/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:20:44,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:20:44,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:20:44,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:20:44,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:20:44,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:20:44,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:20:44,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:20:44,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:20:44,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:20:44,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:20:44,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:20:44,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:20:44,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:20:44,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:20:44,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:20:44,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:20:44,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:20:44,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:20:44,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:20:44,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:20:44,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:20:44,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:20:44,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:20:44,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:20:44,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:20:44,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:20:44,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:20:44,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:20:44,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:20:44,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:20:44,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:20:44,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:20:44,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:20:44,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:20:44,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:20:44,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:20:44,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:20:44,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:20:44,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:20:44,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:20:44,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 19:20:44,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:20:44,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:20:44,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:20:44,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:20:44,558 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:20:44,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:20:44,558 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:20:44,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:20:44,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:20:44,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:20:44,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:20:44,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:20:44,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:20:44,564 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:20:44,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:20:44,565 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:20:44,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:20:44,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:20:44,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:20:44,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:20:44,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:20:44,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:20:44,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:20:44,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:20:44,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:20:44,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:20:44,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:20:44,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:20:44,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:20:44,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:20:45,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:20:45,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:20:45,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:20:45,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:20:45,058 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:20:45,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 19:20:45,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a6954907/2f2a0ece9c894b4d913a730897caaabc/FLAGe08459de7 [2020-10-28 19:20:46,121 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:20:46,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 19:20:46,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a6954907/2f2a0ece9c894b4d913a730897caaabc/FLAGe08459de7 [2020-10-28 19:20:46,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a6954907/2f2a0ece9c894b4d913a730897caaabc [2020-10-28 19:20:46,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:20:46,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:20:46,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:20:46,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:20:46,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:20:46,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:20:46" (1/1) ... [2020-10-28 19:20:46,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488c2fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:46, skipping insertion in model container [2020-10-28 19:20:46,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:20:46" (1/1) ... [2020-10-28 19:20:46,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:20:46,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:20:48,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:20:48,522 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:20:49,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:20:49,484 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:20:49,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:49 WrapperNode [2020-10-28 19:20:49,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:20:49,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:20:49,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:20:49,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:20:49,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:49" (1/1) ... [2020-10-28 19:20:49,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:49" (1/1) ... [2020-10-28 19:20:49,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:49" (1/1) ... [2020-10-28 19:20:49,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:49" (1/1) ... [2020-10-28 19:20:49,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:49" (1/1) ... [2020-10-28 19:20:49,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:49" (1/1) ... [2020-10-28 19:20:49,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:49" (1/1) ... [2020-10-28 19:20:49,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:20:49,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:20:49,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:20:49,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:20:49,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:20:49,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:20:49,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:20:49,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:20:49,857 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:20:49,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:20:49,858 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:20:49,858 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:20:49,858 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:20:49,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:20:49,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:20:49,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:20:49,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:20:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:20:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:20:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:20:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:20:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:20:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:20:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:20:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:20:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:20:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:20:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:20:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:20:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:20:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:20:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:20:49,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:20:49,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:20:53,766 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:20:53,767 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:20:53,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:20:53 BoogieIcfgContainer [2020-10-28 19:20:53,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:20:53,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:20:53,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:20:53,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:20:53,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:20:46" (1/3) ... [2020-10-28 