/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:12:23,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:12:23,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:12:23,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:12:23,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:12:23,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:12:23,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:12:24,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:12:24,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:12:24,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:12:24,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:12:24,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:12:24,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:12:24,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:12:24,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:12:24,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:12:24,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:12:24,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:12:24,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:12:24,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:12:24,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:12:24,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:12:24,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:12:24,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:12:24,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:12:24,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:12:24,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:12:24,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:12:24,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:12:24,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:12:24,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:12:24,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:12:24,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:12:24,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:12:24,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:12:24,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:12:24,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:12:24,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:12:24,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:12:24,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:12:24,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:12:24,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:12:24,122 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:12:24,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:12:24,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:12:24,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:12:24,124 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:12:24,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:12:24,125 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:12:24,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:12:24,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:12:24,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:12:24,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:12:24,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:12:24,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:12:24,126 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:12:24,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:12:24,127 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:12:24,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:12:24,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:12:24,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:12:24,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:12:24,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:12:24,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:12:24,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:12:24,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:12:24,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:12:24,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:12:24,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:12:24,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:12:24,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:12:24,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:12:24,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:12:24,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:12:24,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:12:24,564 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:12:24,565 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:12:24,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:12:24,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/566ede24c/baa46495d5ba4c668307882a8dc4a572/FLAG658f6eca6 [2020-10-29 13:12:25,514 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:12:25,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:12:25,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/566ede24c/baa46495d5ba4c668307882a8dc4a572/FLAG658f6eca6 [2020-10-29 13:12:25,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/566ede24c/baa46495d5ba4c668307882a8dc4a572 [2020-10-29 13:12:25,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:12:25,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:12:25,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:12:25,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:12:25,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:12:25,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:12:25" (1/1) ... [2020-10-29 13:12:25,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14ff4dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:25, skipping insertion in model container [2020-10-29 13:12:25,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:12:25" (1/1) ... [2020-10-29 13:12:25,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:12:25,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:12:26,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:12:26,308 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:12:26,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:12:26,588 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:12:26,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:26 WrapperNode [2020-10-29 13:12:26,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:12:26,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:12:26,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:12:26,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:12:26,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:26" (1/1) ... [2020-10-29 13:12:26,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:26" (1/1) ... [2020-10-29 13:12:26,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:26" (1/1) ... [2020-10-29 13:12:26,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:26" (1/1) ... [2020-10-29 13:12:26,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:26" (1/1) ... [2020-10-29 13:12:26,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:26" (1/1) ... [2020-10-29 13:12:26,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:26" (1/1) ... [2020-10-29 13:12:26,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:12:26,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:12:26,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:12:26,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:12:26,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:12:26,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:12:26,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:12:26,780 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:12:26,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:12:26,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:12:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:12:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:12:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:12:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:12:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:12:26,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:12:26,783 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:12:26,783 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:12:26,783 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:12:26,783 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:12:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:12:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:12:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:12:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:12:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:12:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:12:26,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:12:26,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:12:26,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:12:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:12:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:12:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:12:28,469 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:12:28,469 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:12:28,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:12:28 BoogieIcfgContainer [2020-10-29 13:12:28,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:12:28,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:12:28,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:12:28,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:12:28,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:12:25" (1/3) ... [2020-10-29 13:12:28,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aed2722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:12:28, skipping insertion in model container [2020-10-29 13:12:28,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:26" (2/3) ... [2020-10-29 13:12:28,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aed2722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:12:28, skipping insertion in model container [2020-10-29 13:12:28,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:12:28" (3/3) ... [2020-10-29 13:12:28,481 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:12:28,494 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:12:28,500 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:12:28,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:12:28,551 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:12:28,552 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:12:28,552 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:12:28,552 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:12:28,552 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:12:28,552 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:12:28,552 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:12:28,552 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:12:28,577 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states. [2020-10-29 13:12:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:12:28,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:28,592 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] [2020-10-29 13:12:28,592 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash -439108496, now seen corresponding path program 1 times [2020-10-29 13:12:28,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:28,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897655180] [2020-10-29 13:12:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:29,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:29,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:29,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:29,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:30,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:31,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:31,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:31,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:32,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:33,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:12:33,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:12:33,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:12:33,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:33,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:33,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:12:33,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:12:33,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:12:33,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:12:34,628 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:12:34,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:34,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:34,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:34,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:34,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:34,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:12:34,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:34,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:34,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:34,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:34,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897655180] [2020-10-29 13:12:34,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:34,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:12:34,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585509495] [2020-10-29 13:12:34,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:12:34,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:34,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:12:34,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:12:34,720 INFO L87 Difference]: Start difference. First operand 288 states. Second operand 8 states. [2020-10-29 13:12:35,267 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-29 13:12:37,582 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-29 13:12:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:38,268 INFO L93 Difference]: Finished difference Result 559 states and 922 transitions. [2020-10-29 13:12:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:12:38,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-29 13:12:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:38,290 INFO L225 Difference]: With dead ends: 559 [2020-10-29 13:12:38,290 INFO L226 Difference]: Without dead ends: 460 [2020-10-29 13:12:38,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:12:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-29 13:12:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 273. [2020-10-29 13:12:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-29 13:12:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 339 transitions. [2020-10-29 13:12:38,382 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 339 transitions. Word has length 53 [2020-10-29 13:12:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:38,382 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 339 transitions. [2020-10-29 13:12:38,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:12:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 339 transitions. [2020-10-29 13:12:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:12:38,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:38,387 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] [2020-10-29 13:12:38,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:12:38,387 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:38,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1473566256, now seen corresponding path program 1 times [2020-10-29 13:12:38,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:38,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207632821] [2020-10-29 13:12:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:38,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:39,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:40,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:41,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:41,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:43,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:43,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:12:43,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:12:43,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:12:43,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:43,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:12:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:12:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:12:43,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:44,002 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:12:44,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:44,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:44,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:44,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:44,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:44,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:12:44,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:44,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:44,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:44,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:44,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:44,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:44,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207632821] [2020-10-29 13:12:44,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:44,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:12:44,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803725799] [2020-10-29 13:12:44,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:12:44,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:44,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:12:44,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:12:44,080 INFO L87 Difference]: Start difference. First operand 273 states and 339 transitions. Second operand 9 states. [2020-10-29 13:12:45,060 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 230 [2020-10-29 13:12:47,101 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-29 13:12:47,597 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-29 13:12:48,398 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-29 13:12:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:49,282 INFO L93 Difference]: Finished difference Result 729 states and 974 transitions. [2020-10-29 13:12:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 13:12:49,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-29 13:12:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:49,294 INFO L225 Difference]: With dead ends: 729 [2020-10-29 13:12:49,295 INFO L226 Difference]: Without dead ends: 680 [2020-10-29 13:12:49,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:12:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2020-10-29 13:12:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 411. [2020-10-29 13:12:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-29 13:12:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 537 transitions. [2020-10-29 13:12:49,348 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 537 transitions. Word has length 53 [2020-10-29 13:12:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:49,348 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 537 transitions. [2020-10-29 13:12:49,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:12:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 537 transitions. [2020-10-29 13:12:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:12:49,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:49,352 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] [2020-10-29 13:12:49,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:12:49,353 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:49,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:49,354 INFO L82 PathProgramCache]: Analyzing trace with hash -125995283, now seen corresponding path program 1 times [2020-10-29 13:12:49,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:49,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812777057] [2020-10-29 13:12:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:49,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:49,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:49,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:49,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:50,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:50,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:50,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:51,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:51,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:54,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:54,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:12:54,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:12:54,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:12:54,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:54,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:54,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:54,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:12:54,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:12:54,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:54,861 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:12:54,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:54,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:54,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:54,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:54,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:54,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:12:54,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:54,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:54,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:54,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:54,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:54,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812777057] [2020-10-29 13:12:54,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:54,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:54,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651400857] [2020-10-29 13:12:54,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:54,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:54,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:54,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:54,911 INFO L87 Difference]: Start difference. First operand 411 states and 537 transitions. Second operand 6 states. [2020-10-29 13:12:55,307 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:12:56,878 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-29 13:12:57,332 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:12:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:58,157 INFO L93 Difference]: Finished difference Result 1323 states and 1882 transitions. [2020-10-29 13:12:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:12:58,158 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-29 13:12:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:58,165 INFO L225 Difference]: With dead ends: 1323 [2020-10-29 13:12:58,165 INFO L226 Difference]: Without dead ends: 1187 [2020-10-29 13:12:58,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:12:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2020-10-29 13:12:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 903. [2020-10-29 13:12:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 903 states. [2020-10-29 13:12:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1252 transitions. [2020-10-29 13:12:58,242 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1252 transitions. Word has length 53 [2020-10-29 13:12:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:58,242 INFO L481 AbstractCegarLoop]: Abstraction has 903 states and 1252 transitions. [2020-10-29 13:12:58,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1252 transitions. [2020-10-29 13:12:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:12:58,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:58,246 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] [2020-10-29 13:12:58,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:12:58,246 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:58,247 INFO L82 PathProgramCache]: Analyzing trace with hash -199361388, now seen corresponding path program 1 times [2020-10-29 13:12:58,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:58,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408775579] [2020-10-29 13:12:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:58,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:58,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:58,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:58,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:58,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:59,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:59,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:59,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:59,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:00,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:01,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:01,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:02,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:03,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:13:03,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:13:03,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-29 13:13:03,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:03,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:03,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:13:03,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:13:03,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:03,817 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:13:03,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:03,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:03,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:03,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:03,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:13:03,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:03,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:03,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:03,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:03,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:03,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:03,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408775579] [2020-10-29 13:13:03,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:03,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:13:03,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873669281] [2020-10-29 13:13:03,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:13:03,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:03,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:13:03,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:03,874 INFO L87 Difference]: Start difference. First operand 903 states and 1252 transitions. Second operand 9 states. [2020-10-29 13:13:04,735 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 224 [2020-10-29 13:13:06,638 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 13:13:07,150 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:13:07,693 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-29 13:13:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:08,332 INFO L93 Difference]: Finished difference Result 1194 states and 1636 transitions. [2020-10-29 13:13:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:13:08,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-29 13:13:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:08,342 INFO L225 Difference]: With dead ends: 1194 [2020-10-29 13:13:08,342 INFO L226 Difference]: Without dead ends: 1189 [2020-10-29 13:13:08,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:13:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2020-10-29 13:13:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 907. [2020-10-29 13:13:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 907 states. [2020-10-29 13:13:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1258 transitions. [2020-10-29 13:13:08,421 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1258 transitions. Word has length 53 [2020-10-29 13:13:08,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:08,422 INFO L481 AbstractCegarLoop]: Abstraction has 907 states and 1258 transitions. [2020-10-29 13:13:08,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:13:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1258 transitions. [2020-10-29 13:13:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:13:08,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:08,425 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] [2020-10-29 13:13:08,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:13:08,425 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:08,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:08,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1898743687, now seen corresponding path program 1 times [2020-10-29 13:13:08,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:08,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081574949] [2020-10-29 13:13:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:08,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:09,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:09,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:09,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:09,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:13,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:13:13,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:13:13,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:13:13,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:13,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:13:13,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:13,992 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:13:13,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:14,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:14,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:14,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:14,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:14,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:13:14,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:14,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:14,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081574949] [2020-10-29 13:13:14,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:14,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:13:14,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773345615] [2020-10-29 13:13:14,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:14,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:14,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:14,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:14,066 INFO L87 Difference]: Start difference. First operand 907 states and 1258 transitions. Second operand 6 states. [2020-10-29 13:13:14,491 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-29 13:13:15,793 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-29 13:13:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:16,098 INFO L93 Difference]: Finished difference Result 1670 states and 2386 transitions. [2020-10-29 13:13:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:13:16,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-29 13:13:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:16,105 INFO L225 Difference]: With dead ends: 1670 [2020-10-29 13:13:16,105 INFO L226 Difference]: Without dead ends: 1044 [2020-10-29 13:13:16,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2020-10-29 13:13:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1019. [2020-10-29 13:13:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2020-10-29 13:13:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1433 transitions. [2020-10-29 13:13:16,200 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1433 transitions. Word has length 53 [2020-10-29 13:13:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:16,200 INFO L481 AbstractCegarLoop]: Abstraction has 1019 states and 1433 transitions. [2020-10-29 13:13:16,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1433 transitions. [2020-10-29 13:13:16,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:13:16,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:16,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:16,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:13:16,203 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash -381441494, now seen corresponding path program 1 times [2020-10-29 13:13:16,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:16,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60221753] [2020-10-29 13:13:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:16,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:18,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:18,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:18,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:18,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:18,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:18,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:20,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:20,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:20,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:21,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:21,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:21,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:13:21,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:13:21,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:13:21,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:21,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:21,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:21,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:13:21,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:13:21,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:21,762 