/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:20:50,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:20:50,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:20:50,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:20:50,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:20:50,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:20:50,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:20:50,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:20:50,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:20:50,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:20:50,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:20:50,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:20:50,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:20:50,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:20:50,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:20:50,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:20:50,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:20:50,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:20:50,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:20:50,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:20:50,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:20:50,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:20:50,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:20:50,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:20:50,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:20:50,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:20:50,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:20:50,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:20:50,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:20:50,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:20:50,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:20:50,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:20:50,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:20:50,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:20:50,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:20:50,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:20:50,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:20:50,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:20:50,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:20:50,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:20:50,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:20:50,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 19:20:50,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:20:50,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:20:50,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:20:50,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:20:50,533 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:20:50,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:20:50,533 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:20:50,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:20:50,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:20:50,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:20:50,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:20:50,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:20:50,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:20:50,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:20:50,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:20:50,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:20:50,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:20:50,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:20:50,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:20:50,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:20:50,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:20:50,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:20:50,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:20:50,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:20:50,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:20:50,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:20:50,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:20:50,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:20:50,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:20:50,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:20:50,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:20:51,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:20:51,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:20:51,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:20:51,028 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:20:51,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:20:51,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9294d4c6a/41bc67f1656a4c2b95d485d2468d0a6f/FLAGafb7c2d1a [2020-10-28 19:20:51,948 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:20:51,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:20:51,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9294d4c6a/41bc67f1656a4c2b95d485d2468d0a6f/FLAGafb7c2d1a [2020-10-28 19:20:52,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9294d4c6a/41bc67f1656a4c2b95d485d2468d0a6f [2020-10-28 19:20:52,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:20:52,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:20:52,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:20:52,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:20:52,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:20:52,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:20:52" (1/1) ... [2020-10-28 19:20:52,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d7d9d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:52, skipping insertion in model container [2020-10-28 19:20:52,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:20:52" (1/1) ... [2020-10-28 19:20:52,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:20:52,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:20:53,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:20:53,180 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:20:53,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:20:53,639 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:20:53,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:53 WrapperNode [2020-10-28 19:20:53,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:20:53,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:20:53,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:20:53,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:20:53,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:53" (1/1) ... [2020-10-28 19:20:53,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:53" (1/1) ... [2020-10-28 19:20:53,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:53" (1/1) ... [2020-10-28 19:20:53,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:53" (1/1) ... [2020-10-28 19:20:53,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:53" (1/1) ... [2020-10-28 19:20:53,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:53" (1/1) ... [2020-10-28 19:20:53,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:53" (1/1) ... [2020-10-28 19:20:53,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:20:53,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:20:53,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:20:53,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:20:53,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:20:53,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:20:53,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:20:53,915 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:20:53,915 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:20:53,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:20:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:20:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:20:53,917 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:20:53,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:20:53,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:20:53,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:20:53,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:20:53,918 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:20:53,918 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:20:53,918 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:20:53,919 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:20:53,920 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:20:53,920 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:20:53,920 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:20:53,920 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:20:53,920 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:20:53,920 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:20:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:20:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:20:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:20:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:20:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:20:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:20:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:20:57,657 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:20:57,657 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:20:57,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:20:57 BoogieIcfgContainer [2020-10-28 19:20:57,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:20:57,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:20:57,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:20:57,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:20:57,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:20:52" (1/3) ... [2020-10-28 19:20:57,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69862782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:20:57, skipping insertion in model container [2020-10-28 19:20:57,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:53" (2/3) ... [2020-10-28 19:20:57,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69862782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:20:57, skipping insertion in model container [2020-10-28 19:20:57,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:20:57" (3/3) ... [2020-10-28 19:20:57,669 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:20:57,681 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:20:57,686 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:20:57,699 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:20:57,732 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:20:57,732 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:20:57,732 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:20:57,732 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:20:57,733 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:20:57,733 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:20:57,733 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:20:57,733 