19:20:53,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eed28c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:20:53, skipping insertion in model container [2020-10-28 19:20:53,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:49" (2/3) ... [2020-10-28 19:20:53,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eed28c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:20:53, skipping insertion in model container [2020-10-28 19:20:53,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:20:53" (3/3) ... [2020-10-28 19:20:53,781 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 19:20:53,819 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:20:53,826 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:20:53,840 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:20:53,876 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:20:53,876 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:20:53,876 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:20:53,876 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:20:53,877 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:20:53,877 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:20:53,877 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:20:53,877 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:20:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states. [2020-10-28 19:20:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:20:53,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:53,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:20:53,948 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1028546938, now seen corresponding path program 1 times [2020-10-28 19:20:53,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:53,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821787444] [2020-10-28 19:20:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:54,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:55,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:55,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:56,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:56,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:56,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:58,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:58,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:59,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:59,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:59,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:59,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:59,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:20:59,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:20:59,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-28 19:20:59,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:59,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:20:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 19:20:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-28 19:20:59,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:21:00,897 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:21:00,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:00,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:00,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:00,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:00,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 19:21:00,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:00,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:00,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:00,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:00,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:00,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:01,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821787444] [2020-10-28 19:21:01,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:01,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:21:01,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110042470] [2020-10-28 19:21:01,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:21:01,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:01,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:21:01,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:21:01,203 INFO L87 Difference]: Start difference. First operand 1020 states. Second operand 4 states. [2020-10-28 19:21:02,172 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 19:21:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:11,315 INFO L93 Difference]: Finished difference Result 1778 states and 3166 transitions. [2020-10-28 19:21:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:21:11,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 19:21:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:11,390 INFO L225 Difference]: With dead ends: 1778 [2020-10-28 19:21:11,390 INFO L226 Difference]: Without dead ends: 1472 [2020-10-28 19:21:11,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:11,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2020-10-28 19:21:11,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1469. [2020-10-28 19:21:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2020-10-28 19:21:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 2267 transitions. [2020-10-28 19:21:11,561 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 2267 transitions. Word has length 325 [2020-10-28 19:21:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:11,567 INFO L481 AbstractCegarLoop]: Abstraction has 1469 states and 2267 transitions. [2020-10-28 19:21:11,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:21:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 2267 transitions. [2020-10-28 19:21:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:21:11,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:11,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:21:11,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:21:11,589 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:11,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:11,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1524659108, now seen corresponding path program 1 times [2020-10-28 19:21:11,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:11,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679819178] [2020-10-28 19:21:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:12,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:12,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:12,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:12,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:13,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:13,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:13,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:13,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:13,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:14,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:14,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:14,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:14,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:15,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:16,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:16,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:21:16,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:21:16,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 19:21:16,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:16,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:21:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:21:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-28 19:21:16,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:18,354 WARN L193 SmtUtils]: Spent 980.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:21:18,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:18,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:18,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:18,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:18,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:18,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 19:21:18,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:18,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:18,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:18,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:18,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:18,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:18,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679819178] [2020-10-28 19:21:18,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:18,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:21:18,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287536323] [2020-10-28 19:21:18,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:21:18,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:18,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:21:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:18,732 INFO L87 Difference]: Start difference. First operand 1469 states and 2267 transitions. Second operand 5 states. [2020-10-28 19:21:28,965 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:21:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:31,959 INFO L93 Difference]: Finished difference Result 4319 states and 6655 transitions. [2020-10-28 19:21:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:21:31,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-28 19:21:31,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:31,978 INFO L225 Difference]: With dead ends: 4319 [2020-10-28 19:21:31,978 INFO L226 Difference]: Without dead ends: 2883 [2020-10-28 19:21:31,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:21:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2020-10-28 