/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:38:00,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:38:00,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:38:00,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:38:00,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:38:00,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:38:00,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:38:00,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:38:00,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:38:00,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:38:00,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:38:00,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:38:00,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:38:00,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:38:00,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:38:00,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:38:00,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:38:00,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:38:00,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:38:00,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:38:00,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:38:00,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:38:00,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:38:00,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:38:00,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:38:00,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:38:00,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:38:00,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:38:00,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:38:00,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:38:00,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:38:00,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:38:00,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:38:00,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:38:00,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:38:00,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:38:00,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:38:00,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:38:00,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:38:00,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:38:00,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:38:00,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:38:00,739 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:38:00,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:38:00,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:38:00,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:38:00,741 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:38:00,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:38:00,742 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:38:00,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:38:00,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:38:00,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:38:00,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:38:00,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:38:00,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:38:00,743 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:38:00,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:38:00,743 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:38:00,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:38:00,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:38:00,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:38:00,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:38:00,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:38:00,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:38:00,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:38:00,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:38:00,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:38:00,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:38:00,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:38:00,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:38:00,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:38:00,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:38:01,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:38:01,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:38:01,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:38:01,217 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:38:01,218 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:38:01,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:38:01,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4edc3424a/3e638211754f46bd974e8efd9266815e/FLAG4187b3fc2 [2020-10-28 18:38:01,924 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:38:01,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:38:01,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4edc3424a/3e638211754f46bd974e8efd9266815e/FLAG4187b3fc2 [2020-10-28 18:38:02,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4edc3424a/3e638211754f46bd974e8efd9266815e [2020-10-28 18:38:02,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:38:02,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:38:02,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:38:02,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:38:02,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:38:02,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:38:02" (1/1) ... [2020-10-28 18:38:02,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@add5831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02, skipping insertion in model container [2020-10-28 18:38:02,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:38:02" (1/1) ... [2020-10-28 18:38:02,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:38:02,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:38:02,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:38:02,766 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:38:02,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:38:02,868 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:38:02,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02 WrapperNode [2020-10-28 18:38:02,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:38:02,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:38:02,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:38:02,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:38:02,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02" (1/1) ... [2020-10-28 18:38:02,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02" (1/1) ... [2020-10-28 18:38:02,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02" (1/1) ... [2020-10-28 18:38:02,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02" (1/1) ... [2020-10-28 18:38:02,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02" (1/1) ... [2020-10-28 18:38:02,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02" (1/1) ... [2020-10-28 18:38:02,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02" (1/1) ... [2020-10-28 18:38:02,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:38:02,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:38:02,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:38:02,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:38:02,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:38:03,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:38:03,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:38:03,027 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:38:03,027 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:38:03,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:38:03,027 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:38:03,027 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:38:03,027 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:38:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:38:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:38:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:38:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:38:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:38:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:38:03,029 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:38:03,029 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:38:03,029 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:38:03,029 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:38:03,029 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:38:03,029 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:38:03,030 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:38:03,030 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:38:03,030 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:38:03,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:38:03,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:38:03,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:38:03,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:38:03,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:38:03,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:38:03,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:38:03,759 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:38:03,759 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:38:03,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:38:03 BoogieIcfgContainer [2020-10-28 18:38:03,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:38:03,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:38:03,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:38:03,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:38:03,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:38:02" (1/3) ... [2020-10-28 18:38:03,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181f00f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:38:03, skipping insertion in model container [2020-10-28 18:38:03,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:38:02" (2/3) ... [2020-10-28 18:38:03,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181f00f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:38:03, skipping insertion in model container [2020-10-28 18:38:03,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:38:03" (3/3) ... [2020-10-28 18:38:03,770 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:38:03,782 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:38:03,787 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:38:03,800 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:38:03,827 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:38:03,828 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:38:03,828 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:38:03,828 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:38:03,828 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:38:03,828 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:38:03,828 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:38:03,828 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:38:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2020-10-28 18:38:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:38:03,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:03,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:03,859 