference]: Finished difference Result 5255 states and 8173 transitions. [2020-10-27 05:58:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:58:45,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-27 05:58:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:45,507 INFO L225 Difference]: With dead ends: 5255 [2020-10-27 05:58:45,507 INFO L226 Difference]: Without dead ends: 3616 [2020-10-27 05:58:45,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2020-10-27 05:58:45,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 3613. [2020-10-27 05:58:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3613 states. [2020-10-27 05:58:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 5517 transitions. [2020-10-27 05:58:45,853 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 5517 transitions. Word has length 71 [2020-10-27 05:58:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:45,853 INFO L481 AbstractCegarLoop]: Abstraction has 3613 states and 5517 transitions. [2020-10-27 05:58:45,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:58:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 5517 transitions. [2020-10-27 05:58:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:58:45,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:45,860 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] [2020-10-27 05:58:45,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:58:45,860 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:45,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2078871112, now seen corresponding path program 1 times [2020-10-27 05:58:45,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:45,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751988545] [2020-10-27 05:58:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:45,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:45,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:46,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:46,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:46,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:46,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:48,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:48,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:58:48,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:58:48,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2838 [2020-10-27 05:58:48,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:58:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:58:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:49,169 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:58:49,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:49,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:49,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:49,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:49,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:49,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:58:49,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:49,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:49,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:49,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:49,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:49,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751988545] [2020-10-27 05:58:49,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:49,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:49,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790967768] [2020-10-27 05:58:49,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:49,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:49,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:49,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:49,224 INFO L87 Difference]: Start difference. First operand 3613 states and 5517 transitions. Second operand 5 states. [2020-10-27 05:58:50,809 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:58:51,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:51,120 INFO L93 Difference]: Finished difference Result 9975 states and 15410 transitions. [2020-10-27 05:58:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:58:51,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-27 05:58:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:51,166 INFO L225 Difference]: With dead ends: 9975 [2020-10-27 05:58:51,166 INFO L226 Difference]: Without dead ends: 6884 [2020-10-27 05:58:51,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:58:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6884 states. [2020-10-27 05:58:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6884 to 6881. [2020-10-27 05:58:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6881 states. [2020-10-27 05:58:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6881 states to 6881 states and 10382 transitions. [2020-10-27 05:58:51,884 INFO L78 Accepts]: Start accepts. Automaton has 6881 states and 10382 transitions. Word has length 74 [2020-10-27 05:58:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:51,884 INFO L481 AbstractCegarLoop]: Abstraction has 6881 states and 10382 transitions. [2020-10-27 05:58:51,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6881 states and 10382 transitions. [2020-10-27 05:58:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:58:51,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:51,905 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] [2020-10-27 05:58:51,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:58:51,906 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:51,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:51,907 INFO L82 PathProgramCache]: Analyzing trace with hash -270693217, now seen corresponding path program 1 times [2020-10-27 05:58:51,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:51,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552666353] [2020-10-27 05:58:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:51,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:51,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:53,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:55,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:55,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:58:55,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:58:55,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3476 [2020-10-27 05:58:55,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:58:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:58:55,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:55,879 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:58:55,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:55,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:55,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:55,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:55,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:55,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:58:55,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:55,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:55,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:55,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:55,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:55,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552666353] [2020-10-27 05:58:55,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:55,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:55,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686276888] [2020-10-27 05:58:55,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:55,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:55,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:55,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:55,947 INFO L87 Difference]: Start difference. First operand 6881 states and 10382 transitions. Second operand 5 states. [2020-10-27 05:58:57,712 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:58:58,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:58,225 INFO L93 Difference]: Finished difference Result 16919 states and 25858 transitions. [2020-10-27 05:58:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:58:58,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-27 05:58:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:58,275 INFO L225 Difference]: With dead ends: 16919 [2020-10-27 05:58:58,275 INFO L226 Difference]: Without dead ends: 11028 [2020-10-27 05:58:58,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:58:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11028 states. [2020-10-27 05:58:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11028 to 11025. [2020-10-27 05:58:59,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11025 states. [2020-10-27 05:58:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11025 states to 11025 states and 16430 transitions. [2020-10-27 05:58:59,542 INFO L78 Accepts]: Start accepts. Automaton has 11025 states and 16430 transitions. Word has length 75 [2020-10-27 05:58:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:59,542 INFO L481 AbstractCegarLoop]: Abstraction has 11025 states and 16430 transitions. [2020-10-27 05:58:59,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11025 states and 16430 transitions. [2020-10-27 05:58:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:58:59,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:59,562 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] [2020-10-27 05:58:59,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:58:59,562 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:59,563 INFO L82 PathProgramCache]: Analyzing trace with hash 80388086, now seen corresponding path program 1 times [2020-10-27 05:58:59,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:59,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583497803] [2020-10-27 