/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:05:13,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:05:13,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:05:13,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:05:13,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:05:13,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:05:13,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:05:13,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:05:13,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:05:13,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:05:13,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:05:13,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:05:13,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:05:13,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:05:13,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:05:13,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:05:13,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:05:13,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:05:13,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:05:13,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:05:13,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:05:13,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:05:13,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:05:13,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:05:13,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:05:13,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:05:13,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:05:13,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:05:13,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:05:13,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:05:13,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:05:13,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:05:13,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:05:13,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:05:13,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:05:13,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:05:13,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:05:13,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:05:13,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:05:13,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:05:13,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:05:13,947 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 [2020-10-29 13:05:13,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:05:13,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:05:14,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:05:14,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:05:14,001 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:05:14,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:05:14,002 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:05:14,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:05:14,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:05:14,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:05:14,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:05:14,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:05:14,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:05:14,004 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:05:14,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:05:14,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:05:14,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:05:14,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:05:14,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:05:14,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:05:14,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:05:14,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:05:14,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:05:14,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:05:14,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:05:14,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:05:14,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:05:14,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:05:14,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:05:14,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:05:14,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:05:14,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:05:14,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:05:14,441 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:05:14,442 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:05:14,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:05:14,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a1067c7fb/3b7a68e1842f43d49cdce07b25fef1af/FLAGbf42b0e8a [2020-10-29 13:05:15,416 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:05:15,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:05:15,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a1067c7fb/3b7a68e1842f43d49cdce07b25fef1af/FLAGbf42b0e8a [2020-10-29 13:05:15,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a1067c7fb/3b7a68e1842f43d49cdce07b25fef1af [2020-10-29 13:05:15,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:05:15,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:05:15,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:05:15,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:05:15,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:05:15,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:05:15" (1/1) ... [2020-10-29 13:05:15,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722d9ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:15, skipping insertion in model container [2020-10-29 13:05:15,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:05:15" (1/1) ... [2020-10-29 13:05:15,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:05:15,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:05:16,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:05:16,930 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:05:17,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:05:17,329 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:05:17,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:17 WrapperNode [2020-10-29 13:05:17,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:05:17,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:05:17,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:05:17,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:05:17,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:17" (1/1) ... [2020-10-29 13:05:17,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:17" (1/1) ... [2020-10-29 13:05:17,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:17" (1/1) ... [2020-10-29 13:05:17,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:17" (1/1) ... [2020-10-29 13:05:17,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:17" (1/1) ... [2020-10-29 13:05:17,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:17" (1/1) ... [2020-10-29 13:05:17,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:17" (1/1) ... [2020-10-29 13:05:17,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:05:17,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:05:17,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:05:17,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:05:17,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:17" (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 [2020-10-29 13:05:17,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:05:17,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:05:17,642 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:05:17,642 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:05:17,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:05:17,643 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:05:17,644 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:05:17,644 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:05:17,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:05:17,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:05:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:05:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:05:17,647 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:05:17,647 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:05:17,647 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:05:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:05:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:05:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:05:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:05:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:05:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:05:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:05:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:05:17,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:05:17,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:05:17,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:05:17,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:05:17,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:05:20,612 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:05:20,613 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:05:20,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:05:20 BoogieIcfgContainer [2020-10-29 13:05:20,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:05:20,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:05:20,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:05:20,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:05:20,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:05:15" (1/3) ... [2020-10-29 13:05:20,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba26773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:05:20, skipping insertion in model container [2020-10-29 13:05:20,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:17" (2/3) ... [2020-10-29 13:05:20,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba26773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:05:20, skipping insertion in model container [2020-10-29 13:05:20,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:05:20" (3/3) ... [2020-10-29 13:05:20,627 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:05:20,640 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:05:20,646 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:05:20,660 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:05:20,695 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:05:20,695 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:05:20,696 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:05:20,696 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:05:20,696 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:05:20,696 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:05:20,696 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:05:20,696 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:05:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states. [2020-10-29 13:05:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-29 