19:21:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2796. [2020-10-28 19:21:32,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2796 states. [2020-10-28 19:21:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 4304 transitions. [2020-10-28 19:21:32,158 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 4304 transitions. Word has length 325 [2020-10-28 19:21:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:32,159 INFO L481 AbstractCegarLoop]: Abstraction has 2796 states and 4304 transitions. [2020-10-28 19:21:32,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:21:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 4304 transitions. [2020-10-28 19:21:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 19:21:32,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:32,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:21:32,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:21:32,170 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:32,171 INFO L82 PathProgramCache]: Analyzing trace with hash 44944339, now seen corresponding path program 1 times [2020-10-28 19:21:32,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:32,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483271857] [2020-10-28 19:21:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:32,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:32,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:32,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:32,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:32,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:33,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:33,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:33,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:33,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:33,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:33,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:34,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:34,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:34,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:37,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:37,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 19:21:37,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:21:37,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-28 19:21:37,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:37,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:21:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:21:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-28 19:21:37,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:38,428 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:21:38,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:38,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:38,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:38,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:38,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:38,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 19:21:38,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:38,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:38,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:38,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:38,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:38,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:38,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483271857] [2020-10-28 19:21:38,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:38,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:21:38,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298174538] [2020-10-28 19:21:38,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:21:38,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:38,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:21:38,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:38,717 INFO L87 Difference]: Start difference. First operand 2796 states and 4304 transitions. Second operand 5 states. [2020-10-28 19:21:49,126 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:21:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:52,215 INFO L93 Difference]: Finished difference Result 8184 states and 12560 transitions. [2020-10-28 19:21:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:21:52,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-10-28 19:21:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:52,244 INFO L225 Difference]: With dead ends: 8184 [2020-10-28 19:21:52,245 INFO L226 Difference]: Without dead ends: 5480 [2020-10-28 19:21:52,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:21:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2020-10-28 19:21:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 5380. [2020-10-28 19:21:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5380 states. [2020-10-28 19:21:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 8245 transitions. [2020-10-28 19:21:52,593 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 8245 transitions. Word has length 327 [2020-10-28 19:21:52,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:52,593 INFO L481 AbstractCegarLoop]: Abstraction has 5380 states and 8245 transitions. [2020-10-28 19:21:52,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:21:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 8245 transitions. [2020-10-28 19:21:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-28 19:21:52,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:52,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:21:52,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:21:52,609 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:52,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1531460437, now seen corresponding path program 1 times [2020-10-28 19:21:52,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:52,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323929044] [2020-10-28 19:21:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:52,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:52,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:53,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:53,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:53,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:53,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:54,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:54,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:54,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:54,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:54,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:54,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:55,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:55,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:57,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:57,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-28 19:21:57,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:21:57,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 19:21:57,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:57,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:57,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:21:57,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:21:57,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 185 [2020-10-28 19:21:57,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:59,003 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:21:59,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:59,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:59,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:59,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:59,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:59,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:21:59,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:59,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:59,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:59,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323929044] [2020-10-28 19:21:59,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:59,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:21:59,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748886406] [2020-10-28 19:21:59,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:21:59,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:59,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:21:59,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:59,287 INFO L87 Difference]: Start difference. First operand 5380 states and 8245 transitions. Second operand 5 states. [2020-10-28 19:22:08,608 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:22:11,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:11,541 INFO L93 Difference]: Finished difference Result 15792 states and 24137 transitions. [2020-10-28 19:22:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:11,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-10-28 19:22:11,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:11,591 INFO L225 Difference]: With dead ends: 15792 [2020-10-28 19:22:11,591 INFO L226 Difference]: Without dead ends: 10504 [2020-10-28 19:22:11,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10504 states. [2020-10-28 19:22:12,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10504 to 10404. [2020-10-28 19:22:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10404 states. [2020-10-28 19:22:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10404 states to 10404 states and 15839 transitions. [2020-10-28 19:22:12,412 INFO L78 Accepts]: Start accepts. Automaton has 10404 states and 15839 transitions. Word has length 329 [2020-10-28 19:22:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:12,413 