05:58:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:59,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:59,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:59,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:00,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:03,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:03,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:59:03,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:59:03,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4086 [2020-10-27 05:59:03,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:59:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:59:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 05:59:03,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:04,085 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:59:04,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:04,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:04,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:04,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:04,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:59:04,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:04,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583497803] [2020-10-27 05:59:04,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:04,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:59:04,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246951933] [2020-10-27 05:59:04,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:59:04,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:04,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:59:04,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:04,135 INFO L87 Difference]: Start difference. First operand 11025 states and 16430 transitions. Second operand 5 states. [2020-10-27 05:59:05,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:05,594 INFO L93 Difference]: Finished difference Result 18136 states and 26984 transitions. [2020-10-27 05:59:05,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:59:05,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-27 05:59:05,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:05,609 INFO L225 Difference]: With dead ends: 18136 [2020-10-27 05:59:05,609 INFO L226 Difference]: Without dead ends: 7177 [2020-10-27 05:59:05,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:59:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2020-10-27 05:59:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 7176. [2020-10-27 05:59:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7176 states. [2020-10-27 05:59:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 10640 transitions. [2020-10-27 05:59:06,271 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 10640 transitions. Word has length 75 [2020-10-27 05:59:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:06,271 INFO L481 AbstractCegarLoop]: Abstraction has 7176 states and 10640 transitions. [2020-10-27 05:59:06,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:59:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 10640 transitions. [2020-10-27 05:59:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:59:06,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:06,282 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] [2020-10-27 05:59:06,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:59:06,282 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:06,283 INFO L82 PathProgramCache]: Analyzing trace with hash 555156786, now seen corresponding path program 1 times [2020-10-27 05:59:06,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:06,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648664878] [2020-10-27 05:59:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:06,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:06,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:06,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:06,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:06,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:06,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:07,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:08,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:11,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:11,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:59:11,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:59:11,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:59:11,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:11,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:59:11,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:59:11,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:59:11,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:11,718 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:59:11,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:11,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:11,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:11,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:11,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:11,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:59:11,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:11,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:11,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:11,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:11,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648664878] [2020-10-27 05:59:11,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:11,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:59:11,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778060630] [2020-10-27 05:59:11,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:59:11,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:11,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:59:11,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:11,763 INFO L87 Difference]: Start difference. First operand 7176 states and 10640 transitions. Second operand 5 states. [2020-10-27 05:59:12,160 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:59:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:14,153 INFO L93 Difference]: Finished difference Result 14454 states and 21318 transitions. [2020-10-27 05:59:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:59:14,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-27 05:59:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:14,179 INFO L225 Difference]: With dead ends: 14454 [2020-10-27 05:59:14,180 INFO L226 Difference]: Without dead ends: 8980 [2020-10-27 05:59:14,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:59:14,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8980 states. [2020-10-27 05:59:15,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8980 to 8977. [2020-10-27 05:59:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8977 states. [2020-10-27 05:59:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8977 states to 8977 states and 13005 transitions. [2020-10-27 05:59:15,145 INFO L78 Accepts]: Start accepts. Automaton has 8977 states and 13005 transitions. Word has length 75 [2020-10-27 05:59:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:15,145 INFO L481 AbstractCegarLoop]: Abstraction has 8977 states and 13005 transitions. [2020-10-27 05:59:15,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:59:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 8977 states and 13005 transitions. [2020-10-27 05:59:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:59:15,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:15,158 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] [2020-10-27 05:59:15,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:59:15,158 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:15,159 INFO L82 PathProgramCache]: Analyzing trace with hash -523814198, now seen corresponding path program 1 times [2020-10-27 05:59:15,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:15,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064838294] [2020-10-27 05:59:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:15,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:15,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:15,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:15,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:15,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:15,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:16,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:16,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:59:16,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:59:16,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1692 [2020-10-27 05:59:16,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:59:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 05:59:16,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:59:16,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:17,334 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:59:17,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:17,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:17,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:17,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:17,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:17,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:59:17,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:17,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:17,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:17,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:17,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:17,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064838294] [2020-10-27 05:59:17,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:17,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:59:17,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556990335] [2020-10-27 05:59:17,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:59:17,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:59:17,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:59:17,378 