13:05:20,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:05:20,759 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] [2020-10-29 13:05:20,759 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:05:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:05:20,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2113566534, now seen corresponding path program 1 times [2020-10-29 13:05:20,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:05:20,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064136745] [2020-10-29 13:05:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:05:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:22,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:23,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:23,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:24,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:24,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:24,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:25,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:25,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:25,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:25,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:25,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:26,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:26,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:26,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-29 13:05:26,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:05:26,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 13:05:26,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:26,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:26,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:05:26,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:05:26,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-29 13:05:26,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:05:27,460 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2020-10-29 13:05:28,223 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:05:28,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:05:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:28,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:28,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:28,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:05:28,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:05:28,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 13:05:28,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:28,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:05:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:05:28,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:05:28,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:05:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:05:28,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064136745] [2020-10-29 13:05:28,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:05:28,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:05:28,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447211549] [2020-10-29 13:05:28,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:05:28,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:05:28,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:05:28,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:05:28,650 INFO L87 Difference]: Start difference. First operand 712 states. Second operand 5 states. [2020-10-29 13:05:37,609 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:05:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:05:39,605 INFO L93 Difference]: Finished difference Result 2050 states and 3659 transitions. [2020-10-29 13:05:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:05:39,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 305 [2020-10-29 13:05:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:05:39,643 INFO L225 Difference]: With dead ends: 2050 [2020-10-29 13:05:39,643 INFO L226 Difference]: Without dead ends: 1381 [2020-10-29 13:05:39,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:05:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2020-10-29 13:05:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1378. [2020-10-29 13:05:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1378 states. [2020-10-29 13:05:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 2131 transitions. [2020-10-29 13:05:39,884 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 2131 transitions. Word has length 305 [2020-10-29 13:05:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:05:39,888 INFO L481 AbstractCegarLoop]: Abstraction has 1378 states and 2131 transitions. [2020-10-29 13:05:39,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:05:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 2131 transitions. [2020-10-29 13:05:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-29 13:05:39,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:05:39,906 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] [2020-10-29 13:05:39,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:05:39,910 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:05:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:05:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash -501741917, now seen corresponding path program 1 times [2020-10-29 13:05:39,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:05:39,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991869682] [2020-10-29 13:05:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:05:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:40,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:40,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:40,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:40,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:40,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:41,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:41,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:41,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:41,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:41,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:41,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:42,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:42,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:44,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:44,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:45,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:45,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-29 13:05:45,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:05:45,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:05:45,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:45,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:45,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:05:45,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:05:45,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-29 13:05:45,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:05:45,964 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:05:45,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:05:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:46,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:46,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:05:46,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:05:46,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:05:46,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:46,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:05:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:05:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:05:46,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:05:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:05:46,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991869682] [2020-10-29 13:05:46,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:05:46,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:05:46,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881012510] [2020-10-29 13:05:46,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:05:46,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:05:46,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:05:46,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:05:46,385 INFO L87 Difference]: Start difference. First operand 1378 states and 2131 transitions. Second operand 4 states. [2020-10-29 13:05:53,910 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2020-10-29 13:05:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:05:55,725 INFO L93 Difference]: Finished difference Result 3951 states and 6078 transitions. [2020-10-29 13:05:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:05:55,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 307 [2020-10-29 13:05:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:05:55,746 INFO L225 Difference]: With dead ends: 3951 [2020-10-29 13:05:55,746 INFO L226 Difference]: Without dead ends: 2702 [2020-10-29 13:05:55,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:05:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2020-10-29 13:05:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2699. [2020-10-29 13:05:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2699 states. [2020-10-29 13:05:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 4153 transitions. [2020-10-29 13:05:55,913 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 4153 transitions. Word has length 307 [2020-10-29 13:05:55,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:05:55,914 INFO L481 AbstractCegarLoop]: Abstraction has 2699 states and 4153 transitions. [2020-10-29 13:05:55,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:05:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 4153 transitions. [2020-10-29 13:05:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-29 13:05:55,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:05:55,925 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] [2020-10-29 13:05:55,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:05:55,926 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:05:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:05:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash -345077954, now seen corresponding path program 1 times [2020-10-29 13:05:55,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:05:55,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099719760] [2020-10-29 13:05:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:05:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:55,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:57,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:57,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:57,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:57,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:57,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:57,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:57,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:58,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:58,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:59,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:59,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:01,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:01,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-29 