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:13:21,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:21,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:21,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:21,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:21,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:21,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:13:21,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:21,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:21,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:21,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:21,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:21,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:21,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60221753] [2020-10-29 13:13:21,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:21,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:21,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398762225] [2020-10-29 13:13:21,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:21,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:21,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:21,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:21,819 INFO L87 Difference]: Start difference. First operand 1019 states and 1433 transitions. Second operand 6 states. [2020-10-29 13:13:22,220 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:13:23,576 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-29 13:13:24,025 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:13:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:24,473 INFO L93 Difference]: Finished difference Result 2553 states and 3761 transitions. [2020-10-29 13:13:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:13:24,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-29 13:13:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:24,487 INFO L225 Difference]: With dead ends: 2553 [2020-10-29 13:13:24,487 INFO L226 Difference]: Without dead ends: 2059 [2020-10-29 13:13:24,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:13:24,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2020-10-29 13:13:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1844. [2020-10-29 13:13:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1844 states. [2020-10-29 13:13:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2695 transitions. [2020-10-29 13:13:24,622 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2695 transitions. Word has length 53 [2020-10-29 13:13:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:24,622 INFO L481 AbstractCegarLoop]: Abstraction has 1844 states and 2695 transitions. [2020-10-29 13:13:24,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2695 transitions. [2020-10-29 13:13:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:13:24,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:24,624 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] [2020-10-29 13:13:24,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:13:24,624 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:24,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1870976687, now seen corresponding path program 1 times [2020-10-29 13:13:24,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:24,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718489821] [2020-10-29 13:13:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:24,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:24,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:24,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:24,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:26,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:26,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:26,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:27,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:27,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:28,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:29,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:29,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:13:29,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:13:29,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:13:29,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:29,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:13:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:13:29,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:30,111 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:13:30,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:30,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:30,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:30,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:30,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:30,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:13:30,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:30,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:30,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:30,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718489821] [2020-10-29 13:13:30,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:30,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:13:30,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646421706] [2020-10-29 13:13:30,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:13:30,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:30,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:13:30,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:13:30,168 INFO L87 Difference]: Start difference. First operand 1844 states and 2695 transitions. Second operand 7 states. [2020-10-29 13:13:30,579 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-29 13:13:31,994 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:13:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:32,760 INFO L93 Difference]: Finished difference Result 3884 states and 5811 transitions. [2020-10-29 13:13:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:13:32,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-29 13:13:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:32,778 INFO L225 Difference]: With dead ends: 3884 [2020-10-29 13:13:32,779 INFO L226 Difference]: Without dead ends: 3134 [2020-10-29 13:13:32,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:13:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2020-10-29 13:13:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 1819. [2020-10-29 13:13:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1819 states. [2020-10-29 13:13:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2666 transitions. [2020-10-29 13:13:32,943 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2666 transitions. Word has length 55 [2020-10-29 13:13:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:32,943 INFO L481 AbstractCegarLoop]: Abstraction has 1819 states and 2666 transitions. [2020-10-29 13:13:32,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:13:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2666 transitions. [2020-10-29 13:13:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:13:32,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:32,945 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] [2020-10-29 13:13:32,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:13:32,945 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:32,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1224223678, now seen corresponding path program 1 times [2020-10-29 13:13:32,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:32,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032802719] [2020-10-29 13:13:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:32,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:34,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:34,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:34,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:35,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:35,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:37,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:37,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:37,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:13:37,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:13:37,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:13:37,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:37,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:37,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:13:37,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:37,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:13:37,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:38,508 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:13:38,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:38,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:38,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:38,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:38,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:38,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:13:38,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:38,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:38,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:38,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:38,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032802719] [2020-10-29 13:13:38,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:38,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:13:38,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990622173] [2020-10-29 13:13:38,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:13:38,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:13:38,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:38,566 INFO L87 Difference]: Start difference. First operand 1819 states and 2666 transitions. Second operand 9 states. [2020-10-29 13:13:39,056 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:13:40,776 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-29 13:13:41,307 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:13:41,810 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:13:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:42,957 INFO L93 Difference]: Finished difference Result 7334 states and 11122 transitions. [2020-10-29 13:13:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 13:13:42,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-29 13:13:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:42,990 INFO L225 Difference]: With dead ends: 7334 [2020-10-29 13:13:42,990 INFO L226 Difference]: Without dead ends: 5869 [2020-10-29 13:13:42,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:13:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5869 states. [2020-10-29 13:13:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5869 to 2117. [2020-10-29 13:13:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2117 states. [2020-10-29 13:13:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3126 transitions. [2020-10-29 13:13:43,252 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3126 transitions. Word has length 55 [2020-10-29 13:13:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:43,252 INFO L481 AbstractCegarLoop]: Abstraction has 2117 states and 3126 transitions. [2020-10-29 13:13:43,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:13:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3126 transitions. [2020-10-29 13:13:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:13:43,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:43,254 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] [2020-10-29 13:13:43,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:13:43,254 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:43,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1890648806, now seen corresponding path program 1 times [2020-10-29 13:13:43,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:43,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755768578] [2020-10-29 13:13:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:43,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:45,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:48,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:13:48,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:13:48,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:13:48,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:48,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:13:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:13:48,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:48,750 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:13:48,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:48,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:48,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:48,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:48,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:13:48,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:48,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:48,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:48,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755768578] [2020-10-29 13:13:48,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:48,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:13:48,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357026372] [2020-10-29 13:13:48,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:13:48,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:48,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:13:48,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:13:48,793 INFO L87 Difference]: Start difference. First operand 2117 states and 3126 transitions. Second operand 8 states. [2020-10-29 13:13:49,247 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-29 13:13:50,541 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-29 13:13:51,058 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 13:13:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:51,741 INFO L93 Difference]: Finished difference Result 4952 states and 7486 transitions. [2020-10-29 13:13:51,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:13:51,741 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-29 13:13:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:51,760 INFO L225 Difference]: With dead ends: 4952 [2020-10-29 13:13:51,761 INFO L226 Difference]: Without dead ends: 3464 [2020-10-29 13:13:51,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:13:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2020-10-29 13:13:51,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2040. [2020-10-29 13:13:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-10-29 13:13:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 3012 transitions. [2020-10-29 13:13:52,003 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 3012 transitions. Word has length 55 [2020-10-29 13:13:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:52,004 INFO L481 AbstractCegarLoop]: Abstraction has 2040 states and 3012 transitions. [2020-10-29 13:13:52,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:13:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 3012 transitions. [2020-10-29 13:13:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:13:52,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:52,005 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] [2020-10-29 13:13:52,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:13:52,005 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash -404927639, now seen corresponding path program 1 times [2020-10-29 13:13:52,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:52,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856530189] [2020-10-29 13:13:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:54,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:57,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:57,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:13:57,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:13:57,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:13:57,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:57,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:57,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:57,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:13:57,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:13:57,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:57,437 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:13:57,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:57,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:57,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:57,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:57,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:57,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:13:57,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:57,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:57,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:57,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:57,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:57,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:57,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856530189] [2020-10-29 13:13:57,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:57,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:57,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501737382] [2020-10-29 13:13:57,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:57,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:57,471 INFO L87 Difference]: Start difference. First operand 2040 states and 3012 transitions. Second operand 6 states. [2020-10-29 13:13:57,879 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:13:59,054 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-29 13:13:59,502 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:14:00,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:00,437 INFO L93 Difference]: Finished difference Result 2731 states and 4043 transitions. [2020-10-29 13:14:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:14:00,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-29 13:14:00,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:00,451 INFO L225 Difference]: With dead ends: 2731 [2020-10-29 13:14:00,451 INFO L226 Difference]: Without dead ends: 2721 [2020-10-29 13:14:00,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:14:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2020-10-29 13:14:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2038. [2020-10-29 13:14:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2038 states. [2020-10-29 13:14:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 3008 transitions. [2020-10-29 13:14:00,656 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 3008 transitions. Word has length 55 [2020-10-29 13:14:00,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:00,656 INFO L481 AbstractCegarLoop]: Abstraction has 2038 states and 3008 transitions. [2020-10-29 13:14:00,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:00,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 3008 transitions. [2020-10-29 13:14:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:14:00,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:00,658 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] [2020-10-29 13:14:00,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:14:00,659 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:00,659 INFO L82 PathProgramCache]: Analyzing trace with hash 135430019, now seen corresponding path program 1 times [2020-10-29 13:14:00,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:00,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491509039] [2020-10-29 13:14:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:00,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:05,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:05,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:14:05,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:14:05,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:14:05,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:05,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:05,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:14:05,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:05,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:14:05,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:06,130 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:14:06,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:06,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:06,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:06,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:06,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:14:06,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:06,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:06,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:06,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:06,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:06,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:06,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491509039] [2020-10-29 13:14:06,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:06,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:14:06,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836538330] [2020-10-29 13:14:06,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:14:06,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:06,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:14:06,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:14:06,164 INFO L87 Difference]: Start difference. First operand 2038 states and 3008 transitions. Second operand 8 states. [2020-10-29 13:14:06,602 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-29 13:14:08,010 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:14:08,968 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 13:14:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:09,089 INFO L93 Difference]: Finished difference Result 2903 states and 4294 transitions. [2020-10-29 13:14:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:14:09,090 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-29 13:14:09,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:09,099 INFO L225 Difference]: With dead ends: 2903 [2020-10-29 13:14:09,099 INFO L226 Difference]: Without dead ends: 2108 [2020-10-29 13:14:09,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:14:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2020-10-29 13:14:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1892. [2020-10-29 13:14:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1892 states. [2020-10-29 13:14:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2773 transitions. [2020-10-29 13:14:09,283 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2773 transitions. Word has length 55 [2020-10-29 13:14:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:09,284 INFO L481 AbstractCegarLoop]: Abstraction has 1892 states and 2773 transitions. [2020-10-29 13:14:09,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:14:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2773 transitions. [2020-10-29 13:14:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:14:09,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:09,285 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] [2020-10-29 13:14:09,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:14:09,286 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:09,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1178876852, now seen corresponding path program 1 times [2020-10-29 13:14:09,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:09,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458168132] [2020-10-29 13:14:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:09,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:09,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:10,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:14:10,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:14:10,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-29 13:14:10,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:10,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:10,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:14:10,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:10,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:14:10,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:10,596 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:14:10,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:10,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:10,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:10,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:10,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:14:10,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:10,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:10,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:10,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458168132] [2020-10-29 13:14:10,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:10,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:14:10,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468880410] [2020-10-29 13:14:10,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:14:10,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:10,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:14:10,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:10,639 INFO L87 Difference]: Start difference. First operand 1892 states and 2773 transitions. Second operand 9 states. [2020-10-29 13:14:11,069 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:14:12,396 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-29 13:14:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:13,093 INFO L93 Difference]: Finished difference Result 3174 states and 4717 transitions. [2020-10-29 13:14:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:13,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-29 13:14:13,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:13,113 INFO L225 Difference]: With dead ends: 3174 [2020-10-29 13:14:13,113 INFO L226 Difference]: Without dead ends: 3167 [2020-10-29 13:14:13,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:14:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2020-10-29 13:14:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 1887. [2020-10-29 13:14:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1887 states. [2020-10-29 13:14:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2763 transitions. [2020-10-29 13:14:13,324 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2763 transitions. Word has length 57 [2020-10-29 13:14:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:13,325 INFO L481 AbstractCegarLoop]: Abstraction has 1887 states and 2763 transitions. [2020-10-29 13:14:13,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:14:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2763 transitions. [2020-10-29 13:14:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:14:13,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:13,326 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] [2020-10-29 13:14:13,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:14:13,326 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:13,327 INFO L82 PathProgramCache]: Analyzing trace with hash -598517054, now seen corresponding path program 1 times [2020-10-29 13:14:13,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:13,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781894233] [2020-10-29 13:14:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:13,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:14,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:14,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:14,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:14,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:15,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:15,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:15,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:16,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:18,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:14:18,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:14:18,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:14:18,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:18,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:18,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:14:18,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:18,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:14:18,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:18,791 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:14:18,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:18,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:18,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:18,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:18,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:14:18,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:18,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:18,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:18,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:18,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:18,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:18,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781894233] [2020-10-29 13:14:18,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:18,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:14:18,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513180270] [2020-10-29 13:14:18,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:14:18,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:14:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:14:18,824 INFO L87 Difference]: Start difference. First operand 1887 states and 2763 transitions. Second operand 7 states. [2020-10-29 13:14:19,264 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-29 13:14:20,500 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:14:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:21,307 INFO L93 Difference]: Finished difference Result 2997 states and 4460 transitions. [2020-10-29 13:14:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:14:21,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-29 13:14:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:21,313 INFO L225 Difference]: With dead ends: 2997 [2020-10-29 13:14:21,313 INFO L226 Difference]: Without dead ends: 2138 [2020-10-29 13:14:21,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:14:21,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2020-10-29 13:14:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1521. [2020-10-29 13:14:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1521 states. [2020-10-29 13:14:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2219 transitions. [2020-10-29 13:14:21,484 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2219 transitions. Word has length 57 [2020-10-29 13:14:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:21,485 INFO L481 AbstractCegarLoop]: Abstraction has 1521 states and 2219 transitions. [2020-10-29 13:14:21,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:14:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2219 transitions. [2020-10-29 13:14:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:14:21,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:21,486 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] [2020-10-29 13:14:21,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:14:21,487 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:21,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2091171779, now seen corresponding path program 1 times [2020-10-29 13:14:21,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:21,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312948317] [2020-10-29 13:14:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:21,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:21,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:21,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:21,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:24,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:24,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:14:24,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:14:24,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3480 [2020-10-29 13:14:24,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:24,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:24,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:14:24,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:24,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:14:24,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:25,488 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:14:25,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:25,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:25,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:25,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:25,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:25,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:14:25,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:25,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:25,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:25,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:25,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:25,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:25,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312948317] [2020-10-29 13:14:25,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:25,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:14:25,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279174910] [2020-10-29 13:14:25,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:14:25,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:14:25,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:25,518 INFO L87 Difference]: Start difference. First operand 1521 states and 2219 transitions. Second operand 9 states. [2020-10-29 13:14:25,980 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-29 13:14:27,334 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-29 13:14:28,326 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 13:14:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:28,480 INFO L93 Difference]: Finished difference Result 1843 states and 2707 transitions. [2020-10-29 13:14:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:28,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-29 13:14:28,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:28,485 INFO L225 Difference]: With dead ends: 1843 [2020-10-29 13:14:28,486 INFO L226 Difference]: Without dead ends: 1826 [2020-10-29 13:14:28,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:14:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2020-10-29 13:14:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1506. [2020-10-29 13:14:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2020-10-29 13:14:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2200 transitions. [2020-10-29 13:14:28,639 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2200 transitions. Word has length 57 [2020-10-29 13:14:28,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:28,640 INFO L481 AbstractCegarLoop]: Abstraction has 1506 states and 2200 transitions. [2020-10-29 13:14:28,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:14:28,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2200 transitions. [2020-10-29 13:14:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:14:28,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:28,641 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] [2020-10-29 13:14:28,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:14:28,641 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:28,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:28,642 INFO L82 PathProgramCache]: Analyzing trace with hash 996190440, now seen corresponding path program 1 times [2020-10-29 13:14:28,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:28,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608349038] [2020-10-29 13:14:28,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:28,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:29,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:29,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:14:29,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:14:29,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-29 13:14:29,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:29,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:29,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:29,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:14:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:14:29,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:29,890 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:14:29,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:29,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:29,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:29,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:29,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:14:29,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:29,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:29,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:29,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:29,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:14:29,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:29,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608349038] [2020-10-29 13:14:29,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:29,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:29,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180506767] [2020-10-29 13:14:29,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:29,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:29,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:29,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:29,956 INFO L87 Difference]: Start difference. First operand 1506 states and 2200 transitions. Second operand 6 states. [2020-10-29 13:14:30,424 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-29 13:14:31,573 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-29 13:14:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:31,611 INFO L93 Difference]: Finished difference Result 1988 states and 2942 transitions. [2020-10-29 13:14:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:14:31,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-29 13:14:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:31,614 INFO L225 Difference]: With dead ends: 1988 [2020-10-29 13:14:31,614 INFO L226 Difference]: Without dead ends: 983 [2020-10-29 13:14:31,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-10-29 13:14:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 617. [2020-10-29 13:14:31,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-10-29 13:14:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 883 transitions. [2020-10-29 13:14:31,697 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 883 transitions. Word has length 57 [2020-10-29 13:14:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:31,697 INFO L481 AbstractCegarLoop]: Abstraction has 617 states and 883 transitions. [2020-10-29 13:14:31,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 883 transitions. [2020-10-29 13:14:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:14:31,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:31,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:31,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:14:31,700 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:31,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1333571428, now seen corresponding path program 1 times [2020-10-29 13:14:31,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:31,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722177811] [2020-10-29 13:14:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:31,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:31,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:31,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:31,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:31,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:32,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:32,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:32,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:32,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:33,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:36,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:14:36,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:14:36,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:14:36,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:36,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:36,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:36,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:14:36,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:14:36,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:37,175 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:14:37,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:37,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:37,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:37,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:14:37,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:37,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:37,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722177811] [2020-10-29 13:14:37,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:37,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:37,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098273472] [2020-10-29 13:14:37,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:37,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:37,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:37,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:37,209 INFO L87 Difference]: Start difference. First operand 617 states and 883 transitions. Second operand 6 states. [2020-10-29 13:14:37,695 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 13:14:38,839 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-29 13:14:39,302 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-29 13:14:39,790 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-29 13:14:40,200 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-29 13:14:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:40,427 INFO L93 Difference]: Finished difference Result 3491 states and 5287 transitions. [2020-10-29 13:14:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:40,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:14:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:40,435 INFO L225 Difference]: With dead ends: 3491 [2020-10-29 13:14:40,435 INFO L226 Difference]: Without dead ends: 3012 [2020-10-29 13:14:40,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:14:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2020-10-29 13:14:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 1093. [2020-10-29 13:14:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1093 states. [2020-10-29 13:14:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1591 transitions. [2020-10-29 13:14:40,615 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1591 transitions. Word has length 76 [2020-10-29 13:14:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:40,615 INFO L481 AbstractCegarLoop]: Abstraction has 1093 states and 1591 transitions. [2020-10-29 13:14:40,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1591 transitions. [2020-10-29 13:14:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:14:40,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:40,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:40,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:14:40,618 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:40,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1582715589, now seen corresponding path