INFO L87 Difference]: Start difference. First operand 8977 states and 13005 transitions. Second operand 4 states. [2020-10-27 05:59:17,749 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:59:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:19,661 INFO L93 Difference]: Finished difference Result 22478 states and 33718 transitions. [2020-10-27 05:59:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:59:19,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-27 05:59:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:19,694 INFO L225 Difference]: With dead ends: 22478 [2020-10-27 05:59:19,695 INFO L226 Difference]: Without dead ends: 15145 [2020-10-27 05:59:19,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15145 states. [2020-10-27 05:59:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15145 to 15142. [2020-10-27 05:59:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15142 states. [2020-10-27 05:59:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15142 states to 15142 states and 22376 transitions. [2020-10-27 05:59:21,274 INFO L78 Accepts]: Start accepts. Automaton has 15142 states and 22376 transitions. Word has length 75 [2020-10-27 05:59:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:21,275 INFO L481 AbstractCegarLoop]: Abstraction has 15142 states and 22376 transitions. [2020-10-27 05:59:21,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:59:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 15142 states and 22376 transitions. [2020-10-27 05:59:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:59:21,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:21,286 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] [2020-10-27 05:59:21,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:59:21,286 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:21,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1480497188, now seen corresponding path program 1 times [2020-10-27 05:59:21,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:21,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722200694] [2020-10-27 05:59:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:21,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:22,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:22,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:59:22,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:59:22,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1566 [2020-10-27 05:59:22,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:22,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:59:22,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 05:59:22,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:59:22,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:23,270 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:59:23,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:23,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:23,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:23,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:23,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:23,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:59:23,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:23,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:23,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:23,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:23,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:23,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722200694] [2020-10-27 05:59:23,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:23,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:59:23,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998881421] [2020-10-27 05:59:23,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:59:23,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:23,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:59:23,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:59:23,303 INFO L87 Difference]: Start difference. First operand 15142 states and 22376 transitions. Second operand 6 states. [2020-10-27 05:59:23,784 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:59:25,681 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:59:26,069 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:59:27,242 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:59:27,588 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:59:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:30,954 INFO L93 Difference]: Finished difference Result 74399 states and 113347 transitions. [2020-10-27 05:59:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:59:30,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-27 05:59:30,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:31,085 INFO L225 Difference]: With dead ends: 74399 [2020-10-27 05:59:31,085 INFO L226 Difference]: Without dead ends: 60901 [2020-10-27 05:59:31,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:59:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60901 states. [2020-10-27 05:59:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60901 to 28101. [2020-10-27 05:59:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28101 states. [2020-10-27 05:59:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28101 states to 28101 states and 41967 transitions. [2020-10-27 05:59:34,757 INFO L78 Accepts]: Start accepts. Automaton has 28101 states and 41967 transitions. Word has length 79 [2020-10-27 05:59:34,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:34,757 INFO L481 AbstractCegarLoop]: Abstraction has 28101 states and 41967 transitions. [2020-10-27 05:59:34,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:59:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 28101 states and 41967 transitions. [2020-10-27 05:59:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:59:34,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:34,773 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] [2020-10-27 05:59:34,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:59:34,774 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:34,774 INFO L82 PathProgramCache]: Analyzing trace with hash -561036809, now seen corresponding path program 1 times [2020-10-27 05:59:34,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:34,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286094169] [2020-10-27 05:59:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:34,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:34,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:34,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:34,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:35,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:35,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:35,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:37,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:37,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:59:37,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:59:37,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2903 [2020-10-27 05:59:37,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:37,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:59:37,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 05:59:37,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:59:37,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:38,049 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:59:38,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:38,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:38,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:38,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:38,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:38,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:59:38,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:38,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:38,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286094169] [2020-10-27 05:59:38,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:38,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:59:38,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110629229] [2020-10-27 05:59:38,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:59:38,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:59:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:38,085 INFO L87 Difference]: Start difference. First operand 28101 states and 41967 transitions. Second operand 5 states. [2020-10-27 05:59:38,463 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:59:40,743 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:59:46,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:46,544 INFO L93 Difference]: Finished difference Result 95644 states and 144949 transitions. [2020-10-27 05:59:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:59:46,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-27 05:59:46,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:46,655 INFO L225 Difference]: With dead ends: 95644 [2020-10-27 05:59:46,655 INFO L226 Difference]: Without dead ends: 69187 [2020-10-27 05:59:46,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:59:46,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69187 states. [2020-10-27 05:59:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69187 to 48466. [2020-10-27 05:59:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48466 states. [2020-10-27 05:59:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48466 states to 48466 states and 72594 transitions. [2020-10-27 05:59:52,404 INFO L78 Accepts]: Start accepts. Automaton has 48466 states and 72594 transitions. Word has length 80 [2020-10-27 05:59:52,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:52,404 INFO L481 AbstractCegarLoop]: Abstraction has 48466 states and 72594 transitions. [2020-10-27 05:59:52,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:59:52,404 INFO L276 IsEmpty]: Start isEmpty. Operand 48466 states and 72594 transitions. [2020-10-27 05:59:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:59:52,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:52,424 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] [2020-10-27 05:59:52,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:59:52,425 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2143676755, now seen corresponding path program 1 times [2020-10-27 05:59:52,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:52,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372622402] [2020-10-27 05:59:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:52,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:52,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:52,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:52,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:52,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:52,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:53,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:54,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:54,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:57,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:57,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:59:57,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:59:57,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:59:57,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:59:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:59:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:59:57,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:57,843 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:59:57,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:57,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:57,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:57,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:57,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:57,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:59:57,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:59:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:59:57,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:57,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372622402] [2020-10-27 05:59:57,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:57,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:59:57,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896627548] [2020-10-27 05:59:57,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:59:57,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:57,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:59:57,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:59:57,892 INFO L87 Difference]: Start difference. First operand 48466 states and 72594 transitions. Second operand 8 states. [2020-10-27 05:59:58,300 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 06:00:01,038 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 06:00:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:10,841 INFO L93 Difference]: Finished difference Result 145621 states and 218881 transitions. [2020-10-27 06:00:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 06:00:10,841 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-10-27 06:00:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:11,020 INFO L225 Difference]: With dead ends: 145621 [2020-10-27 06:00:11,020 INFO L226 Difference]: Without dead ends: 98697 [2020-10-27 06:00:11,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-27 06:00:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98697 states. [2020-10-27 06:00:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98697 to 48546. [2020-10-27 06:00:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48546 states. [2020-10-27 06:00:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48546 states to 48546 states and 72059 transitions. [2020-10-27 06:00:17,204 INFO L78 Accepts]: Start accepts. Automaton has 48546 states and 72059 transitions. Word has length 80 [2020-10-27 06:00:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:17,204 INFO L481 AbstractCegarLoop]: Abstraction has 48546 states and 72059 transitions. [2020-10-27 06:00:17,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 06:00:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 48546 states and 72059 transitions. [2020-10-27 06:00:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 06:00:17,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:17,224 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] [2020-10-27 06:00:17,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 06:00:17,224 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:17,224 INFO L82 PathProgramCache]: Analyzing trace with hash -981383045, now seen corresponding path program 1 times [2020-10-27 06:00:17,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:17,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583823780] [2020-10-27 06:00:17,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:17,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:17,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:17,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:17,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:17,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:18,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:18,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:19,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:22,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:22,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 06:00:22,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 06:00:22,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 06:00:22,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:00:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 06:00:22,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:22,668 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 06:00:22,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:22,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:22,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:22,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:22,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:22,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 06:00:22,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:22,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:22,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:22,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:22,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583823780] [2020-10-27 06:00:22,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:22,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:22,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014206657] [2020-10-27 06:00:22,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:22,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:22,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:22,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:22,711 INFO L87 Difference]: Start difference. First operand 48546 states and 72059 transitions. Second operand 5 states. [2020-10-27 06:00:23,106 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 06:00:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:30,772 INFO L93 Difference]: Finished difference Result 85144 states and 126442 transitions. [2020-10-27 06:00:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:00:30,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-27 06:00:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:30,841 INFO L225 Difference]: With dead ends: 85144 [2020-10-27 06:00:30,841 INFO L226 Difference]: Without dead ends: 54479 [2020-10-27 06:00:31,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:00:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54479 states. [2020-10-27 06:00:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54479 to 54476. [2020-10-27 06:00:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54476 states. [2020-10-27 06:00:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54476 states to 54476 states and 79941 transitions. [2020-10-27 06:00:37,648 INFO L78 Accepts]: Start accepts. Automaton has 54476 states and 79941 transitions. Word has length 80 [2020-10-27 06:00:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:37,648 INFO L481 AbstractCegarLoop]: Abstraction has 54476 states and 79941 transitions. [2020-10-27 06:00:37,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:00:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 54476 states and 79941 transitions. [2020-10-27 06:00:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 06:00:37,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:37,664 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] [2020-10-27 06:00:37,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 06:00:37,664 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:37,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1747359950, now seen corresponding path program 1 times [2020-10-27 06:00:37,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:37,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59563870] [2020-10-27 06:00:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:37,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:37,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:37,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:37,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:37,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:40,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:42,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:42,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 06:00:42,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:00:42,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 06:00:42,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:42,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:42,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 06:00:42,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 06:00:42,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:43,210 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 06:00:43,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:43,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:43,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:43,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:43,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:43,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:00:43,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:43,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:43,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59563870] [2020-10-27 06:00:43,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:43,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:43,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808301896] [2020-10-27 06:00:43,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:43,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:43,240 INFO L87 Difference]: Start difference. First operand 54476 states and 79941 transitions. Second operand 5 states. [2020-10-27 06:00:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:49,659 INFO L93 Difference]: Finished difference Result 68405 states and 99987 transitions. [2020-10-27 06:00:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:00:49,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-27 06:00:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:49,713 INFO L225 Difference]: With dead ends: 68405 [2020-10-27 06:00:49,713 INFO L226 Difference]: Without dead ends: 47286 [2020-10-27 06:00:49,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:00:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47286 states. [2020-10-27 06:00:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47286 to 47286. [2020-10-27 06:00:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47286 states. [2020-10-27 06:00:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47286 states to 47286 states and 69391 transitions. [2020-10-27 06:00:55,566 INFO L78 Accepts]: Start accepts. Automaton has 47286 states and 69391 transitions. Word has length 80 [2020-10-27 06:00:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:55,567 INFO L481 AbstractCegarLoop]: Abstraction has 47286 states and 69391 transitions. [2020-10-27 06:00:55,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:00:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 47286 states and 69391 transitions. [2020-10-27 06:00:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 06:00:55,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:55,582 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] [2020-10-27 06:00:55,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 06:00:55,583 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1869950786, now seen corresponding path program 1 times [2020-10-27 06:00:55,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:55,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228761643] [2020-10-27 06:00:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:55,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:55,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:55,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:55,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:56,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:57,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:57,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 06:00:57,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:00:57,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1786 [2020-10-27 06:00:57,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:57,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:57,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 06:00:57,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 06:00:57,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:57,778 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 06:00:57,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:57,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:57,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:57,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:57,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:57,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:00:57,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:57,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:57,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228761643] [2020-10-27 06:00:57,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:57,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:57,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462360100] [2020-10-27 06:00:57,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:57,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:57,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:57,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:57,812 INFO L87 Difference]: Start difference. First operand 47286 states and 69391 transitions. Second operand 5 states. [2020-10-27 06:00:58,209 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 06:01:00,639 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 06:01:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:01:07,352 INFO L93 Difference]: Finished difference Result 88180 states and 130356 transitions. [2020-10-27 06:01:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 06:01:07,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-27 06:01:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:01:07,442 INFO L225 Difference]: With dead ends: 88180 [2020-10-27 06:01:07,442 INFO L226 Difference]: Without dead ends: 65478 [2020-10-27 06:01:07,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:01:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65478 states. [2020-10-27 06:01:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65478 to 65472. [2020-10-27 06:01:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65472 states. [2020-10-27 06:01:15,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65472 states to 65472 states and 95775 transitions. [2020-10-27 06:01:15,831 INFO L78 Accepts]: Start accepts. Automaton has 65472 states and 95775 transitions. Word has length 81 [2020-10-27 06:01:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:01:15,832 INFO L481 AbstractCegarLoop]: Abstraction has 65472 states and 95775 transitions. [2020-10-27 06:01:15,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:01:15,832 INFO L276 IsEmpty]: Start isEmpty. Operand 65472 states and 95775 transitions. [2020-10-27 06:01:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 06:01:15,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:01:15,847 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] [2020-10-27 06:01:15,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 06:01:15,847 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:01:15,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:01:15,848 INFO L82 PathProgramCache]: Analyzing trace with hash -68125880, now seen corresponding path program 1 times [2020-10-27 06:01:15,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:01:15,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121464954] [2020-10-27 06:01:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:01:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:15,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:16,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:16,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:16,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:16,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:16,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:17,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:17,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 06:01:17,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:01:17,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1842 [2020-10-27 06:01:17,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:17,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:01:17,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 06:01:17,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 06:01:17,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:18,281 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 06:01:18,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:18,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:18,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:18,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:18,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:18,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:01:18,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:18,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:01:18,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:18,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:01:18,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:18,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121464954] [2020-10-27 06:01:18,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:18,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:01:18,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839432120] [2020-10-27 06:01:18,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:01:18,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:01:18,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:01:18,330 INFO L87 Difference]: Start difference. First operand 65472 states and 95775 transitions. Second operand 5 states. [2020-10-27 06:01:18,763 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 06:01:20,777 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 06:01:25,745 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 207