13:06:01,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:06:01,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-29 13:06:01,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:01,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-29 13:06:01,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:01,832 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:06:01,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:01,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:01,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:01,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:01,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:01,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:06:01,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:01,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:01,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:02,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099719760] [2020-10-29 13:06:02,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:02,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:02,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554020627] [2020-10-29 13:06:02,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:02,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:02,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:02,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:02,108 INFO L87 Difference]: Start difference. First operand 2699 states and 4153 transitions. Second operand 5 states. [2020-10-29 13:06:08,592 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:06:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:10,274 INFO L93 Difference]: Finished difference Result 7871 states and 12071 transitions. [2020-10-29 13:06:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:10,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 307 [2020-10-29 13:06:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:10,302 INFO L225 Difference]: With dead ends: 7871 [2020-10-29 13:06:10,302 INFO L226 Difference]: Without dead ends: 5190 [2020-10-29 13:06:10,309 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 [2020-10-29 13:06:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2020-10-29 13:06:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 5187. [2020-10-29 13:06:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5187 states. [2020-10-29 13:06:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 7893 transitions. [2020-10-29 13:06:10,599 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 7893 transitions. Word has length 307 [2020-10-29 13:06:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:10,601 INFO L481 AbstractCegarLoop]: Abstraction has 5187 states and 7893 transitions. [2020-10-29 13:06:10,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 7893 transitions. [2020-10-29 13:06:10,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-29 13:06:10,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:10,616 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] [2020-10-29 13:06:10,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:06:10,617 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:10,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1439485031, now seen corresponding path program 1 times [2020-10-29 13:06:10,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:10,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317810581] [2020-10-29 13:06:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:10,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:10,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:10,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:11,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:11,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:11,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:11,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:11,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:12,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:12,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:12,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:12,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:13,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:13,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:13,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:15,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:15,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-29 13:06:15,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:06:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-29 13:06:15,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:15,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-29 13:06:15,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:16,563 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:06:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:16,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:16,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:16,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:16,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:16,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:06:16,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:16,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:16,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:16,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:16,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:16,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:16,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317810581] [2020-10-29 13:06:16,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:16,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:16,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669105855] [2020-10-29 13:06:16,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:16,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:16,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:16,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:16,747 INFO L87 Difference]: Start difference. First operand 5187 states and 7893 transitions. Second operand 5 states. [2020-10-29 13:06:23,564 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:06:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:25,397 INFO L93 Difference]: Finished difference Result 15286 states and 23224 transitions. [2020-10-29 13:06:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:25,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2020-10-29 13:06:25,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:25,446 INFO L225 Difference]: With dead ends: 15286 [2020-10-29 13:06:25,446 INFO L226 Difference]: Without dead ends: 10186 [2020-10-29 13:06:25,458 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 [2020-10-29 13:06:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2020-10-29 13:06:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 10183. [2020-10-29 13:06:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10183 states. [2020-10-29 13:06:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10183 states to 10183 states and 15387 transitions. [2020-10-29 13:06:26,076 INFO L78 Accepts]: Start accepts. Automaton has 10183 states and 15387 transitions. Word has length 309 [2020-10-29 13:06:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:26,077 INFO L481 AbstractCegarLoop]: Abstraction has 10183 states and 15387 transitions. [2020-10-29 13:06:26,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10183 states and 15387 transitions. [2020-10-29 13:06:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-29 13:06:26,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:26,101 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] [2020-10-29 13:06:26,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:06:26,101 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:26,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:26,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1216581353, now seen corresponding path program 1 times [2020-10-29 13:06:26,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:26,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131042316] [2020-10-29 13:06:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:26,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:26,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:27,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:27,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:27,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:27,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:30,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:30,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:30,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:31,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:31,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:31,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:31,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-29 13:06:31,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:06:31,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-29 13:06:31,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:31,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:31,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:31,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:31,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-29 13:06:31,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:32,163 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:06:32,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:32,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:32,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:32,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:32,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:32,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:06:32,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:32,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:32,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:32,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:32,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:32,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:32,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131042316] [2020-10-29 13:06:32,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:32,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:32,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700881030] [2020-10-29 13:06:32,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:32,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:32,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:32,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:32,335 INFO L87 Difference]: Start difference. First operand 10183 states and 15387 transitions. Second operand 5 states. [2020-10-29 13:06:39,131 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:06:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:40,945 INFO L93 Difference]: Finished difference Result 