INFO L481 AbstractCegarLoop]: Abstraction has 10404 states and 15839 transitions. [2020-10-28 19:22:12,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 10404 states and 15839 transitions. [2020-10-28 19:22:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 19:22:12,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:12,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:22:12,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:22:12,440 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:12,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:12,441 INFO L82 PathProgramCache]: Analyzing trace with hash -606077046, now seen corresponding path program 1 times [2020-10-28 19:22:12,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:12,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838015595] [2020-10-28 19:22:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:12,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:12,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:12,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:12,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:13,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:13,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:13,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:13,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:13,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:13,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:13,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:14,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:14,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:17,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:17,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 19:22:17,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:22:17,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 19:22:17,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:17,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:17,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:17,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:17,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-28 19:22:17,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:18,624 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:22:18,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:18,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:18,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:18,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:18,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:18,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:22:18,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:18,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:18,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:18,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:18,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:18,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:22:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:22:18,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838015595] [2020-10-28 19:22:18,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:18,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:18,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995523526] [2020-10-28 19:22:18,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:18,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:18,903 INFO L87 Difference]: Start difference. First operand 10404 states and 15839 transitions. Second operand 5 states. [2020-10-28 19:22:28,645 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:22:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:31,613 INFO L93 Difference]: Finished difference Result 30686 states and 46623 transitions. [2020-10-28 19:22:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:31,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-28 19:22:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:31,684 INFO L225 Difference]: With dead ends: 30686 [2020-10-28 19:22:31,684 INFO L226 Difference]: Without dead ends: 20368 [2020-10-28 19:22:31,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20368 states. [2020-10-28 19:22:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20368 to 20283. [2020-10-28 19:22:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20283 states. [2020-10-28 19:22:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 30647 transitions. [2020-10-28 19:22:33,031 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 30647 transitions. Word has length 331 [2020-10-28 19:22:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:33,032 INFO L481 AbstractCegarLoop]: Abstraction has 20283 states and 30647 transitions. [2020-10-28 19:22:33,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 30647 transitions. [2020-10-28 19:22:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 19:22:33,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:33,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:22:33,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:22:33,078 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:33,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:33,079 INFO L82 PathProgramCache]: Analyzing trace with hash -156395112, now seen corresponding path program 1 times [2020-10-28 19:22:33,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:33,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77983000] [2020-10-28 19:22:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:33,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:33,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:33,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:33,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:33,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:33,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:33,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:33,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:34,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:34,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:34,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:38,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:38,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 19:22:38,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:22:38,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 19:22:38,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:38,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:38,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:38,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 19:22:38,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:22:39,317 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:22:39,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:39,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:39,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:39,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:39,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:39,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:22:39,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:39,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:39,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:22:39,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77983000] [2020-10-28 19:22:39,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:39,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:39,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696518889] [2020-10-28 19:22:39,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:39,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:39,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:39,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:39,541 INFO L87 Difference]: Start difference. First operand 20283 states and 30647 transitions. Second operand 5 states. [2020-10-28 19:22:51,304 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:22:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:54,950 INFO L93 Difference]: Finished difference Result 59287 states and 89291 transitions. [2020-10-28 19:22:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:54,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-10-28 19:22:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:55,048 INFO L225 Difference]: With dead ends: 59287 [2020-10-28 19:22:55,049 INFO L226 Difference]: Without dead ends: 39621 [2020-10-28 19:22:55,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39621 states. [2020-10-28 19:22:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39621 to 39507. [2020-10-28 19:22:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39507 states. [2020-10-28 19:22:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39507 states to 39507 states and 59287 transitions. [2020-10-28 19:22:57,947 INFO L78 Accepts]: Start accepts. Automaton has 39507 states and 59287 transitions. Word has length 333 [2020-10-28 19:22:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:57,947 INFO L481 AbstractCegarLoop]: Abstraction has 39507 states and 59287 transitions. [2020-10-28 19:22:57,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 39507 states and 59287 transitions. [2020-10-28 19:22:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-28 19:22:58,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:58,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:22:58,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:22:58,014 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:58,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1710534575, now seen corresponding path program 1 times [2020-10-28 19:22:58,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:58,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832975664] [2020-10-28 