/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:04:37,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:04:37,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:04:37,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:04:37,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:04:37,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:04:37,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:04:37,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:04:37,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:04:37,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:04:37,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:04:37,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:04:37,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:04:37,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:04:37,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:04:37,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:04:37,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:04:37,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:04:37,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:04:37,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:04:37,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:04:37,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:04:37,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:04:37,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:04:37,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:04:37,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:04:37,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:04:37,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:04:37,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:04:37,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:04:37,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:04:37,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:04:37,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:04:37,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:04:37,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:04:37,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:04:37,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:04:37,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:04:37,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:04:37,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:04:37,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:04:37,664 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 19:04:37,689 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:04:37,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:04:37,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:04:37,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:04:37,692 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:04:37,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:04:37,692 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:04:37,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:04:37,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:04:37,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:04:37,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:04:37,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:04:37,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:04:37,694 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:04:37,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:04:37,694 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:04:37,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:04:37,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:04:37,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:04:37,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:04:37,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:04:37,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:04:37,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:04:37,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:04:37,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:04:37,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:04:37,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:04:37,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:04:37,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:04:37,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:04:38,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:04:38,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:04:38,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:04:38,153 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:04:38,153 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:04:38,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 19:04:38,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0cf4b9ea/4d8e0cc4595a4e1594afc3dbcc68aa8c/FLAG6ee15953f [2020-10-28 19:04:38,897 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:04:38,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 19:04:38,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0cf4b9ea/4d8e0cc4595a4e1594afc3dbcc68aa8c/FLAG6ee15953f [2020-10-28 19:04:39,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0cf4b9ea/4d8e0cc4595a4e1594afc3dbcc68aa8c [2020-10-28 19:04:39,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:04:39,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:04:39,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:04:39,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:04:39,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:04:39,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:04:39" (1/1) ... [2020-10-28 19:04:39,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51680c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39, skipping insertion in model container [2020-10-28 19:04:39,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:04:39" (1/1) ... [2020-10-28 19:04:39,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:04:39,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:04:39,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:04:39,665 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:04:39,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:04:39,826 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:04:39,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39 WrapperNode [2020-10-28 19:04:39,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:04:39,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:04:39,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:04:39,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:04:39,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39" (1/1) ... [2020-10-28 19:04:39,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39" (1/1) ... [2020-10-28 19:04:39,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39" (1/1) ... [2020-10-28 19:04:39,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39" (1/1) ... [2020-10-28 19:04:39,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39" (1/1) ... [2020-10-28 19:04:39,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39" (1/1) ... [2020-10-28 19:04:39,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39" (1/1) ... [2020-10-28 19:04:39,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:04:39,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:04:39,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:04:39,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:04:39,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39" (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 19:04:40,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:04:40,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:04:40,039 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:04:40,039 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:04:40,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:04:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:04:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:04:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:04:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:04:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:04:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:04:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:04:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:04:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:04:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:04:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:04:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:04:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:04:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:04:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:04:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:04:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:04:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:04:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:04:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:04:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:04:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:04:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:04:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:04:41,073 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:04:41,074 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:04:41,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:04:41 BoogieIcfgContainer [2020-10-28 19:04:41,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:04:41,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:04:41,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:04:41,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:04:41,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:04:39" (1/3) ... [2020-10-28 19:04:41,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2070c8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:04:41, skipping insertion in model container [2020-10-28 19:04:41,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:04:39" (2/3) ... [2020-10-28 19:04:41,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2070c8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:04:41, skipping insertion in model container [2020-10-28 19:04:41,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:04:41" (3/3) ... [2020-10-28 19:04:41,085 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 19:04:41,097 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:04:41,102 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:04:41,127 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:04:41,155 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:04:41,155 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:04:41,155 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:04:41,155 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:04:41,156 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:04:41,156 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:04:41,156 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:04:41,156 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:04:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-10-28 19:04:41,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 19:04:41,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:04:41,187 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] [2020-10-28 19:04:41,190 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:04:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:04:41,197 INFO L82 PathProgramCache]: Analyzing trace with hash 818380633, now seen corresponding path program 1 times [2020-10-28 19:04:41,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:04:41,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172507619] [2020-10-28 19:04:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:04:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:41,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:41,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:41,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:42,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:42,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:43,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:46,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:46,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 19:04:46,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:04:46,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 19:04:46,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:46,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:04:46,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 19:04:46,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:04:46,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:04:47,106 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:04:47,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:04:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:47,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:47,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:47,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:04:47,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:04:47,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:04:47,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:47,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:47,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:04:47,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:04:47,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:04:47,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:04:47,174 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 19:04:47,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172507619] [2020-10-28 19:04:47,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:04:47,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:04:47,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469429715] [2020-10-28 19:04:47,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:04:47,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:04:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:04:47,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:04:47,200 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2020-10-28 19:04:47,794 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:04:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:04:48,821 INFO L93 Difference]: Finished difference Result 320 states and 513 transitions. [2020-10-28 19:04:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:04:48,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 19:04:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:04:48,847 INFO L225 Difference]: With dead ends: 320 [2020-10-28 19:04:48,847 INFO L226 Difference]: Without dead ends: 211 [2020-10-28 19:04:48,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:04:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-28 19:04:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-28 19:04:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 19:04:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 308 transitions. [2020-10-28 19:04:48,980 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 308 transitions. Word has length 65 [2020-10-28 19:04:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:04:48,981 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 308 transitions. [2020-10-28 19:04:48,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:04:48,981 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 308 transitions. [2020-10-28 19:04:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 19:04:48,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:04:48,985 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] [2020-10-28 19:04:48,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:04:48,986 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:04:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:04:48,987 INFO L82 PathProgramCache]: Analyzing trace with hash -277871684, now seen corresponding path program 1 times [2020-10-28 19:04:48,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:04:48,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823028551] [2020-10-28 19:04:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:04:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:49,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:49,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:49,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:49,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:52,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:52,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 19:04:52,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:04:52,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3843 [2020-10-28 19:04:52,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:52,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:52,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:04:52,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:04:52,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:04:52,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 19:04:53,154 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:04:53,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:04:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:53,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:53,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:53,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:04:53,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:04:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:04:53,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:53,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:04:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:04:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:04:53,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:53,198 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 19:04:53,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823028551] [2020-10-28 19:04:53,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:04:53,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:04:53,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975638397] [2020-10-28 19:04:53,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:04:53,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:04:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:04:53,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:04:53,202 INFO L87 Difference]: Start difference. First operand 208 states and 308 transitions. Second operand 4 states. [2020-10-28 19:04:53,478 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:04:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:04:54,121 INFO L93 Difference]: Finished difference Result 514 states and 794 transitions. [2020-10-28 19:04:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:04:54,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 19:04:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:04:54,128 INFO L225 Difference]: With dead ends: 514 [2020-10-28 19:04:54,128 INFO L226 Difference]: Without dead ends: 345 [2020-10-28 19:04:54,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:04:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-28 19:04:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2020-10-28 19:04:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-28 19:04:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 521 transitions. [2020-10-28 19:04:54,182 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 521 transitions. Word has length 66 [2020-10-28 19:04:54,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:04:54,183 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 521 transitions. [2020-10-28 19:04:54,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:04:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 521 transitions. [2020-10-28 19:04:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 19:04:54,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:04:54,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:04:54,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:04:54,186 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:04:54,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:04:54,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1291814063, now seen corresponding path program 1 times [2020-10-28 19:04:54,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:04:54,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011784743] [2020-10-28 19:04:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:04:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:54,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:54,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:54,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:54,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:55,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:55,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 19:04:55,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:04:55,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-28 19:04:55,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:55,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:04:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 19:04:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:04:55,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:56,195 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:04:56,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:04:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:56,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:56,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:56,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:04:56,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:04:56,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:04:56,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:56,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:56,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:04:56,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:04:56,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:04:56,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:56,235 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 19:04:56,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011784743] [2020-10-28 19:04:56,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:04:56,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:04:56,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474138651] [2020-10-28 19:04:56,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:04:56,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:04:56,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:04:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:04:56,239 INFO L87 Difference]: Start difference. First operand 342 states and 521 transitions. Second operand 4 states. [2020-10-28 19:04:56,463 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:04:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:04:57,109 INFO L93 Difference]: Finished difference Result 884 states and 1381 transitions. [2020-10-28 19:04:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:04:57,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 19:04:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:04:57,115 INFO L225 Difference]: With dead ends: 884 [2020-10-28 19:04:57,115 INFO L226 Difference]: Without dead ends: 581 [2020-10-28 19:04:57,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:04:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-10-28 19:04:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 578. [2020-10-28 19:04:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-28 19:04:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 893 transitions. [2020-10-28 19:04:57,197 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 893 transitions. Word has length 67 [2020-10-28 19:04:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:04:57,197 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 893 transitions. [2020-10-28 19:04:57,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:04:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 893 transitions. [2020-10-28 19:04:57,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 19:04:57,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:04:57,204 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] [2020-10-28 19:04:57,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:04:57,204 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:04:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:04:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1995530445, now seen corresponding path program 1 times [2020-10-28 19:04:57,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:04:57,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924919794] [2020-10-28 19:04:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:04:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:57,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:57,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:57,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:58,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:58,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 19:04:58,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:04:58,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-10-28 19:04:58,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:58,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:04:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:04:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:04:58,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:58,339 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:04:58,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:04:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:58,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:58,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:58,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:04:58,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:04:58,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:04:58,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:58,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:04:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:04:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:04:58,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:04:58,409 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 19:04:58,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924919794] [2020-10-28 19:04:58,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:04:58,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:04:58,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215188596] [2020-10-28 19:04:58,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:04:58,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:04:58,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:04:58,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:04:58,414 INFO L87 Difference]: Start difference. First operand 578 states and 893 transitions. Second operand 4 states. [2020-10-28 19:04:58,686 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:04:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:04:59,390 INFO L93 Difference]: Finished difference Result 1568 states and 2457 transitions. [2020-10-28 19:04:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:04:59,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 19:04:59,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:04:59,399 INFO L225 Difference]: With dead ends: 1568 [2020-10-28 19:04:59,399 INFO L226 Difference]: Without dead ends: 1029 [2020-10-28 19:04:59,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:04:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2020-10-28 19:04:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1026. [2020-10-28 19:04:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2020-10-28 19:04:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1593 transitions. [2020-10-28 19:04:59,479 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1593 transitions. Word has length 68 [2020-10-28 19:04:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:04:59,483 INFO L481 AbstractCegarLoop]: Abstraction has 1026 states and 1593 transitions. [2020-10-28 19:04:59,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:04:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1593 transitions. [2020-10-28 19:04:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 19:04:59,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:04:59,489 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] [2020-10-28 19:04:59,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:04:59,490 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:04:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:04:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash -984700738, now seen corresponding path program 1 times [2020-10-28 19:04:59,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:04:59,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458601096] [2020-10-28 19:04:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:04:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:59,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:59,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:00,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:00,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 19:05:00,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:05:00,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-28 19:05:00,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:00,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:00,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:05:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:05:00,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:00,393 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:05:00,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:00,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:00,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:00,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:00,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:00,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:05:00,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:00,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:00,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:00,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:00,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:00,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:00,438 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 19:05:00,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458601096] [2020-10-28 19:05:00,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:00,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:00,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677520287] [2020-10-28 19:05:00,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:00,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:00,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:00,451 INFO L87 Difference]: Start difference. First operand 1026 states and 1593 transitions. Second operand 4 states. [2020-10-28 19:05:00,678 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:05:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:01,415 INFO L93 Difference]: Finished difference Result 2744 states and 4285 transitions. [2020-10-28 19:05:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:01,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 19:05:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:01,426 INFO L225 Difference]: With dead ends: 2744 [2020-10-28 19:05:01,426 INFO L226 Difference]: Without dead ends: 1757 [2020-10-28 19:05:01,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:01,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2020-10-28 19:05:01,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1754. [2020-10-28 19:05:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1754 states. [2020-10-28 19:05:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 2713 transitions. [2020-10-28 19:05:01,541 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 2713 transitions. Word has length 68 [2020-10-28 19:05:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:01,542 INFO L481 AbstractCegarLoop]: Abstraction has 1754 states and 2713 transitions. [2020-10-28 19:05:01,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:05:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 2713 transitions. [2020-10-28 19:05:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:05:01,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:01,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:05:01,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:05:01,543 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:01,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:01,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2047637936, now seen corresponding path program 1 times [2020-10-28 19:05:01,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:01,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056129363] [2020-10-28 19:05:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:01,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:01,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:02,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:02,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:05:02,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:05:02,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-28 19:05:02,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:02,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:02,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:05:02,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:05:02,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:05:02,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:02,819 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:05:02,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:02,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:02,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:02,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:02,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:02,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:05:02,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:02,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:02,862 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 19:05:02,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056129363] [2020-10-28 19:05:02,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:02,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:05:02,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819825812] [2020-10-28 19:05:02,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:05:02,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:02,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:05:02,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:05:02,865 INFO L87 Difference]: Start difference. First operand 1754 states and 2713 transitions. Second operand 8 states. [2020-10-28 19:05:03,127 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:05:04,144 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:05:04,366 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:05:04,592 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 19:05:04,809 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 19:05:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:05,321 INFO L93 Difference]: Finished difference Result 12044 states and 18757 transitions. [2020-10-28 19:05:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:05:05,322 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 19:05:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:05,386 INFO L225 Difference]: With dead ends: 12044 [2020-10-28 19:05:05,386 INFO L226 Difference]: Without dead ends: 10329 [2020-10-28 19:05:05,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-28 19:05:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2020-10-28 19:05:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 3466. [2020-10-28 19:05:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3466 states. [2020-10-28 19:05:05,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 5321 transitions. [2020-10-28 19:05:05,775 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 5321 transitions. Word has length 69 [2020-10-28 19:05:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:05,777 INFO L481 AbstractCegarLoop]: Abstraction has 3466 states and 5321 transitions. [2020-10-28 19:05:05,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:05:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 5321 transitions. [2020-10-28 19:05:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:05:05,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:05,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:05:05,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:05:05,778 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:05,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525504, now seen corresponding path program 1 times [2020-10-28 19:05:05,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:05,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331847627] [2020-10-28 19:05:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:05,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:06,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:06,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:06,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:05:06,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:05:06,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-28 19:05:06,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:06,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:06,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:05:06,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 19:05:06,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:05:06,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:06,705 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:05:06,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:06,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:06,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:06,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:06,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:06,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:05:06,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:06,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:06,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:06,741 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 19:05:06,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331847627] [2020-10-28 19:05:06,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:06,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:05:06,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848738165] [2020-10-28 19:05:06,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:05:06,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:05:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:06,743 INFO L87 Difference]: Start difference. First operand 3466 states and 5321 transitions. Second operand 5 states. [2020-10-28 19:05:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:08,029 INFO L93 Difference]: Finished difference Result 7021 states and 10731 transitions. [2020-10-28 19:05:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:05:08,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 19:05:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:08,069 INFO L225 Difference]: With dead ends: 7021 [2020-10-28 19:05:08,070 INFO L226 Difference]: Without dead ends: 7018 [2020-10-28 19:05:08,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:05:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7018 states. [2020-10-28 19:05:08,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7018 to 3594. [2020-10-28 19:05:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3594 states. [2020-10-28 19:05:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3594 states to 3594 states and 5449 transitions. [2020-10-28 19:05:08,509 INFO L78 Accepts]: Start accepts. Automaton has 3594 states and 5449 transitions. Word has length 70 [2020-10-28 19:05:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:08,509 INFO L481 AbstractCegarLoop]: Abstraction has 3594 states and 5449 transitions. [2020-10-28 19:05:08,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:05:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3594 states and 5449 transitions. [2020-10-28 19:05:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:05:08,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:08,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:05:08,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:05:08,518 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:08,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:08,519 INFO L82 PathProgramCache]: Analyzing trace with hash 344284897, now seen corresponding path program 1 times [2020-10-28 19:05:08,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:08,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449318779] [2020-10-28 19:05:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:08,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:08,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:09,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:09,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:05:09,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:05:09,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-28 19:05:09,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:09,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:05:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 19:05:09,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:09,419 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:05:09,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:09,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:09,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:09,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:09,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:09,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:05:09,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:09,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:09,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:09,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:09,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:09,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:09,455 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 19:05:09,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449318779] [2020-10-28 19:05:09,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:09,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:09,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464552338] [2020-10-28 19:05:09,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:09,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:09,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:09,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:09,464 INFO L87 Difference]: Start difference. First operand 3594 states and 5449 transitions. Second operand 4 states. [2020-10-28 19:05:09,669 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 19:05:10,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:10,619 INFO L93 Difference]: Finished difference Result 8882 states and 13487 transitions. [2020-10-28 19:05:10,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:10,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 19:05:10,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:10,663 INFO L225 Difference]: With dead ends: 8882 [2020-10-28 19:05:10,664 INFO L226 Difference]: Without dead ends: 5327 [2020-10-28 19:05:10,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5327 states. [2020-10-28 19:05:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5327 to 5324. [2020-10-28 19:05:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5324 states. [2020-10-28 19:05:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5324 states to 5324 states and 8043 transitions. [2020-10-28 19:05:11,164 INFO L78 Accepts]: Start accepts. Automaton has 5324 states and 8043 transitions. Word has length 71 [2020-10-28 19:05:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:11,164 INFO L481 AbstractCegarLoop]: Abstraction has 5324 states and 8043 transitions. [2020-10-28 19:05:11,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:05:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5324 states and 8043 transitions. [2020-10-28 19:05:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 19:05:11,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:11,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:11,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:05:11,170 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1802703159, now seen corresponding path program 1 times [2020-10-28 19:05:11,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:11,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130738323] [2020-10-28 19:05:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:11,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:11,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:12,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:12,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 19:05:12,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:05:12,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 946 [2020-10-28 19:05:12,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:12,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:12,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:05:12,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:05:12,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 19:05:12,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:12,438 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:05:12,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:12,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:12,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:12,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:12,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:12,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:05:12,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:12,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:12,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:12,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:12,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:12,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 19:05:12,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130738323] [2020-10-28 19:05:12,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:05:12,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 19:05:12,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588383204] [2020-10-28 19:05:12,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:05:12,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:12,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:05:12,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:12,504 INFO L87 Difference]: Start difference. First operand 5324 states and 8043 transitions. Second operand 5 states. [2020-10-28 19:05:12,743 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 19:05:13,612 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 19:05:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:14,197 INFO L93 Difference]: Finished difference Result 12309 states and 18673 transitions. [2020-10-28 19:05:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:05:14,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2020-10-28 19:05:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:14,217 INFO L225 Difference]: With dead ends: 12309 [2020-10-28 19:05:14,217 INFO L226 Difference]: Without dead ends: 8754 [2020-10-28 19:05:14,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:05:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8754 states. [2020-10-28 19:05:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8754 to 8748. [2020-10-28 19:05:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8748 states. [2020-10-28 19:05:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8748 states to 8748 states and 13195 transitions. [2020-10-28 19:05:15,030 INFO L78 Accepts]: Start accepts. Automaton has 8748 states and 13195 transitions. Word has length 96 [2020-10-28 19:05:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:15,030 INFO L481 AbstractCegarLoop]: Abstraction has 8748 states and 13195 transitions. [2020-10-28 19:05:15,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:05:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 8748 states and 13195 transitions. [2020-10-28 19:05:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 19:05:15,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:15,035 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:15,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:05:15,036 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1835737786, now seen corresponding path program 1 times [2020-10-28 19:05:15,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:15,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175366755] [2020-10-28 19:05:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:15,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:15,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:15,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:15,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:20,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:20,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 19:05:20,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:05:20,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 19:05:20,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:20,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:20,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:20,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 19:05:20,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:05:20,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:20,312 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:05:20,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:20,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:20,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:20,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:20,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:05:20,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:20,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:20,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:05:20,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175366755] [2020-10-28 19:05:20,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:20,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:20,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661932383] [2020-10-28 19:05:20,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:20,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:20,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:20,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:20,354 INFO L87 Difference]: Start difference. First operand 8748 states and 13195 transitions. Second operand 4 states. [2020-10-28 19:05:20,575 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:05:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:22,013 INFO L93 Difference]: Finished difference Result 25650 states and 38671 transitions. [2020-10-28 19:05:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:22,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 19:05:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:22,058 INFO L225 Difference]: With dead ends: 25650 [2020-10-28 19:05:22,058 INFO L226 Difference]: Without dead ends: 16943 [2020-10-28 19:05:22,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16943 states. [2020-10-28 19:05:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16943 to 16940. [2020-10-28 19:05:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16940 states. [2020-10-28 19:05:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16940 states to 16940 states and 25355 transitions. [2020-10-28 19:05:23,359 INFO L78 Accepts]: Start accepts. Automaton has 16940 states and 25355 transitions. Word has length 97 [2020-10-28 19:05:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:23,359 INFO L481 AbstractCegarLoop]: Abstraction has 16940 states and 25355 transitions. [2020-10-28 19:05:23,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:05:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 16940 states and 25355 transitions. [2020-10-28 19:05:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 19:05:23,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:23,367 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:23,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:05:23,367 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:23,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1711404934, now seen corresponding path program 1 times [2020-10-28 19:05:23,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:23,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212975682] [2020-10-28 19:05:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:23,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:23,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:23,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:23,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:25,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:28,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:28,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 19:05:28,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:05:28,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 19:05:28,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:28,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:28,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:28,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 19:05:28,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:05:28,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:05:28,643 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:05:28,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:28,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:28,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:28,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:28,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:28,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:05:28,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:28,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:28,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:28,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:28,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:28,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:05:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:05:28,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212975682] [2020-10-28 19:05:28,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:28,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:28,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673958471] [2020-10-28 19:05:28,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:28,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:28,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:28,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:28,704 INFO L87 Difference]: Start difference. First operand 16940 states and 25355 transitions. Second operand 4 states. [2020-10-28 19:05:29,002 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:05:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:31,172 INFO L93 Difference]: Finished difference Result 48978 states and 73103 transitions. [2020-10-28 19:05:31,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:31,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 19:05:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:31,237 INFO L225 Difference]: With dead ends: 48978 [2020-10-28 19:05:31,238 INFO L226 Difference]: Without dead ends: 32079 [2020-10-28 19:05:31,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32079 states. [2020-10-28 19:05:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32079 to 32076. [2020-10-28 19:05:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32076 states. [2020-10-28 19:05:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32076 states to 32076 states and 47467 transitions. [2020-10-28 19:05:33,115 INFO L78 Accepts]: Start accepts. Automaton has 32076 states and 47467 transitions. Word has length 97 [2020-10-28 19:05:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:33,115 INFO L481 AbstractCegarLoop]: Abstraction has 32076 states and 47467 transitions. [2020-10-28 19:05:33,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:05:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 32076 states and 47467 transitions. [2020-10-28 19:05:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 19:05:33,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:33,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:33,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:05:33,128 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash -298740997, now seen corresponding path program 1 times [2020-10-28 19:05:33,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:33,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912454901] [2020-10-28 19:05:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:33,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:33,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:33,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:33,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:34,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:38,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:38,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 19:05:38,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:05:38,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4922 [2020-10-28 19:05:38,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:38,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:38,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:38,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 19:05:38,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 19:05:38,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:38,345 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:05:38,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:38,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:38,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:38,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:38,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:38,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:05:38,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:38,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:38,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:38,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:38,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:38,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:05:38,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912454901] [2020-10-28 19:05:38,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:38,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:38,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289571472] [2020-10-28 19:05:38,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:38,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:38,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:38,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:38,410 INFO L87 Difference]: Start difference. First operand 32076 states and 47467 transitions. Second operand 4 states. [2020-10-28 19:05:38,629 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:05:42,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:42,180 INFO L93 Difference]: Finished difference Result 92626 states and 136559 transitions. [2020-10-28 19:05:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:42,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 19:05:42,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:42,281 INFO L225 Difference]: With dead ends: 92626 [2020-10-28 19:05:42,281 INFO L226 Difference]: Without dead ends: 60591 [2020-10-28 19:05:42,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60591 states. [2020-10-28 19:05:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60591 to 60588. [2020-10-28 19:05:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60588 states. [2020-10-28 19:05:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60588 states to 60588 states and 88491 transitions. [2020-10-28 19:05:46,534 INFO L78 Accepts]: Start accepts. Automaton has 60588 states and 88491 transitions. Word has length 97 [2020-10-28 19:05:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:46,534 INFO L481 AbstractCegarLoop]: Abstraction has 60588 states and 88491 transitions. [2020-10-28 19:05:46,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:05:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 60588 states and 88491 transitions. [2020-10-28 19:05:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 19:05:46,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:46,552 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:46,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:05:46,552 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:46,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:46,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1789217426, now seen corresponding path program 1 times [2020-10-28 19:05:46,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:46,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657413660] [2020-10-28 19:05:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:46,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:46,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:46,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:47,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:47,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:51,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:51,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 19:05:51,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:05:51,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4981 [2020-10-28 19:05:51,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:51,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 19:05:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 19:05:51,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:51,782 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:05:51,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:51,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:51,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:51,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:51,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:51,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:05:51,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:51,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:51,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:51,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:51,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:51,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:05:51,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657413660] [2020-10-28 19:05:51,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:51,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:51,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968774089] [2020-10-28 19:05:51,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:51,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:51,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:51,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:51,832 INFO L87 Difference]: Start difference. First operand 60588 states and 88491 transitions. Second operand 4 states. [2020-10-28 19:05:52,059 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:05:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:59,121 INFO L93 Difference]: Finished difference Result 174642 states and 253871 transitions. [2020-10-28 19:05:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:59,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 19:05:59,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:59,383 INFO L225 Difference]: With dead ends: 174642 [2020-10-28 19:05:59,383 INFO L226 Difference]: Without dead ends: 114095 [2020-10-28 19:05:59,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114095 states. [2020-10-28 19:06:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114095 to 114092. [2020-10-28 19:06:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114092 states. [2020-10-28 19:06:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114092 states to 114092 states and 164139 transitions. [2020-10-28 19:06:07,000 INFO L78 Accepts]: Start accepts. Automaton has 114092 states and 164139 transitions. Word has length 97 [2020-10-28 19:06:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:07,001 INFO L481 AbstractCegarLoop]: Abstraction has 114092 states and 164139 transitions. [2020-10-28 19:06:07,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:06:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 114092 states and 164139 transitions. [2020-10-28 19:06:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 19:06:07,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:07,023 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:07,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:06:07,024 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash 238515471, now seen corresponding path program 1 times [2020-10-28 19:06:07,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:07,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054644804] [2020-10-28 19:06:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:07,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:07,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:07,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:07,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:08,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:12,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:12,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 19:06:12,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:06:12,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4985 [2020-10-28 19:06:12,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:12,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:12,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:06:12,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 19:06:12,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:06:12,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:12,291 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:06:12,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:12,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:12,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:12,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:12,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:12,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:06:12,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:12,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:06:12,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:12,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:06:12,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:06:12,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054644804] [2020-10-28 19:06:12,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:06:12,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:06:12,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26211658] [2020-10-28 19:06:12,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:06:12,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:12,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:06:12,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:06:12,333 INFO L87 Difference]: Start difference. First operand 114092 states and 164139 transitions. Second operand 4 states. [2020-10-28 19:06:12,646 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:06:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:06:25,934 INFO L93 Difference]: Finished difference Result 328114 states and 469295 transitions. [2020-10-28 19:06:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:06:25,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 19:06:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:06:26,418 INFO L225 Difference]: With dead ends: 328114 [2020-10-28 19:06:26,418 INFO L226 Difference]: Without dead ends: 214063 [2020-10-28 19:06:26,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:06:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214063 states. [2020-10-28 19:06:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214063 to 214060. [2020-10-28 19:06:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214060 states. [2020-10-28 19:06:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214060 states to 214060 states and 302635 transitions. [2020-10-28 19:06:40,495 INFO L78 Accepts]: Start accepts. Automaton has 214060 states and 302635 transitions. Word has length 97 [2020-10-28 19:06:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:40,495 INFO L481 AbstractCegarLoop]: Abstraction has 214060 states and 302635 transitions. [2020-10-28 19:06:40,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:06:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 214060 states and 302635 transitions. [2020-10-28 19:06:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 19:06:40,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:40,544 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:40,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:06:40,544 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1403111750, now seen corresponding path program 1 times [2020-10-28 19:06:40,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:40,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352434431] [2020-10-28 19:06:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:40,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:40,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:40,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:40,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:41,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:43,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:43,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 19:06:43,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:06:43,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2886 [2020-10-28 19:06:43,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:43,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:43,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:06:43,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:06:43,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 19:06:43,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:43,719 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:06:43,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:43,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:43,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:43,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:43,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:43,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:06:43,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:43,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:43,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:06:43,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:43,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:06:43,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 19:06:43,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352434431] [2020-10-28 19:06:43,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:06:43,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 19:06:43,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816607155] [2020-10-28 19:06:43,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:06:43,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:43,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:06:43,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:06:43,756 INFO L87 Difference]: Start difference. First operand 214060 states and 302635 transitions. Second operand 8 states. [2020-10-28 19:06:44,026 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 19:06:46,386 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 19:06:46,623 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:06:46,852 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:07:19,202 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-28 19:07:19,508 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 19:07:19,776 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 19:07:20,359 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 178