29857 states and 45009 transitions. [2020-10-29 13:06:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:40,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 311 [2020-10-29 13:06:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:41,010 INFO L225 Difference]: With dead ends: 29857 [2020-10-29 13:06:41,010 INFO L226 Difference]: Without dead ends: 19858 [2020-10-29 13:06:41,033 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 [2020-10-29 13:06:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19858 states. [2020-10-29 13:06:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19858 to 19855. [2020-10-29 13:06:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19855 states. [2020-10-29 13:06:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19855 states to 19855 states and 29735 transitions. [2020-10-29 13:06:42,038 INFO L78 Accepts]: Start accepts. Automaton has 19855 states and 29735 transitions. Word has length 311 [2020-10-29 13:06:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:42,039 INFO L481 AbstractCegarLoop]: Abstraction has 19855 states and 29735 transitions. [2020-10-29 13:06:42,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 19855 states and 29735 transitions. [2020-10-29 13:06:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-29 13:06:42,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:42,080 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] [2020-10-29 13:06:42,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:06:42,080 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:42,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:42,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1699896386, now seen corresponding path program 1 times [2020-10-29 13:06:42,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:42,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938996359] [2020-10-29 13:06:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:42,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:42,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:42,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:42,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:42,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:42,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:43,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:45,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:45,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:45,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:45,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:45,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:46,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:46,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:47,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:47,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 13:06:47,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:06:47,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:06:47,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:47,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-29 13:06:47,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:48,030 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:06:48,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:48,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:48,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:48,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:48,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:48,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:06:48,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:48,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:48,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:48,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:48,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:48,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:48,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938996359] [2020-10-29 13:06:48,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:48,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:48,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958561477] [2020-10-29 13:06:48,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:48,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:48,250 INFO L87 Difference]: Start difference. First operand 19855 states and 29735 transitions. Second operand 5 states. [2020-10-29 13:06:55,699 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:06:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:57,827 INFO L93 Difference]: Finished difference Result 57695 states and 86057 transitions. [2020-10-29 13:06:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:57,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 313 [2020-10-29 13:06:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:57,924 INFO L225 Difference]: With dead ends: 57695 [2020-10-29 13:06:57,925 INFO L226 Difference]: Without dead ends: 38506 [2020-10-29 13:06:57,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:06:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38506 states. [2020-10-29 13:07:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38506 to 38503. [2020-10-29 13:07:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38503 states. [2020-10-29 13:07:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38503 states to 38503 states and 57040 transitions. [2020-10-29 13:07:00,152 INFO L78 Accepts]: Start accepts. Automaton has 38503 states and 57040 transitions. Word has length 313 [2020-10-29 13:07:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:00,152 INFO L481 AbstractCegarLoop]: Abstraction has 38503 states and 57040 transitions. [2020-10-29 13:07:00,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:07:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 38503 states and 57040 transitions. [2020-10-29 13:07:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-29 13:07:00,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:00,210 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] [2020-10-29 13:07:00,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:07:00,210 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:00,211 INFO L82 PathProgramCache]: Analyzing trace with hash 196376534, now seen corresponding path program 1 times [2020-10-29 13:07:00,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:00,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007165896] [2020-10-29 13:07:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:00,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:02,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:02,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:04,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:04,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:05,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:05,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:05,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:05,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-29 13:07:05,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:07:05,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-29 13:07:05,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:05,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:07:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:07:05,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-29 13:07:05,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:06,082 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:07:06,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:06,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:06,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:06,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:06,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:06,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:07:06,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:06,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:06,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:07:06,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:07:06,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:07:06,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007165896] [2020-10-29 13:07:06,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:06,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:07:06,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640653651] [2020-10-29 13:07:06,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:07:06,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:06,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:07:06,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:07:06,227 INFO L87 Difference]: Start difference. First operand 38503 states and 57040 transitions. Second operand 5 states. [2020-10-29 13:07:14,886 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:07:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:07:17,440 INFO L93 Difference]: Finished difference Result 113000 states and 167061 transitions. [2020-10-29 13:07:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:07:17,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2020-10-29 13:07:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:07:17,588 INFO L225 Difference]: With dead ends: 113000 [2020-10-29 13:07:17,588 INFO L226 Difference]: Without dead ends: 75057 [2020-10-29 13:07:17,664 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 [2020-10-29 13:07:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75057 states. [2020-10-29 13:07:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75057 to 75054. [2020-10-29 13:07:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75054 states. [2020-10-29 13:07:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75054 states to 75054 states and 110140 transitions. [2020-10-29 13:07:22,109 INFO L78 Accepts]: Start accepts. Automaton has 75054 states and 110140 transitions. Word has length 315 [2020-10-29 13:07:22,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:22,109 INFO L481 AbstractCegarLoop]: Abstraction has 75054 states and 110140 transitions. [2020-10-29 13:07:22,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:07:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 75054 states and 110140 transitions. [2020-10-29 13:07:22,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-29 13:07:22,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:22,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:07:22,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:07:22,202 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:22,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1123581381, now seen corresponding path program 1 times [2020-10-29 13:07:22,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:22,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171933196] [2020-10-29 13:07:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:22,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:23,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:23,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:27,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:27,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:27,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:27,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:27,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:27,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-29 13:07:27,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:07:27,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-29 13:07:27,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:27,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:27,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:07:27,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-29 13:07:27,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-29 13:07:27,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:28,069 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:07:28,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:28,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:28,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:28,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:28,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:28,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:07:28,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:28,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:28,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:07:28,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:28,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:07:28,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:07:28,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171933196] [2020-10-29 13:07:28,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:28,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:07:28,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111084392] [2020-10-29 13:07:28,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:07:28,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:28,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:07:28,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:07:28,204 INFO L87 Difference]: Start difference. First operand 75054 states and 110140 transitions. Second operand 4 states. [2020-10-29 13:07:40,373 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2020-10-29 13:07:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:07:44,158 INFO L93 Difference]: Finished difference Result 219184 states and 320922 transitions. [2020-10-29 13:07:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:07:44,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 317 [2020-10-29 13:07:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:07:44,463 INFO L225 Difference]: With dead ends: 219184 [2020-10-29 13:07:44,463 INFO L226 Difference]: Without dead ends: 146325 [2020-10-29 13:07:44,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:07:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146325 states. [2020-10-29 13:07:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146325 to 146322. [2020-10-29 13:07:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146322 states. [2020-10-29 13:07:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146322 states to 146322 states and 212926 transitions. [2020-10-29 13:07:52,807 INFO L78 Accepts]: Start accepts. Automaton has 146322 states and 212926 transitions. Word has length 317 [2020-10-29 13:07:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:52,808 INFO L481 AbstractCegarLoop]: Abstraction has 146322 states and 212926 transitions. [2020-10-29 13:07:52,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:07:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 146322 states and 212926 transitions. [2020-10-29 13:07:53,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-29 13:07:53,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:53,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:07:53,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:07:53,004 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:53,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1065159301, now seen corresponding path program 1 times [2020-10-29 13:07:53,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:53,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145647927] [2020-10-29 13:07:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:53,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:57,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:57,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:58,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:58,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-29 13:07:58,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:07:58,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:07:58,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:58,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:07:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:07:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-29 13:07:58,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:58,939 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:07:58,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:58,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:58,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:58,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:58,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:58,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:07:58,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:58,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:58,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:07:58,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:58,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:07:58,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:07:59,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145647927] [2020-10-29 13:07:59,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:59,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:07:59,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348508528] [2020-10-29 13:07:59,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:07:59,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:59,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:07:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:07:59,257 INFO L87 Difference]: Start difference. First operand 146322 states and 212926 transitions. Second operand 5 states. [2020-10-29 13:08:14,033 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:08:18,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:08:18,195 INFO L93 Difference]: Finished difference Result 308216 states and 447818 transitions. [2020-10-29 13:08:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:08:18,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-10-29 13:08:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:08:18,446 INFO L225 Difference]: With dead ends: 308216 [2020-10-29 13:08:18,446 INFO L226 Difference]: Without dead ends: 167381 [2020-10-29 13:08:18,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:08:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167381 states. [2020-10-29 13:08:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167381 to 146694. [2020-10-29 13:08:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146694 states. [2020-10-29 13:08:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146694 states to 146694 states and 213523 transitions. [2020-10-29 13:08:28,264 INFO L78 Accepts]: Start accepts. Automaton has 146694 states and 213523 transitions. Word has length 317 [2020-10-29 13:08:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:08:28,265 INFO L481 AbstractCegarLoop]: Abstraction has 146694 states and 213523 transitions. [2020-10-29 13:08:28,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:08:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 146694 states and 213523 transitions. [2020-10-29 13:08:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-29 13:08:28,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:08:28,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:08:28,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:08:28,430 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:08:28,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:08:28,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1839567384, now seen corresponding path program 1 times [2020-10-29 13:08:28,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:08:28,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119172238] [2020-10-29 13:08:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:08:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:28,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:28,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:28,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:28,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:28,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:29,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:29,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:29,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:29,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:29,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:29,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:29,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:33,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:33,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-29 13:08:33,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:08:33,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 13:08:33,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:33,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:08:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-29 13:08:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 13:08:33,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:34,255 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:08:34,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:08:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:34,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:34,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:34,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:08:34,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:08:34,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:08:34,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:34,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:08:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:08:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:08:34,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:08:34,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119172238] [2020-10-29 13:08:34,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:08:34,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:08:34,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215936325] [2020-10-29 13:08:34,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:08:34,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:08:34,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:08:34,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:08:34,372 INFO L87 Difference]: Start difference. First operand 146694 states and 213523 transitions. Second operand 5 states.