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:03,865 INFO L82 PathProgramCache]: Analyzing trace with hash 453713683, now seen corresponding path program 1 times [2020-10-28 18:38:03,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:03,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567454226] [2020-10-28 18:38:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:04,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:04,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:05,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:09,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:09,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:38:09,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:38:09,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:38:09,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:09,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:38:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:38:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 18:38:09,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:38:09,477 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:38:09,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:09,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:09,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:09,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:09,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:09,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 18:38:09,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:09,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:09,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:09,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:09,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:09,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:38:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:09,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567454226] [2020-10-28 18:38:09,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:09,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:38:09,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805798345] [2020-10-28 18:38:09,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:38:09,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:09,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:38:09,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:38:09,584 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 4 states. [2020-10-28 18:38:09,870 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:38:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:10,549 INFO L93 Difference]: Finished difference Result 234 states and 371 transitions. [2020-10-28 18:38:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:38:10,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 18:38:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:10,563 INFO L225 Difference]: With dead ends: 234 [2020-10-28 18:38:10,563 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 18:38:10,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:38:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 18:38:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-10-28 18:38:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-28 18:38:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 220 transitions. [2020-10-28 18:38:10,631 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 220 transitions. Word has length 65 [2020-10-28 18:38:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:10,632 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 220 transitions. [2020-10-28 18:38:10,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:38:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 220 transitions. [2020-10-28 18:38:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:38:10,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:10,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:10,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:38:10,636 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:10,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:10,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2133940420, now seen corresponding path program 1 times [2020-10-28 18:38:10,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:10,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640818788] [2020-10-28 18:38:10,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:10,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:10,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:10,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:11,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:12,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:15,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:15,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:38:15,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:38:15,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:38:15,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:15,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:38:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 18:38:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:38:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 18:38:15,945 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:38:15,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:15,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:15,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:15,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:15,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:15,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:38:15,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:15,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:15,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:15,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:15,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:15,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:38:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:15,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640818788] [2020-10-28 18:38:15,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:15,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:38:15,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227700134] [2020-10-28 18:38:15,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:38:15,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:15,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:38:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:38:15,995 INFO L87 Difference]: Start difference. First operand 153 states and 220 transitions. Second operand 4 states. [2020-10-28 18:38:16,233 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:38:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:16,757 INFO L93 Difference]: Finished difference Result 367 states and 558 transitions. [2020-10-28 18:38:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:38:16,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 18:38:16,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:16,761 INFO L225 Difference]: With dead ends: 367 [2020-10-28 18:38:16,762 INFO L226 Difference]: Without dead ends: 252 [2020-10-28 18:38:16,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:38:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-28 18:38:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2020-10-28 18:38:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-28 18:38:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 372 transitions. [2020-10-28 18:38:16,795 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 372 transitions. Word has length 66 [2020-10-28 18:38:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:16,796 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 372 transitions. [2020-10-28 18:38:16,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:38:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 372 transitions. [2020-10-28 18:38:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:38:16,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:16,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:16,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:38:16,799 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash -679818976, now seen corresponding path program 1 times [2020-10-28 18:38:16,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:16,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738699067] [2020-10-28 18:38:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:16,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:16,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:16,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:17,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:20,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:20,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:38:20,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:38:20,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3521 [2020-10-28 18:38:20,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:20,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:20,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:38:20,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:38:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 18:38:20,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:38:20,588 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:38:20,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:20,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:20,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:20,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:20,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:20,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:38:20,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:20,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:20,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:20,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:20,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:20,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:20,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738699067] [2020-10-28 18:38:20,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:20,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:38:20,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649195270] [2020-10-28 18:38:20,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:38:20,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:20,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:38:20,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:38:20,637 INFO L87 Difference]: Start difference. First operand 249 states and 372 transitions. Second operand 4 states. [2020-10-28 18:38:20,858 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:38:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:21,377 INFO L93 Difference]: Finished difference Result 639 states and 988 transitions. [2020-10-28 18:38:21,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:38:21,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 18:38:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:21,381 INFO L225 Difference]: With dead ends: 639 [2020-10-28 18:38:21,382 INFO L226 Difference]: Without dead ends: 428 [2020-10-28 18:38:21,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:38:21,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-28 18:38:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 425. [2020-10-28 18:38:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-28 18:38:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 648 transitions. [2020-10-28 18:38:21,420 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 648 transitions. Word has length 67 [2020-10-28 18:38:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:21,421 INFO L481 AbstractCegarLoop]: Abstraction has 425 states and 648 transitions. [2020-10-28 18:38:21,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:38:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 648 transitions. [2020-10-28 18:38:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:38:21,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:21,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:21,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:38:21,424 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:21,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2086048496, now seen corresponding path program 1 times [2020-10-28 18:38:21,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:21,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146940864] [2020-10-28 18:38:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:21,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:21,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:21,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:21,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:22,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:26,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:26,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:38:26,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:38:26,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:38:26,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:26,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:26,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:38:26,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:38:26,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:38:26,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:38:26,720 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:38:26,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:26,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:26,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:26,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:26,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:26,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:38:26,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:26,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:26,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:26,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:26,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:26,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:38:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:26,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146940864] [2020-10-28 18:38:26,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:26,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:38:26,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26829297] [2020-10-28 18:38:26,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:38:26,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:26,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:38:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:38:26,772 INFO L87 Difference]: Start difference. First operand 425 states and 648 transitions. Second operand 4 states. [2020-10-28 18:38:27,056 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:38:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:27,716 INFO L93 Difference]: Finished difference Result 1135 states and 1764 transitions. [2020-10-28 18:38:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:38:27,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:38:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:27,721 INFO L225 Difference]: With dead ends: 1135 [2020-10-28 18:38:27,722 INFO L226 Difference]: Without dead ends: 748 [2020-10-28 18:38:27,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:38:27,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-28 18:38:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 745. [2020-10-28 18:38:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2020-10-28 18:38:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1144 transitions. [2020-10-28 18:38:27,775 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1144 transitions. Word has length 68 [2020-10-28 18:38:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:27,775 INFO L481 AbstractCegarLoop]: Abstraction has 745 states and 1144 transitions. [2020-10-28 18:38:27,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:38:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1144 transitions. [2020-10-28 18:38:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:38:27,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:27,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:27,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:38:27,777 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:27,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:27,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1563202530, now seen corresponding path program 1 times [2020-10-28 18:38:27,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:27,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933174336] [2020-10-28 18:38:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:27,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:27,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:27,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:28,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:28,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:29,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:31,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:32,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:32,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:38:32,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:38:32,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 18:38:32,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:32,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:38:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:38:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 18:38:32,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:33,123 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:38:33,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:33,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:33,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:33,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:33,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:33,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:38:33,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:33,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:33,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:38:33,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:33,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:38:33,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:38:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:33,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933174336] [2020-10-28 18:38:33,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:33,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:38:33,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794456350] [2020-10-28 18:38:33,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:38:33,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:33,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:38:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:38:33,187 INFO L87 Difference]: Start difference. First operand 745 states and 1144 transitions. Second operand 6 states. [2020-10-28 18:38:33,459 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:38:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:33,983 INFO L93 Difference]: Finished difference Result 1452 states and 2250 transitions. [2020-10-28 18:38:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:38:33,984 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 18:38:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:33,992 INFO L225 Difference]: With dead ends: 1452 [2020-10-28 18:38:33,992 INFO L226 Difference]: Without dead ends: 745 [2020-10-28 18:38:33,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:38:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2020-10-28 18:38:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 745. [2020-10-28 18:38:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2020-10-28 18:38:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1136 transitions. [2020-10-28 18:38:34,053 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1136 transitions. Word has length 69 [2020-10-28 18:38:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:34,054 INFO L481 AbstractCegarLoop]: Abstraction has 745 states and 1136 transitions. [2020-10-28 18:38:34,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:38:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1136 transitions. [2020-10-28 18:38:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:38:34,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:34,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:34,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:38:34,059 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:34,060 INFO L82 PathProgramCache]: Analyzing trace with hash -728000039, now seen corresponding path program 1 times [2020-10-28 18:38:34,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:34,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841949227] [2020-10-28 18:38:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:34,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:34,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:34,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:34,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:37,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:37,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:38:37,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:38:37,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3469 [2020-10-28 18:38:37,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:37,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:38:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:38:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:38:37,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:37,895 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:38:37,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:37,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:37,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:37,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:37,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:37,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:38:37,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:37,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:37,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:37,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:37,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:37,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841949227] [2020-10-28 18:38:37,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:37,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:38:37,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029340791] [2020-10-28 18:38:37,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:38:37,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:37,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:38:37,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:38:37,952 INFO L87 Difference]: Start difference. First operand 745 states and 1136 transitions. Second operand 8 states. [2020-10-28 18:38:38,297 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:38:38,978 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:38:39,541 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:38:39,832 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:38:40,101 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:38:40,363 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 18:38:40,690 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:38:40,970 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:38:41,249 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:38:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:41,602 INFO L93 Difference]: Finished difference Result 7815 states and 12116 transitions. [2020-10-28 18:38:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:38:41,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 18:38:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:41,642 INFO L225 Difference]: With dead ends: 7815 [2020-10-28 18:38:41,643 INFO L226 Difference]: Without dead ends: 7108 [2020-10-28 18:38:41,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-28 18:38:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7108 states. [2020-10-28 18:38:41,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7108 to 1449. [2020-10-28 18:38:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1449 states. [2020-10-28 18:38:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2200 transitions. [2020-10-28 18:38:41,876 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2200 transitions. Word has length 69 [2020-10-28 18:38:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:41,876 INFO L481 AbstractCegarLoop]: Abstraction has 1449 states and 2200 transitions. [2020-10-28 18:38:41,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:38:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2200 transitions. [2020-10-28 18:38:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:38:41,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:41,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:41,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:38:41,878 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1453249378, now seen corresponding path program 1 times [2020-10-28 18:38:41,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:41,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682509408] [2020-10-28 18:38:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:41,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:41,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:41,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:42,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:43,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:43,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:45,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:45,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:38:45,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:38:45,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3360 [2020-10-28 18:38:45,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:45,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:45,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:38:45,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:38:45,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 18:38:45,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:45,577 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:38:45,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:45,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:45,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:45,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:45,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:45,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:38:45,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:45,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:45,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:45,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:45,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:45,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:38:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:45,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682509408] [2020-10-28 18:38:45,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:45,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:38:45,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551863861] [2020-10-28 18:38:45,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:38:45,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:38:45,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:38:45,639 INFO L87 Difference]: Start difference. First operand 1449 states and 2200 transitions. Second operand 4 states. [2020-10-28 18:38:45,934 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:38:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:46,539 INFO L93 Difference]: Finished difference Result 4095 states and 6220 transitions. [2020-10-28 18:38:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:38:46,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 18:38:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:46,554 INFO L225 Difference]: With dead ends: 4095 [2020-10-28 18:38:46,554 INFO L226 Difference]: Without dead ends: 2684 [2020-10-28 18:38:46,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:38:46,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2020-10-28 18:38:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2649. [2020-10-28 18:38:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2649 states. [2020-10-28 18:38:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3944 transitions. [2020-10-28 18:38:46,809 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3944 transitions. Word has length 71 [2020-10-28 18:38:46,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:46,809 INFO L481 AbstractCegarLoop]: Abstraction has 2649 states and 3944 transitions. [2020-10-28 18:38:46,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:38:46,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3944 transitions. [2020-10-28 18:38:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:38:46,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:46,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:46,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:38:46,811 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash -831719745, now seen corresponding path program 1 times [2020-10-28 18:38:46,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:46,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367082147] [2020-10-28 18:38:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:46,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:46,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:47,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:47,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:49,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:49,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:38:49,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:38:49,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2826 [2020-10-28 18:38:49,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:49,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:49,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:38:49,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:38:49,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 18:38:49,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:50,138 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:38:50,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:50,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:50,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:50,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:50,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:50,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:38:50,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:50,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:50,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:50,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:50,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:50,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:50,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367082147] [2020-10-28 18:38:50,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:50,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:38:50,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132279590] [2020-10-28 18:38:50,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:38:50,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:50,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:38:50,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:38:50,211 INFO L87 Difference]: Start difference. First operand 2649 states and 3944 transitions. Second operand 8 states. [2020-10-28 18:38:50,599 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 18:38:51,291 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:38:52,070 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:38:52,395 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:38:52,681 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:38:52,953 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:38:53,335 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:38:53,616 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:38:53,899 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:38:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:54,633 INFO L93 Difference]: Finished difference Result 14519 states and 21740 transitions. [2020-10-28 18:38:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:38:54,634 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-28 18:38:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:54,694 INFO L225 Difference]: With dead ends: 14519 [2020-10-28 18:38:54,694 INFO L226 Difference]: Without dead ends: 11908 [2020-10-28 18:38:54,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-28 18:38:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11908 states. [2020-10-28 18:38:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11908 to 2649. [2020-10-28 18:38:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2649 states. [2020-10-28 18:38:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3912 transitions. [2020-10-28 18:38:55,118 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3912 transitions. Word has length 71 [2020-10-28 18:38:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:55,118 INFO L481 AbstractCegarLoop]: Abstraction has 2649 states and 3912 transitions. [2020-10-28 18:38:55,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:38:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3912 transitions. [2020-10-28 18:38:55,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:38:55,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:55,119 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] [2020-10-28 18:38:55,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:38:55,120 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:55,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:55,120 INFO L82 PathProgramCache]: Analyzing trace with hash 611970157, now seen corresponding path program 1 times [2020-10-28 18:38:55,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:55,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895046404] [2020-10-28 18:38:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:55,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:55,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:55,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:55,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:55,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:55,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:55,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:56,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:00,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:00,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:39:00,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:39:00,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:39:00,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:00,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:00,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:39:00,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:39:00,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 18:39:00,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:00,384 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:39:00,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:00,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:00,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:00,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:00,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:00,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:39:00,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:00,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:39:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:39:00,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:39:00,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895046404] [2020-10-28 18:39:00,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:39:00,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:39:00,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986639616] [2020-10-28 18:39:00,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:39:00,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:00,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:39:00,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:39:00,438 INFO L87 Difference]: Start difference. First operand 2649 states and 3912 transitions. Second operand 4 states. [2020-10-28 18:39:00,731 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:39:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:01,496 INFO L93 Difference]: Finished difference Result 5154 states and 7696 transitions. [2020-10-28 18:39:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:39:01,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:39:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:01,517 INFO L225 Difference]: With dead ends: 5154 [2020-10-28 18:39:01,517 INFO L226 Difference]: Without dead ends: 3742 [2020-10-28 18:39:01,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:39:01,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2020-10-28 18:39:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3739. [2020-10-28 18:39:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3739 states. [2020-10-28 18:39:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 5514 transitions. [2020-10-28 18:39:01,923 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 5514 transitions. Word has length 72 [2020-10-28 18:39:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:01,923 INFO L481 AbstractCegarLoop]: Abstraction has 3739 states and 5514 transitions. [2020-10-28 18:39:01,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:39:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 5514 transitions. [2020-10-28 18:39:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:39:01,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:01,924 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] [2020-10-28 18:39:01,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:39:01,924 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash -72877690, now seen corresponding path program 1 times [2020-10-28 18:39:01,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:01,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573616995] [2020-10-28 18:39:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:01,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:02,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:02,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:02,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:03,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:03,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:39:03,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:39:03,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1845 [2020-10-28 18:39:03,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:03,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:03,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:39:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:39:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:39:03,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:04,194 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:39:04,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:04,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:04,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:04,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:04,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:04,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:39:04,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:04,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:39:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:39:04,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:39:04,264 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 18:39:04,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573616995] [2020-10-28 18:39:04,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:39:04,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:39:04,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455154779] [2020-10-28 18:39:04,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:39:04,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:04,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:39:04,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:39:04,267 INFO L87 Difference]: Start difference. First operand 3739 states and 5514 transitions. Second operand 6 states. [2020-10-28 18:39:04,587 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:39:05,452 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:39:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:06,042 INFO L93 Difference]: Finished difference Result 11089 states and 16366 transitions. [2020-10-28 18:39:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:39:06,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-28 18:39:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:06,073 INFO L225 Difference]: With dead ends: 11089 [2020-10-28 18:39:06,074 INFO L226 Difference]: Without dead ends: 7390 [2020-10-28 18:39:06,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:39:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2020-10-28 18:39:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 7387. [2020-10-28 18:39:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7387 states. [2020-10-28 18:39:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7387 states to 7387 states and 10842 transitions. [2020-10-28 18:39:06,949 INFO L78 Accepts]: Start accepts. Automaton has 7387 states and 10842 transitions. Word has length 72 [2020-10-28 18:39:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:06,949 INFO L481 AbstractCegarLoop]: Abstraction has 7387 states and 10842 transitions. [2020-10-28 18:39:06,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:39:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 7387 states and 10842 transitions. [2020-10-28 18:39:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:39:06,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:06,950 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] [2020-10-28 18:39:06,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:39:06,950 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash -397200469, now seen corresponding path program 1 times [2020-10-28 18:39:06,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:06,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549989240] [2020-10-28 18:39:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:06,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:07,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:07,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:07,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:39:07,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:39:07,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-28 18:39:07,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:07,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:07,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:39:07,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:39:07,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:39:07,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:07,760 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:39:07,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:07,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:07,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:07,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:07,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:07,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:39:07,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:07,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:07,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:39:07,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:07,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:39:07,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:39:07,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549989240] [2020-10-28 18:39:07,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:39:07,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:39:07,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381534005] [2020-10-28 18:39:07,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:39:07,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:07,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:39:07,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:39:07,812 INFO L87 Difference]: Start difference. First operand 7387 states and 10842 transitions. Second operand 6 states. [2020-10-28 18:39:08,072 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:39:08,857 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:39:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:09,778 INFO L93 Difference]: Finished difference Result 21985 states and 32254 transitions. [2020-10-28 18:39:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:39:09,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-28 18:39:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:09,814 INFO L225 Difference]: With dead ends: 21985 [2020-10-28 18:39:09,814 INFO L226 Difference]: Without dead ends: 14638 [2020-10-28 18:39:09,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:39:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14638 states. [2020-10-28 18:39:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14638 to 14635. [2020-10-28 18:39:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14635 states. [2020-10-28 18:39:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14635 states to 14635 states and 21354 transitions. [2020-10-28 18:39:11,559 INFO L78 Accepts]: Start accepts. Automaton has 14635 states and 21354 transitions. Word has length 72 [2020-10-28 18:39:11,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:11,560 INFO L481 AbstractCegarLoop]: Abstraction has 14635 states and 21354 transitions. [2020-10-28 18:39:11,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:39:11,560 INFO L276 IsEmpty]: Start isEmpty. Operand 14635 states and 21354 transitions. [2020-10-28 18:39:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:39:11,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:11,561 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] [2020-10-28 18:39:11,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:39:11,561 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:11,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:11,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1723828390, now seen corresponding path program 1 times [2020-10-28 18:39:11,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:11,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229040210] [2020-10-28 18:39:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:11,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:11,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:11,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:39:11,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:11,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 18:39:11,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:11,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:11,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:39:11,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 18:39:11,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:39:11,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:12,060 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:39:12,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:12,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:12,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:12,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:12,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:12,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:39:12,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:12,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:12,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:39:12,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:12,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:39:12,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:39:12,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229040210] [2020-10-28 18:39:12,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:39:12,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:39:12,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199976494] [2020-10-28 18:39:12,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:39:12,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:12,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:39:12,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:39:12,100 INFO L87 Difference]: Start difference. First operand 14635 states and 21354 transitions. Second operand 5 states. [2020-10-28 18:39:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:14,801 INFO L93 Difference]: Finished difference Result 26334 states and 38279 transitions. [2020-10-28 18:39:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:39:14,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-28 18:39:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:14,859 INFO L225 Difference]: With dead ends: 26334 [2020-10-28 18:39:14,859 INFO L226 Difference]: Without dead ends: 26331 [2020-10-28 18:39:14,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:39:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26331 states. [2020-10-28 18:39:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26331 to 15147. [2020-10-28 18:39:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15147 states. [2020-10-28 18:39:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15147 states to 15147 states and 21802 transitions. [2020-10-28 18:39:16,614 INFO L78 Accepts]: Start accepts. Automaton has 15147 states and 21802 transitions. Word has length 72 [2020-10-28 18:39:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:16,614 INFO L481 AbstractCegarLoop]: Abstraction has 15147 states and 21802 transitions. [2020-10-28 18:39:16,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:39:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 15147 states and 21802 transitions. [2020-10-28 18:39:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 18:39:16,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:16,621 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:16,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:39:16,621 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:16,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2101427831, now seen corresponding path program 1 times [2020-10-28 18:39:16,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:16,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329664826] [2020-10-28 18:39:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:16,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:16,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:16,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:16,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:17,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:18,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:18,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:21,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:21,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 18:39:21,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:39:21,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:39:21,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:21,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:21,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:39:21,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:39:21,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 18:39:21,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:21,938 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:39:21,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:21,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:21,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:21,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:21,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:21,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:39:21,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:21,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:39:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:39:21,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:39:21,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329664826] [2020-10-28 18:39:21,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:39:21,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:39:21,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415728350] [2020-10-28 18:39:21,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:39:21,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:21,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:39:21,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:39:21,975 INFO L87 Difference]: Start difference. First operand 15147 states and 21802 transitions. Second operand 4 states. [2020-10-28 18:39:23,130 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:39:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:23,633 INFO L93 Difference]: Finished difference Result 25559 states and 36956 transitions. [2020-10-28 18:39:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:39:23,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 18:39:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:23,655 INFO L225 Difference]: With dead ends: 25559 [2020-10-28 18:39:23,656 INFO L226 Difference]: Without dead ends: 10452 [2020-10-28 18:39:23,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:39:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10452 states. [2020-10-28 18:39:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10452 to 10449. [2020-10-28 18:39:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10449 states. [2020-10-28 18:39:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10449 states to 10449 states and 15063 transitions. [2020-10-28 18:39:24,818 INFO L78 Accepts]: Start accepts. Automaton has 10449 states and 15063 transitions. Word has length 99 [2020-10-28 18:39:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:24,818 INFO L481 AbstractCegarLoop]: Abstraction has 10449 states and 15063 transitions. [2020-10-28 18:39:24,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:39:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 10449 states and 15063 transitions. [2020-10-28 18:39:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 18:39:24,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:24,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:24,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:39:24,823 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:24,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1479684248, now seen corresponding path program 1 times [2020-10-28 18:39:24,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:24,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366903249] [2020-10-28 18:39:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:24,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:24,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:24,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:25,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:26,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:26,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:26,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:26,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:28,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:28,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:28,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:29,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:29,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 18:39:29,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:39:29,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:39:29,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:29,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:29,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:39:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:39:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 18:39:29,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:30,186 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:39:30,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:30,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:30,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:30,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:30,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:30,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:39:30,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:30,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:39:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:39:30,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:39:30,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366903249] [2020-10-28 18:39:30,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:39:30,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:39:30,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838426180] [2020-10-28 18:39:30,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:39:30,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:39:30,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:39:30,236 INFO L87 Difference]: Start difference. First operand 10449 states and 15063 transitions. Second operand 6 states. [2020-10-28 18:39:30,567 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:39:31,522 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 18:39:31,893 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:39:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:33,521 INFO L93 Difference]: Finished difference Result 30426 states and 44125 transitions. [2020-10-28 18:39:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:39:33,524 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2020-10-28 18:39:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:33,555 INFO L225 Difference]: With dead ends: 30426 [2020-10-28 18:39:33,556 INFO L226 Difference]: Without dead ends: 20055 [2020-10-28 18:39:33,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:39:33,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20055 states. [2020-10-28 18:39:35,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20055 to 20049. [2020-10-28 18:39:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20049 states. [2020-10-28 18:39:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20049 states to 20049 states and 28887 transitions. [2020-10-28 18:39:35,863 INFO L78 Accepts]: Start accepts. Automaton has 20049 states and 28887 transitions. Word has length 100 [2020-10-28 18:39:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:35,864 INFO L481 AbstractCegarLoop]: Abstraction has 20049 states and 28887 transitions. [2020-10-28 18:39:35,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:39:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 20049 states and 28887 transitions. [2020-10-28 18:39:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 18:39:35,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:35,868 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:35,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:39:35,868 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:35,868 INFO L82 PathProgramCache]: Analyzing trace with hash 95997830, now seen corresponding path program 1 times [2020-10-28 18:39:35,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:35,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911240243] [2020-10-28 18:39:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:35,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:35,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:35,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:36,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:36,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:36,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:38,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:40,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:40,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 18:39:40,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:39:40,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:39:40,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:40,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:40,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:39:40,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:39:40,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 18:39:40,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:41,198 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:39:41,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:41,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:41,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:41,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:41,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:41,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:39:41,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:41,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:41,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:39:41,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:41,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:39:41,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 18:39:41,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911240243] [2020-10-28 18:39:41,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:39:41,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:39:41,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841584226] [2020-10-28 18:39:41,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:39:41,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:41,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:39:41,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:39:41,234 INFO L87 Difference]: Start difference. First operand 20049 states and 28887 transitions. Second operand 8 states. [2020-10-28 18:39:41,557 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:39:42,681 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:39:42,952 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:39:43,286 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 18:39:43,614 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:39:43,893 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:39:44,156 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:39:44,415 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:39:53,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:53,109 INFO L93 Difference]: Finished difference Result 117772 states and 169673 transitions. [2020-10-28 18:39:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:39:53,110 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2020-10-28 18:39:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:53,273 INFO L225 Difference]: With dead ends: 117772 [2020-10-28 18:39:53,273 INFO L226 Difference]: Without dead ends: 97801 [2020-10-28 18:39:53,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:39:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97801 states. [2020-10-28 18:39:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97801 to 35601. [2020-10-28 18:39:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35601 states. [2020-10-28 18:39:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35601 states to 35601 states and 51287 transitions. [2020-10-28 18:39:58,305 INFO L78 Accepts]: Start accepts. Automaton has 35601 states and 51287 transitions. Word has length 100 [2020-10-28 18:39:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:58,305 INFO L481 AbstractCegarLoop]: Abstraction has 35601 states and 51287 transitions. [2020-10-28 18:39:58,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:39:58,306 INFO L276 IsEmpty]: Start isEmpty. Operand 35601 states and 51287 transitions. [2020-10-28 18:39:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 18:39:58,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:58,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:58,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:39:58,311 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:58,312 INFO L82 PathProgramCache]: Analyzing trace with hash 832099712, now seen corresponding path program 1 times [2020-10-28 18:39:58,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:58,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059121114] [2020-10-28 18:39:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:58,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:58,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:58,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:58,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:59,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:59,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:01,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:03,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:03,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 18:40:03,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:40:03,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:40:03,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:03,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:03,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:40:03,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:40:03,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 18:40:03,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:40:03,655 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:40:03,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:40:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:03,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:03,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:03,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:40:03,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:40:03,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:40:03,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:03,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:03,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:40:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:40:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:40:03,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:40:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 18:40:03,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059121114] [2020-10-28 18:40:03,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:40:03,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:40:03,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295049420] [2020-10-28 18:40:03,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:40:03,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:40:03,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:40:03,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:40:03,702 INFO L87 Difference]: Start difference. First operand 35601 states and 51287 transitions. Second operand 8 states. [2020-10-28 18:40:04,030 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:40:05,170 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:40:05,440 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 18:40:05,788 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:40:06,085 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:40:06,361 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:40:06,639 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:40:06,936 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:40:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:40:18,518 INFO L93 Difference]: Finished difference Result 138700 states and 199561 transitions. [2020-10-28 18:40:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:40:18,519 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2020-10-28 18:40:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:40:18,695 INFO L225 Difference]: With dead ends: 138700 [2020-10-28 18:40:18,695 INFO L226 Difference]: Without dead ends: 118729 [2020-10-28 18:40:18,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:40:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118729 states. [2020-10-28 18:40:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118729 to 56337. [2020-10-28 18:40:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56337 states. [2020-10-28 18:40:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56337 states to 56337 states and 80983 transitions. [2020-10-28 18:40:26,084 INFO L78 Accepts]: Start accepts. Automaton has 56337 states and 80983 transitions. Word has length 100 [2020-10-28 18:40:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:40:26,084 INFO L481 AbstractCegarLoop]: Abstraction has 56337 states and 80983 transitions. [2020-10-28 18:40:26,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:40:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 56337 states and 80983 transitions. [2020-10-28 18:40:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 18:40:26,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:40:26,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:40:26,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:40:26,091 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:40:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:40:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1432597004, now seen corresponding path program 1 times [2020-10-28 18:40:26,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:40:26,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592175450] [2020-10-28 18:40:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:40:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:26,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:26,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:26,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:26,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:26,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:26,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:28,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:31,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:31,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 18:40:31,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:40:31,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:40:31,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:31,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:31,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:40:31,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:40:31,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 18:40:31,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:40:31,436 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:40:31,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:40:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:31,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:31,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:31,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:40:31,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:40:31,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:40:31,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:31,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:31,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:40:31,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:40:31,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:40:31,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:40:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:40:31,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592175450] [2020-10-28 18:40:31,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:40:31,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:40:31,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897253731] [2020-10-28 18:40:31,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:40:31,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:40:31,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:40:31,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:40:31,469 INFO L87 Difference]: Start difference. First operand 56337 states and 80983 transitions. Second operand 8 states. [2020-10-28 18:40:31,794 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:40:33,007 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 18:40:33,371 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:40:33,642 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:40:33,895 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:40:34,259 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:40:34,544 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:40:34,836 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:40:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:40:48,712 INFO L93 Difference]: Finished difference Result 155212 states and 223273 transitions. [2020-10-28 18:40:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:40:48,713 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2020-10-28 18:40:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:40:48,889 INFO L225 Difference]: With dead ends: 155212 [2020-10-28 18:40:48,889 INFO L226 Difference]: Without dead ends: 135241 [2020-10-28 18:40:48,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:40:49,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135241 states. [2020-10-28 18:40:58,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135241 to 71889. [2020-10-28 18:40:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71889 states. [2020-10-28 18:40:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71889 states to 71889 states and 103383 transitions. [2020-10-28 18:40:58,278 INFO L78 Accepts]: Start accepts. Automaton has 71889 states and 103383 transitions. Word has length 100 [2020-10-28 18:40:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:40:58,279 INFO L481 AbstractCegarLoop]: Abstraction has 71889 states and 103383 transitions. [2020-10-28 18:40:58,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:40:58,279 INFO L276 IsEmpty]: Start isEmpty. Operand 71889 states and 103383 transitions. [2020-10-28 18:40:58,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 18:40:58,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:40:58,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:40:58,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:40:58,285 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:40:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:40:58,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2015920878, now seen corresponding path program 1 times [2020-10-28 18:40:58,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:40:58,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385363054] [2020-10-28 18:40:58,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:40:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:58,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:58,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:58,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:58,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:58,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:02,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:02,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:02,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:02,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:03,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:03,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 18:41:03,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:41:03,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:41:03,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:03,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:41:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:41:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 18:41:03,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:03,620 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:41:03,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:03,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:03,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:03,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:03,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:03,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:41:03,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:03,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:03,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:41:03,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:03,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:41:03,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 18:41:03,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385363054] [2020-10-28 18:41:03,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:41:03,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:41:03,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583144123] [2020-10-28 18:41:03,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:41:03,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:03,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:41:03,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:41:03,654 INFO L87 Difference]: Start difference. First operand 71889 states and 103383 transitions. Second operand 8 states. [2020-10-28 18:41:03,988 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:41:05,608 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:41:05,902 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:41:06,177 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:41:06,464 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:41:06,727 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 18:41:06,992 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:41:07,263 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:41:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:23,926 INFO L93 Difference]: Finished difference Result 172092 states and 247513 transitions. [2020-10-28 18:41:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:41:23,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2020-10-28 18:41:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:24,306 INFO L225 Difference]: With dead ends: 172092 [2020-10-28 18:41:24,306 INFO L226 Difference]: Without dead ends: 152121 [2020-10-28 18:41:24,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:41:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152121 states.