19:22:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:58,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:58,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:58,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:58,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:58,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:58,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:58,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:58,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:58,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:59,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:59,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:59,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:03,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:03,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-28 19:23:03,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:23:03,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 19:23:03,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:03,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:03,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:23:03,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:23:03,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-28 19:23:03,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:04,194 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:23:04,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:04,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:04,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:04,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:04,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:04,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:23:04,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:04,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:04,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:04,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:04,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:04,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:04,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832975664] [2020-10-28 19:23:04,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:04,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:23:04,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949771048] [2020-10-28 19:23:04,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:23:04,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:04,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:23:04,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:04,392 INFO L87 Difference]: Start difference. First operand 39507 states and 59287 transitions. Second operand 5 states. [2020-10-28 19:23:18,185 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:23:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:23,022 INFO L93 Difference]: Finished difference Result 115647 states and 172963 transitions. [2020-10-28 19:23:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:23:23,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-10-28 19:23:23,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:23,161 INFO L225 Difference]: With dead ends: 115647 [2020-10-28 19:23:23,162 INFO L226 Difference]: Without dead ends: 77293 [2020-10-28 19:23:23,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:23:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77293 states. [2020-10-28 19:23:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77293 to 77179. [2020-10-28 19:23:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77179 states. [2020-10-28 19:23:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77179 states to 77179 states and 114887 transitions. [2020-10-28 19:23:28,893 INFO L78 Accepts]: Start accepts. Automaton has 77179 states and 114887 transitions. Word has length 335 [2020-10-28 19:23:28,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:23:28,893 INFO L481 AbstractCegarLoop]: Abstraction has 77179 states and 114887 transitions. [2020-10-28 19:23:28,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:23:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 77179 states and 114887 transitions. [2020-10-28 19:23:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-28 19:23:28,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:28,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:28,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:23:28,970 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:28,971 INFO L82 PathProgramCache]: Analyzing trace with hash 669999213, now seen corresponding path program 1 times [2020-10-28 19:23:28,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:28,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450079083] [2020-10-28 19:23:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:29,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:29,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:34,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:34,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-28 19:23:34,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:23:34,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-28 19:23:34,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:34,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:23:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:23:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 19:23:34,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:23:35,282 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:23:35,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:35,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:35,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:35,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:35,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:35,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:23:35,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:35,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:35,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:35,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:35,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:35,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:35,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450079083] [2020-10-28 19:23:35,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:35,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:23:35,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329688541] [2020-10-28 19:23:35,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:23:35,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:35,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:23:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:35,467 INFO L87 Difference]: Start difference. First operand 77179 states and 114887 transitions. Second operand 5 states. [2020-10-28 19:23:53,856 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:24:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:00,740 INFO L93 Difference]: Finished difference Result 227625 states and 338141 transitions. [2020-10-28 19:24:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:00,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-10-28 19:24:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:01,038 INFO L225 Difference]: With dead ends: 227625 [2020-10-28 19:24:01,038 INFO L226 Difference]: Without dead ends: 151215 [2020-10-28 19:24:01,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:01,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151215 states. [2020-10-28 19:24:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151215 to 151101. [2020-10-28 19:24:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151101 states. [2020-10-28 19:24:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151101 states to 151101 states and 223355 transitions. [2020-10-28 19:24:13,475 INFO L78 Accepts]: Start accepts. Automaton has 151101 states and 223355 transitions. Word has length 337 [2020-10-28 19:24:13,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:13,475 INFO L481 AbstractCegarLoop]: Abstraction has 151101 states and 223355 transitions. [2020-10-28 19:24:13,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:24:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 151101 states and 223355 transitions. [2020-10-28 19:24:13,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-28 19:24:13,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:13,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:13,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:24:13,864 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:13,865 INFO L82 PathProgramCache]: Analyzing trace with hash -906435249, now seen corresponding path program 1 times [2020-10-28 19:24:13,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:13,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952294463] [2020-10-28 19:24:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:13,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:13,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:14,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:14,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:14,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:14,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:14,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:14,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:14,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:14,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:14,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:15,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:15,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking...