/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_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:15:36,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:15:36,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:15:36,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:15:36,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:15:36,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:15:36,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:15:36,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:15:36,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:15:36,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:15:36,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:15:36,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:15:36,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:15:36,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:15:36,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:15:36,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:15:36,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:15:36,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:15:36,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:15:36,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:15:36,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:15:36,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:15:36,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:15:36,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:15:36,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:15:36,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:15:36,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:15:36,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:15:36,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:15:36,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:15:36,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:15:36,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:15:36,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:15:36,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:15:36,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:15:36,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:15:36,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:15:36,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:15:36,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:15:36,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:15:36,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:15:36,713 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:15:36,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:15:36,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:15:36,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:15:36,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:15:36,744 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:15:36,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:15:36,745 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:15:36,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:15:36,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:15:36,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:15:36,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:15:36,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:15:36,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:15:36,747 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:15:36,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:15:36,747 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:15:36,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:15:36,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:15:36,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:15:36,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:15:36,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:15:36,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:15:36,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:15:36,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:15:36,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:15:36,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:15:36,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:15:36,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:15:36,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:15:36,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:15:37,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:15:37,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:15:37,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:15:37,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:15:37,200 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:15:37,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:15:37,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb4bdc573/f276966baaee40aab41a89a4ad5197ea/FLAGc356f5196 [2020-10-28 18:15:38,168 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:15:38,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:15:38,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb4bdc573/f276966baaee40aab41a89a4ad5197ea/FLAGc356f5196 [2020-10-28 18:15:38,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb4bdc573/f276966baaee40aab41a89a4ad5197ea [2020-10-28 18:15:38,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:15:38,342 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:15:38,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:15:38,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:15:38,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:15:38,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:15:38" (1/1) ... [2020-10-28 18:15:38,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b2b99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:38, skipping insertion in model container [2020-10-28 18:15:38,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:15:38" (1/1) ... [2020-10-28 18:15:38,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:15:38,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:15:39,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:15:39,586 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:15:39,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:15:39,961 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:15:39,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39 WrapperNode [2020-10-28 18:15:39,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:15:39,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:15:39,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:15:39,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:15:39,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39" (1/1) ... [2020-10-28 18:15:39,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39" (1/1) ... [2020-10-28 18:15:40,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39" (1/1) ... [2020-10-28 18:15:40,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39" (1/1) ... [2020-10-28 18:15:40,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39" (1/1) ... [2020-10-28 18:15:40,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39" (1/1) ... [2020-10-28 18:15:40,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39" (1/1) ... [2020-10-28 18:15:40,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:15:40,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:15:40,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:15:40,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:15:40,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39" (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 18:15:40,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:15:40,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:15:40,293 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:15:40,294 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:15:40,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:15:40,295 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:15:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:15:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:15:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:15:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:15:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:15:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:15:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:15:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:15:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:15:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:15:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:15:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:15:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:15:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:15:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:15:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:15:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:15:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:15:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:15:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:15:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:15:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:15:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:15:43,001 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:15:43,001 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:15:43,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:15:43 BoogieIcfgContainer [2020-10-28 18:15:43,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:15:43,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:15:43,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:15:43,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:15:43,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:15:38" (1/3) ... [2020-10-28 18:15:43,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec10923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:15:43, skipping insertion in model container [2020-10-28 18:15:43,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39" (2/3) ... [2020-10-28 18:15:43,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec10923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:15:43, skipping insertion in model container [2020-10-28 18:15:43,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:15:43" (3/3) ... [2020-10-28 18:15:43,014 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:15:43,028 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:15:43,035 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:15:43,050 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:15:43,086 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:15:43,087 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:15:43,087 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:15:43,087 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:15:43,087 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:15:43,087 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:15:43,087 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:15:43,087 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:15:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states. [2020-10-28 18:15:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-28 18:15:43,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:43,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:43,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:43,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:43,159 INFO L82 PathProgramCache]: Analyzing trace with hash -650766214, now seen corresponding path program 1 times [2020-10-28 18:15:43,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:43,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325464779] [2020-10-28 18:15:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:44,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:45,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:45,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:46,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:46,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:47,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:47,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:47,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:47,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:48,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:48,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:48,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:48,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:49,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:49,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-28 18:15:49,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:15:49,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-28 18:15:49,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:49,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:15:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:15:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-28 18:15:49,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:15:49,906 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2020-10-28 18:15:50,750 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:15:50,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:50,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:50,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:50,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:50,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:15:50,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:50,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:50,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:15:50,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:50,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:15:50,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:15:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:51,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325464779] [2020-10-28 18:15:51,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:51,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:15:51,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739800185] [2020-10-28 18:15:51,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:15:51,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:51,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:15:51,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:15:51,098 INFO L87 Difference]: Start difference. First operand 729 states. Second operand 5 states. [2020-10-28 18:15:59,692 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:16:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:01,818 INFO L93 Difference]: Finished difference Result 2118 states and 3761 transitions. [2020-10-28 18:16:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:16:01,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 303 [2020-10-28 18:16:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:01,861 INFO L225 Difference]: With dead ends: 2118 [2020-10-28 18:16:01,861 INFO L226 Difference]: Without dead ends: 1414 [2020-10-28 18:16:01,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2020-10-28 18:16:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1411. [2020-10-28 18:16:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1411 states. [2020-10-28 18:16:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 2190 transitions. [2020-10-28 18:16:02,072 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 2190 transitions. Word has length 303 [2020-10-28 18:16:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:02,073 INFO L481 AbstractCegarLoop]: Abstraction has 1411 states and 2190 transitions. [2020-10-28 18:16:02,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 2190 transitions. [2020-10-28 18:16:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-28 18:16:02,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:02,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:02,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:16:02,088 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:02,089 INFO L82 PathProgramCache]: Analyzing trace with hash -398038249, now seen corresponding path program 1 times [2020-10-28 18:16:02,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:02,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796578396] [2020-10-28 18:16:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:02,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:02,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:02,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:03,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:03,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:03,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:03,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:03,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:03,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:04,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:04,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:04,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:04,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:05,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:05,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:05,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:07,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:07,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-28 18:16:07,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:16:07,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 18:16:07,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:07,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:07,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:07,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:07,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-28 18:16:07,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:08,139 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:16:08,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:08,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:08,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:08,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:08,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:08,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 18:16:08,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:08,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:08,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:08,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796578396] [2020-10-28 18:16:08,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:08,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:08,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569072868] [2020-10-28 18:16:08,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:08,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:08,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:08,497 INFO L87 Difference]: Start difference. First operand 1411 states and 2190 transitions. Second operand 5 states. [2020-10-28 18:16:15,594 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:16:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:17,533 INFO L93 Difference]: Finished difference Result 4146 states and 6426 transitions. [2020-10-28 18:16:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:17,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 305 [2020-10-28 18:16:17,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:17,553 INFO L225 Difference]: With dead ends: 4146 [2020-10-28 18:16:17,553 INFO L226 Difference]: Without dead ends: 2760 [2020-10-28 18:16:17,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2020-10-28 18:16:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2757. [2020-10-28 18:16:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2757 states. [2020-10-28 18:16:17,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4248 transitions. [2020-10-28 18:16:17,740 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4248 transitions. Word has length 305 [2020-10-28 18:16:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:17,744 INFO L481 AbstractCegarLoop]: Abstraction has 2757 states and 4248 transitions. [2020-10-28 18:16:17,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4248 transitions. [2020-10-28 18:16:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-28 18:16:17,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:17,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:17,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:16:17,755 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:17,759 INFO L82 PathProgramCache]: Analyzing trace with hash 686140311, now seen corresponding path program 1 times [2020-10-28 18:16:17,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:17,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130173203] [2020-10-28 18:16:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:17,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:19,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:19,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:19,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:20,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:20,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:22,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:22,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 18:16:22,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:16:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:16:22,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:22,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:16:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:16:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-28 18:16:22,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:23,704 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:16:23,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:23,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:23,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:23,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:23,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:23,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:16:23,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:23,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:23,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:23,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:23,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130173203] [2020-10-28 18:16:23,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:23,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:16:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576761570] [2020-10-28 18:16:23,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:16:23,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:16:23,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:16:23,949 INFO L87 Difference]: Start difference. First operand 2757 states and 4248 transitions. Second operand 4 states. [2020-10-28 18:16:31,682 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:16:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:33,437 INFO L93 Difference]: Finished difference Result 7890 states and 12088 transitions. [2020-10-28 18:16:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:16:33,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 307 [2020-10-28 18:16:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:33,466 INFO L225 Difference]: With dead ends: 7890 [2020-10-28 18:16:33,466 INFO L226 Difference]: Without dead ends: 5399 [2020-10-28 18:16:33,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2020-10-28 18:16:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 5396. [2020-10-28 18:16:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5396 states. [2020-10-28 18:16:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5396 states to 5396 states and 8264 transitions. [2020-10-28 18:16:33,767 INFO L78 Accepts]: Start accepts. Automaton has 5396 states and 8264 transitions. Word has length 307 [2020-10-28 18:16:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:33,768 INFO L481 AbstractCegarLoop]: Abstraction has 5396 states and 8264 transitions. [2020-10-28 18:16:33,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:16:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5396 states and 8264 transitions. [2020-10-28 18:16:33,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-28 18:16:33,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:33,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:33,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:16:33,784 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:33,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1267308274, now seen corresponding path program 1 times [2020-10-28 18:16:33,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:33,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880923302] [2020-10-28 18:16:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:33,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:33,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:33,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:35,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:35,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:35,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:35,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:35,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:35,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:38,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:38,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 18:16:38,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:16:38,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:16:38,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:38,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:38,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:38,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:38,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-28 18:16:38,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:39,609 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:16:39,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:39,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:39,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:39,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:39,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:39,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-28 18:16:39,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:39,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:39,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:39,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:39,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880923302] [2020-10-28 18:16:39,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:39,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:39,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486687111] [2020-10-28 18:16:39,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:39,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:39,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:39,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:39,821 INFO L87 Difference]: Start difference. First operand 5396 states and 8264 transitions. Second operand 5 states. [2020-10-28 18:16:46,466 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:16:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:48,344 INFO L93 Difference]: Finished difference Result 15758 states and 24066 transitions. [2020-10-28 18:16:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:48,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 307 [2020-10-28 18:16:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:48,394 INFO L225 Difference]: With dead ends: 15758 [2020-10-28 18:16:48,394 INFO L226 Difference]: Without dead ends: 10499 [2020-10-28 18:16:48,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2020-10-28 18:16:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 10496. [2020-10-28 18:16:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10496 states. [2020-10-28 18:16:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10496 states to 10496 states and 15928 transitions. [2020-10-28 18:16:49,086 INFO L78 Accepts]: Start accepts. Automaton has 10496 states and 15928 transitions. Word has length 307 [2020-10-28 18:16:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:49,086 INFO L481 AbstractCegarLoop]: Abstraction has 10496 states and 15928 transitions. [2020-10-28 18:16:49,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 10496 states and 15928 transitions. [2020-10-28 18:16:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-28 18:16:49,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:49,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:49,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:16:49,113 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:49,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:49,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1045843887, now seen corresponding path program 1 times [2020-10-28 18:16:49,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:49,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062688558] [2020-10-28 18:16:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:49,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:51,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:52,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:52,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:52,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:52,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:52,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:52,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:53,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:54,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:54,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-28 18:16:54,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:16:54,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 18:16:54,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:54,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:54,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-28 18:16:54,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:16:55,004 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:16:55,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:55,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:55,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:55,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:55,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:55,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:16:55,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:55,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:55,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:55,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062688558] [2020-10-28 18:16:55,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:55,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:55,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685491668] [2020-10-28 18:16:55,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:55,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:55,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:55,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:55,172 INFO L87 Difference]: Start difference. First operand 10496 states and 15928 transitions. Second operand 5 states. [2020-10-28 18:17:02,059 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:17:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:04,044 INFO L93 Difference]: Finished difference Result 30512 states and 46153 transitions. [2020-10-28 18:17:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:04,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2020-10-28 18:17:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:04,114 INFO L225 Difference]: With dead ends: 30512 [2020-10-28 18:17:04,115 INFO L226 Difference]: Without dead ends: 20397 [2020-10-28 18:17:04,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:04,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20397 states. [2020-10-28 18:17:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20397 to 20394. [2020-10-28 18:17:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20394 states. [2020-10-28 18:17:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20394 states to 20394 states and 30645 transitions. [2020-10-28 18:17:05,430 INFO L78 Accepts]: Start accepts. Automaton has 20394 states and 30645 transitions. Word has length 309 [2020-10-28 18:17:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:05,430 INFO L481 AbstractCegarLoop]: Abstraction has 20394 states and 30645 transitions. [2020-10-28 18:17:05,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:05,431 INFO L276 IsEmpty]: Start isEmpty. Operand 20394 states and 30645 transitions. [2020-10-28 18:17:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-28 18:17:05,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:05,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:05,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:17:05,488 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash 723121792, now seen corresponding path program 1 times [2020-10-28 18:17:05,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:05,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261645061] [2020-10-28 18:17:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:05,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:05,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:05,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:05,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:05,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:05,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:06,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:06,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:06,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:06,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:06,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:07,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:10,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:10,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-28 18:17:10,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:17:10,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-28 18:17:10,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:10,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:10,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:10,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:10,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 18:17:10,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:11,469 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:17:11,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:11,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:11,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:11,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:11,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:11,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:17:11,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:11,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:11,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:11,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:11,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:11,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:11,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261645061] [2020-10-28 18:17:11,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:11,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:11,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021722683] [2020-10-28 18:17:11,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:11,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:11,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:11,681 INFO L87 Difference]: Start difference. First operand 20394 states and 30645 transitions. Second operand 5 states. [2020-10-28 18:17:20,244 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:17:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:22,902 INFO L93 Difference]: Finished difference Result 58692 states and 87721 transitions. [2020-10-28 18:17:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:22,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 311 [2020-10-28 18:17:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:22,987 INFO L225 Difference]: With dead ends: 58692 [2020-10-28 18:17:22,988 INFO L226 Difference]: Without dead ends: 39689 [2020-10-28 18:17:23,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39689 states. [2020-10-28 18:17:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39689 to 39686. [2020-10-28 18:17:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39686 states. [2020-10-28 18:17:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39686 states to 39686 states and 59133 transitions. [2020-10-28 18:17:25,167 INFO L78 Accepts]: Start accepts. Automaton has 39686 states and 59133 transitions. Word has length 311 [2020-10-28 18:17:25,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:25,168 INFO L481 AbstractCegarLoop]: Abstraction has 39686 states and 59133 transitions. [2020-10-28 18:17:25,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 39686 states and 59133 transitions. [2020-10-28 18:17:25,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-28 18:17:25,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:25,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:25,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:17:25,239 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1018385077, now seen corresponding path program 1 times [2020-10-28 18:17:25,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:25,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649970340] [2020-10-28 18:17:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:25,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:30,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:30,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-28 18:17:30,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:17:30,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-28 18:17:30,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:30,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:17:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 18:17:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 18:17:30,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:31,142 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:17:31,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:31,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:31,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:31,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:31,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:31,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:17:31,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:31,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:31,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:31,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:31,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:31,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:31,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649970340] [2020-10-28 18:17:31,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:31,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:17:31,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703383079] [2020-10-28 18:17:31,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:17:31,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:17:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:17:31,299 INFO L87 Difference]: Start difference. First operand 39686 states and 59133 transitions. Second operand 4 states. [2020-10-28 18:17:41,173 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:17:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:44,194 INFO L93 Difference]: Finished difference Result 112972 states and 167217 transitions. [2020-10-28 18:17:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:17:44,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-28 18:17:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:44,337 INFO L225 Difference]: With dead ends: 112972 [2020-10-28 18:17:44,337 INFO L226 Difference]: Without dead ends: 76937 [2020-10-28 18:17:44,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76937 states. [2020-10-28 18:17:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76937 to 76934. [2020-10-28 18:17:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76934 states. [2020-10-28 18:17:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76934 states to 76934 states and 113677 transitions. [2020-10-28 18:17:49,261 INFO L78 Accepts]: Start accepts. Automaton has 76934 states and 113677 transitions. Word has length 313 [2020-10-28 18:17:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:49,261 INFO L481 AbstractCegarLoop]: Abstraction has 76934 states and 113677 transitions. [2020-10-28 18:17:49,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:17:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 76934 states and 113677 transitions. [2020-10-28 18:17:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-28 18:17:49,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:49,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:49,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:17:49,360 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1842270576, now seen corresponding path program 1 times [2020-10-28 18:17:49,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:49,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914678742] [2020-10-28 18:17:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:49,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:50,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:50,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:50,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:50,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:50,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:50,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:50,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:54,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:54,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-28 18:17:54,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:17:54,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 18:17:54,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:54,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 18:17:54,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:55,191 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:17:55,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:55,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:55,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:55,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:55,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:55,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:17:55,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:55,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:55,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:55,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:55,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:55,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:55,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914678742] [2020-10-28 18:17:55,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:55,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:55,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150084791] [2020-10-28 18:17:55,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:55,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:55,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:55,376 INFO L87 Difference]: Start difference. First operand 76934 states and 113677 transitions. Second operand 5 states. [2020-10-28 18:18:08,503 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:18:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:12,500 INFO L93 Difference]: Finished difference Result 224692 states and 330971 transitions. [2020-10-28 18:18:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:12,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 313 [2020-10-28 18:18:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:12,808 INFO L225 Difference]: With dead ends: 224692 [2020-10-28 18:18:12,808 INFO L226 Difference]: Without dead ends: 149713 [2020-10-28 18:18:12,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149713 states. [2020-10-28 18:18:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149713 to 149710. [2020-10-28 18:18:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149710 states. [2020-10-28 18:18:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149710 states to 149710 states and 218895 transitions. [2020-10-28 18:18:22,466 INFO L78 Accepts]: Start accepts. Automaton has 149710 states and 218895 transitions. Word has length 313 [2020-10-28 18:18:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:22,466 INFO L481 AbstractCegarLoop]: Abstraction has 149710 states and 218895 transitions. [2020-10-28 18:18:22,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 149710 states and 218895 transitions. [2020-10-28 18:18:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 18:18:22,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:22,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:18:22,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:18:22,896 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash -22602722, now seen corresponding path program 1 times [2020-10-28 18:18:22,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:22,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046256211] [2020-10-28 18:18:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:22,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:27,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:27,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 18:18:27,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:18:27,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 18:18:27,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:27,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:27,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:27,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:27,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 18:18:27,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:28,756 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:18:28,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:28,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:28,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:28,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:28,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:28,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:18:28,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:28,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:28,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:28,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:28,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:28,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:28,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046256211] [2020-10-28 18:18:28,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:28,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:28,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742122071] [2020-10-28 18:18:28,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:28,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:28,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:28,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:28,916 INFO L87 Difference]: Start difference. First operand 149710 states and 218895 transitions. Second operand 5 states. [2020-10-28 18:18:50,227 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:18:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:57,238 INFO L93 Difference]: Finished difference Result 436536 states and 635625 transitions. [2020-10-28 18:18:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:57,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2020-10-28 18:18:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:57,910 INFO L225 Difference]: With dead ends: 436536 [2020-10-28 18:18:57,911 INFO L226 Difference]: Without dead ends: 293549 [2020-10-28 18:18:58,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293549 states.