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:20:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states. [2020-10-28 19:20:57,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 19:20:57,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:57,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:20:57,798 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:57,804 INFO L82 PathProgramCache]: Analyzing trace with hash 471360347, now seen corresponding path program 1 times [2020-10-28 19:20:57,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:57,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350900985] [2020-10-28 19:20:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:58,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:59,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:59,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:00,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:00,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:01,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:01,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:01,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:01,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:01,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:02,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:02,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:03,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:03,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:03,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:03,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 19:21:03,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:21:03,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-28 19:21:03,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:03,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:03,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:21:03,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 19:21:03,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-28 19:21:03,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:21:05,005 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:21:05,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:05,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:05,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:05,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:05,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:05,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 19:21:05,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:05,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:05,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:05,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:05,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:05,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:05,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350900985] [2020-10-28 19:21:05,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:05,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:21:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332605357] [2020-10-28 19:21:05,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:21:05,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:05,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:21:05,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:21:05,301 INFO L87 Difference]: Start difference. First operand 812 states. Second operand 4 states. [2020-10-28 19:21:06,630 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 19:21:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:13,552 INFO L93 Difference]: Finished difference Result 1533 states and 2691 transitions. [2020-10-28 19:21:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:21:13,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-28 19:21:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:13,597 INFO L225 Difference]: With dead ends: 1533 [2020-10-28 19:21:13,598 INFO L226 Difference]: Without dead ends: 1313 [2020-10-28 19:21:13,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2020-10-28 19:21:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1310. [2020-10-28 19:21:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-10-28 19:21:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2041 transitions. [2020-10-28 19:21:13,778 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2041 transitions. Word has length 331 [2020-10-28 19:21:13,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:13,784 INFO L481 AbstractCegarLoop]: Abstraction has 1310 states and 2041 transitions. [2020-10-28 19:21:13,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:21:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2041 transitions. [2020-10-28 19:21:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 19:21:13,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:13,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:21:13,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:21:13,808 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:13,809 INFO L82 PathProgramCache]: Analyzing trace with hash -834488451, now seen corresponding path program 1 times [2020-10-28 19:21:13,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:13,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465449253] [2020-10-28 19:21:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:13,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:14,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:14,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:14,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:15,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:15,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:15,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:15,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:15,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:15,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:16,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:16,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:16,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:16,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:17,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:17,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:18,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:18,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 19:21:18,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:21:18,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-28 19:21:18,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:18,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:21:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 19:21:18,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-10-28 19:21:18,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:20,308 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:21:20,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:20,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:20,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:20,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:20,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:20,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:21:20,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:20,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:20,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:20,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465449253] [2020-10-28 19:21:20,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:20,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:21:20,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058611919] [2020-10-28 19:21:20,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:21:20,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:20,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:21:20,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:21:20,576 INFO L87 Difference]: Start difference. First operand 1310 states and 2041 transitions. Second operand 4 states. [2020-10-28 19:21:21,984 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 19:21:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:27,810 INFO L93 Difference]: Finished difference Result 2686 states and 4216 transitions. [2020-10-28 19:21:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:21:27,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-28 19:21:27,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:27,825 INFO L225 Difference]: With dead ends: 2686 [2020-10-28 19:21:27,825 INFO L226 Difference]: Without dead ends: 2303 [2020-10-28 19:21:27,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2020-10-28 19:21:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2300. [2020-10-28 19:21:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2300 states. [2020-10-28 19:21:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3577 transitions. [2020-10-28 19:21:27,932 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3577 transitions. Word has length 331 [2020-10-28 19:21:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:27,933 INFO L481 AbstractCegarLoop]: Abstraction has 2300 states and 3577 transitions. [2020-10-28 19:21:27,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:21:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3577 transitions. [2020-10-28 19:21:27,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 19:21:27,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:27,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:21:27,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:21:27,943 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:27,943 INFO L82 PathProgramCache]: Analyzing trace with hash -159708538, now seen corresponding path program 1 times [2020-10-28 19:21:27,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:27,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309031620] [2020-10-28 19:21:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:28,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:28,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:28,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:33,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:33,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 19:21:33,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:21:33,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 19:21:33,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:33,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:21:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 19:21:33,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-28 19:21:33,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:34,423 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:21:34,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:34,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:34,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:34,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:34,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:34,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:21:34,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:34,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:34,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:34,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:34,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:34,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:34,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309031620] [2020-10-28 19:21:34,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:34,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:21:34,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825951239] [2020-10-28 19:21:34,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:21:34,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:34,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:21:34,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:21:34,679 INFO L87 Difference]: Start difference. First operand 2300 states and 3577 transitions. Second operand 4 states. [2020-10-28 19:21:35,952 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 19:21:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:41,780 INFO L93 Difference]: Finished difference Result 4870 states and 7637 transitions. [2020-10-28 19:21:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:21:41,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-28 19:21:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:41,805 INFO L225 Difference]: With dead ends: 4870 [2020-10-28 19:21:41,805 INFO L226 Difference]: Without dead ends: 4203 [2020-10-28 19:21:41,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:41,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2020-10-28 19:21:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4200. [2020-10-28 19:21:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4200 states. [2020-10-28 19:21:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 6517 transitions. [2020-10-28 19:21:41,963 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 6517 transitions. Word has length 331 [2020-10-28 19:21:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:41,964 INFO L481 AbstractCegarLoop]: Abstraction has 4200 states and 6517 transitions. [2020-10-28 19:21:41,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:21:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 6517 transitions. [2020-10-28 19:21:41,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 19:21:41,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:41,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:21:41,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:21:41,976 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1289694683, now seen corresponding path program 1 times [2020-10-28 19:21:41,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:41,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164274730] [2020-10-28 19:21:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:42,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:42,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:42,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:42,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:43,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:43,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:43,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:43,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:43,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:43,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:43,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:44,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:44,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:44,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:44,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:47,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:47,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 19:21:47,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:21:47,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 19:21:47,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:47,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:47,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:21:47,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:21:47,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-28 19:21:47,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:48,637 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:21:48,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:48,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:48,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:48,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:48,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:21:48,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:48,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:48,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:48,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:48,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:48,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:48,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164274730] [2020-10-28 19:21:48,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:48,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:21:48,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266493633] [2020-10-28 19:21:48,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:21:48,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:48,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:21:48,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:48,922 INFO L87 Difference]: Start difference. First operand 4200 states and 6517 transitions. Second operand 5 states. [2020-10-28 19:21:58,059 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:22:00,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:00,792 INFO L93 Difference]: Finished difference Result 12381 states and 19182 transitions. [2020-10-28 19:22:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:00,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-28 19:22:00,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:00,836 INFO L225 Difference]: With dead ends: 12381 [2020-10-28 19:22:00,836 INFO L226 Difference]: Without dead ends: 8232 [2020-10-28 19:22:00,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2020-10-28 19:22:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8229. [2020-10-28 19:22:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2020-10-28 19:22:01,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 12697 transitions. [2020-10-28 19:22:01,272 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 12697 transitions. Word has length 331 [2020-10-28 19:22:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:01,272 INFO L481 AbstractCegarLoop]: Abstraction has 8229 states and 12697 transitions. [2020-10-28 19:22:01,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 12697 transitions. [2020-10-28 19:22:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 19:22:01,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:01,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:22:01,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:22:01,295 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1375168706, now seen corresponding path program 1 times [2020-10-28 19:22:01,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:01,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008546555] [2020-10-28 19:22:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:01,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:01,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:01,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:01,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:02,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:02,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:02,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:02,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:02,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:03,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:03,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:03,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:03,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:04,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:06,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 19:22:06,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:22:06,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 19:22:06,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:06,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:06,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:06,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:06,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-28 19:22:06,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:07,835 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:22:07,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:07,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:07,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:07,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:07,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:07,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:22:07,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:07,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:07,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:22:08,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008546555] [2020-10-28 19:22:08,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:08,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:08,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728247485] [2020-10-28 19:22:08,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:08,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:08,113 INFO L87 Difference]: Start difference. First operand 8229 states and 12697 transitions. Second operand 5 states. [2020-10-28 19:22:17,214 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:22:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:20,084 INFO L93 Difference]: Finished difference Result 24314 states and 37466 transitions. [2020-10-28 19:22:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:20,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-10-28 19:22:20,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:20,155 INFO L225 Difference]: With dead ends: 24314 [2020-10-28 19:22:20,155 INFO L226 Difference]: Without dead ends: 16138 [2020-10-28 19:22:20,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-10-28 19:22:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16135. [2020-10-28 19:22:21,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16135 states. [2020-10-28 19:22:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16135 states to 16135 states and 24745 transitions. [2020-10-28 19:22:21,089 INFO L78 Accepts]: Start accepts. Automaton has 16135 states and 24745 transitions. Word has length 333 [2020-10-28 19:22:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:21,089 INFO L481 AbstractCegarLoop]: Abstraction has 16135 states and 24745 transitions. [2020-10-28 19:22:21,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 16135 states and 24745 transitions. [2020-10-28 19:22:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-28 19:22:21,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:21,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:22:21,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:22:21,120 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:21,121 INFO L82 PathProgramCache]: Analyzing trace with hash -462135368, now seen corresponding path program 1 times [2020-10-28 19:22:21,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:21,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045774298] [2020-10-28 19:22:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:21,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:21,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:21,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:21,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:21,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:21,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:21,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:22,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:22,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:22,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:22,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:22,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:23,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:26,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:26,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-28 19:22:26,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:22:26,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 19:22:26,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:26,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:26,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:26,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:26,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 19:22:26,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:27,640 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:22:27,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:27,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:27,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:27,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:27,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:27,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:22:27,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:27,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:27,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:27,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:27,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:27,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:22:27,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045774298] [2020-10-28 19:22:27,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:27,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:27,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782191244] [2020-10-28 19:22:27,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:27,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:27,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:27,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:27,803 INFO L87 Difference]: Start difference. First operand 16135 states and 24745 transitions. Second operand 5 states. [2020-10-28 19:22:36,622 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:22:39,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:39,547 INFO L93 Difference]: Finished difference Result 47646 states and 72951 transitions. [2020-10-28 19:22:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:39,548 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-10-28 19:22:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:39,613 INFO L225 Difference]: With dead ends: 47646 [2020-10-28 19:22:39,613 INFO L226 Difference]: Without dead ends: 31587 [2020-10-28 19:22:39,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31587 states. [2020-10-28 19:22:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31587 to 31584. [2020-10-28 19:22:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31584 states. [2020-10-28 19:22:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31584 states to 31584 states and 48103 transitions. [2020-10-28 19:22:41,512 INFO L78 Accepts]: Start accepts. Automaton has 31584 states and 48103 transitions. Word has length 335 [2020-10-28 19:22:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:41,513 INFO L481 AbstractCegarLoop]: Abstraction has 31584 states and 48103 transitions. [2020-10-28 19:22:41,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 31584 states and 48103 transitions. [2020-10-28 19:22:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-28 19:22:41,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:41,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:22:41,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:22:41,570 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:41,571 INFO L82 PathProgramCache]: Analyzing trace with hash -648290820, now seen corresponding path program 1 times [2020-10-28 19:22:41,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:41,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383271773] [2020-10-28 19:22:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:41,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:42,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:42,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:42,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:42,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:42,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:42,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:42,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:43,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:43,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:43,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:45,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:45,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:45,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:46,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:46,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-28 19:22:46,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 19:22:46,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 19:22:46,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:46,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:46,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:46,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:46,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-28 19:22:46,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:47,998 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:22:48,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:48,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:48,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:48,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:48,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:48,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:22:48,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:48,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:48,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:48,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:48,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:48,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:22:48,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383271773] [2020-10-28 19:22:48,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:48,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:48,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560197155] [2020-10-28 19:22:48,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:48,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:48,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:48,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:48,196 INFO L87 Difference]: Start difference. First operand 31584 states and 48103 transitions. Second operand 5 states. [2020-10-28 19:22:58,128 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:23:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:01,567 INFO L93 Difference]: Finished difference Result 93260 states and 141778 transitions. [2020-10-28 19:23:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:23:01,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-10-28 19:23:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:01,668 INFO L225 Difference]: With dead ends: 93260 [2020-10-28 19:23:01,669 INFO L226 Difference]: Without dead ends: 61797 [2020-10-28 19:23:01,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:23:01,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61797 states. [2020-10-28 19:23:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61797 to 61794. [2020-10-28 19:23:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61794 states. [2020-10-28 19:23:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61794 states to 61794 states and 93387 transitions. [2020-10-28 19:23:05,170 INFO L78 Accepts]: Start accepts. Automaton has 61794 states and 93387 transitions. Word has length 337 [2020-10-28 19:23:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:23:05,171 INFO L481 AbstractCegarLoop]: Abstraction has 61794 states and 93387 transitions. [2020-10-28 19:23:05,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:23:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 61794 states and 93387 transitions. [2020-10-28 19:23:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-28 19:23:05,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:05,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:05,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:23:05,264 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:05,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:05,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1585113928, now seen corresponding path program 1 times [2020-10-28 19:23:05,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:05,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769028928] [2020-10-28 19:23:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:05,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:06,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:06,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:06,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:06,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:06,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:06,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:08,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:08,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:08,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:10,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:10,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-28 19:23:10,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 19:23:10,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 19:23:10,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:10,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:10,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:23:10,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 19:23:10,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-28 19:23:10,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:11,686 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:23:11,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:11,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:11,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:11,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:11,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:11,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:23:11,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:11,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:11,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:11,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:11,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:11,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:11,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769028928] [2020-10-28 19:23:11,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:11,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:23:11,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983371114] [2020-10-28 19:23:11,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:23:11,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:23:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:23:11,874 INFO L87 Difference]: Start difference. First operand 61794 states and 93387 transitions. Second operand 4 states. [2020-10-28 19:23:25,281 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 19:23:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:29,742 INFO L93 Difference]: Finished difference Result 181880 states and 274275 transitions. [2020-10-28 19:23:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:23:29,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-10-28 19:23:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:29,933 INFO L225 Difference]: With dead ends: 181880 [2020-10-28 19:23:29,933 INFO L226 Difference]: Without dead ends: 120597 [2020-10-28 19:23:30,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120597 states. [2020-10-28 19:23:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120597 to 120594. [2020-10-28 19:23:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120594 states. [2020-10-28 19:23:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120594 states to 120594 states and 180863 transitions. [2020-10-28 19:23:36,709 INFO L78 Accepts]: Start accepts. Automaton has 120594 states and 180863 transitions. Word has length 339 [2020-10-28 19:23:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:23:36,709 INFO L481 AbstractCegarLoop]: Abstraction has 120594 states and 180863 transitions. [2020-10-28 19:23:36,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:23:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 120594 states and 180863 transitions. [2020-10-28 19:23:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-28 19:23:36,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:36,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:36,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:23:36,827 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1045768733, now seen corresponding path program 1 times [2020-10-28 19:23:36,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:36,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450279930] [2020-10-28 19:23:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:37,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:37,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:37,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:37,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:37,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:37,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:37,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:37,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:39,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:39,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:39,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:39,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:39,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:39,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:39,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:41,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:41,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:41,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:42,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:42,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-28 19:23:42,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 19:23:42,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 19:23:42,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:42,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:42,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:23:42,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:23:42,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-28 19:23:42,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:23:43,626 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:23:43,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:43,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:43,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:43,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:43,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:43,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:23:43,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:43,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:43,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:43,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:43,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:43,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:43,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450279930] [2020-10-28 19:23:43,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:43,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:23:43,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436830174] [2020-10-28 19:23:43,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:23:43,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:43,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:23:43,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:43,813 INFO L87 Difference]: Start difference. First operand 120594 states and 180863 transitions. Second operand 5 states. [2020-10-28 19:23:59,991 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:24:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:06,630 INFO L93 Difference]: Finished difference Result 355904 states and 532675 transitions. [2020-10-28 19:24:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:06,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-10-28 19:24:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:07,116 INFO L225 Difference]: With dead ends: 355904 [2020-10-28 19:24:07,116 INFO L226 Difference]: Without dead ends: 236045 [2020-10-28 19:24:07,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236045 states. [2020-10-28 19:24:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236045 to 236042. [2020-10-28 19:24:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236042 states. [2020-10-28 19:24:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236042 states to 236042 states and 351229 transitions. [2020-10-28 19:24:21,442 INFO L78 Accepts]: Start accepts. Automaton has 236042 states and 351229 transitions. Word has length 339 [2020-10-28 19:24:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:21,443 INFO L481 AbstractCegarLoop]: Abstraction has 236042 states and 351229 transitions. [2020-10-28 19:24:21,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:24:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 236042 states and 351229 transitions. [2020-10-28 19:24:21,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-28 19:24:21,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:21,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:21,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:24:21,612 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:21,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:21,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2022276956, now seen corresponding path program 1 times [2020-10-28 19:24:21,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:21,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019655850] [2020-10-28 19:24:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:26,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-28 19:24:26,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:24:26,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:24:26,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:26,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-28 19:24:26,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:28,053 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:24:28,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:28,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:28,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:28,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:28,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:28,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:24:28,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:28,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:28,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:28,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:28,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:28,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:28,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019655850] [2020-10-28 19:24:28,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:28,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:24:28,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34424624] [2020-10-28 19:24:28,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:24:28,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:28,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:24:28,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:28,243 INFO L87 Difference]: Start difference. First operand 236042 states and 351229 transitions. Second operand 5 states.