program 1 times [2020-10-29 13:14:40,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:40,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239380341] [2020-10-29 13:14:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:40,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:40,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:40,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:40,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:41,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:41,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:44,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:44,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:44,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:44,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:45,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:45,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:14:45,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:14:45,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:14:45,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:45,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:45,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:14:45,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:14:45,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:14:45,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:46,145 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:14:46,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:46,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:46,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:46,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:46,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:46,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:14:46,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:46,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:46,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:46,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239380341] [2020-10-29 13:14:46,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:46,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:14:46,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821829881] [2020-10-29 13:14:46,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:14:46,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:46,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:14:46,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:14:46,196 INFO L87 Difference]: Start difference. First operand 1093 states and 1591 transitions. Second operand 8 states. [2020-10-29 13:14:46,665 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-29 13:14:48,136 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-29 13:14:48,594 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-29 13:14:49,031 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 13:14:49,481 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-29 13:14:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:50,352 INFO L93 Difference]: Finished difference Result 7223 states and 10753 transitions. [2020-10-29 13:14:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:14:50,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-29 13:14:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:50,368 INFO L225 Difference]: With dead ends: 7223 [2020-10-29 13:14:50,368 INFO L226 Difference]: Without dead ends: 6268 [2020-10-29 13:14:50,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:14:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6268 states. [2020-10-29 13:14:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6268 to 2285. [2020-10-29 13:14:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2285 states. [2020-10-29 13:14:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3415 transitions. [2020-10-29 13:14:50,832 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3415 transitions. Word has length 78 [2020-10-29 13:14:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:50,832 INFO L481 AbstractCegarLoop]: Abstraction has 2285 states and 3415 transitions. [2020-10-29 13:14:50,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:14:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3415 transitions. [2020-10-29 13:14:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:14:50,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:50,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:50,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:14:50,836 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:50,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1812839884, now seen corresponding path program 1 times [2020-10-29 13:14:50,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:50,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056735179] [2020-10-29 13:14:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:50,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:50,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:50,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:50,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:55,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:14:55,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:14:55,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:14:55,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:55,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:55,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:55,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:14:55,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:14:55,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:56,372 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:14:56,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:56,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:56,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:56,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:56,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:14:56,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:56,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:56,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:56,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056735179] [2020-10-29 13:14:56,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:56,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601378881] [2020-10-29 13:14:56,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:56,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:56,412 INFO L87 Difference]: Start difference. First operand 2285 states and 3415 transitions. Second operand 6 states. [2020-10-29 13:14:56,835 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-29 13:14:58,169 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-29 13:14:58,608 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-29 13:14:59,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:59,134 INFO L93 Difference]: Finished difference Result 7242 states and 10857 transitions. [2020-10-29 13:14:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:14:59,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-29 13:14:59,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:59,148 INFO L225 Difference]: With dead ends: 7242 [2020-10-29 13:14:59,148 INFO L226 Difference]: Without dead ends: 5095 [2020-10-29 13:14:59,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:14:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5095 states. [2020-10-29 13:14:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5095 to 5089. [2020-10-29 13:14:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5089 states. [2020-10-29 13:14:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5089 states to 5089 states and 7479 transitions. [2020-10-29 13:14:59,956 INFO L78 Accepts]: Start accepts. Automaton has 5089 states and 7479 transitions. Word has length 78 [2020-10-29 13:14:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:59,956 INFO L481 AbstractCegarLoop]: Abstraction has 5089 states and 7479 transitions. [2020-10-29 13:14:59,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5089 states and 7479 transitions. [2020-10-29 13:14:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:14:59,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:59,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:59,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:14:59,960 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash 248458988, now seen corresponding path program 1 times [2020-10-29 13:14:59,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:59,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015813387] [2020-10-29 13:14:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:00,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:04,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:15:04,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:15:04,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:15:04,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:04,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:04,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:04,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:15:04,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:15:04,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:05,467 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:15:05,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:05,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:05,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:05,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:05,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:05,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:05,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:05,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:05,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:05,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:05,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:05,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015813387] [2020-10-29 13:15:05,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:05,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:05,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684884281] [2020-10-29 13:15:05,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:05,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:05,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:05,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:05,512 INFO L87 Difference]: Start difference. First operand 5089 states and 7479 transitions. Second operand 6 states. [2020-10-29 13:15:06,001 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-29 13:15:07,175 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 13:15:07,639 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 13:15:08,641 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-29 13:15:09,198 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:15:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:10,053 INFO L93 Difference]: Finished difference Result 18255 states and 26943 transitions. [2020-10-29 13:15:10,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:15:10,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-29 13:15:10,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:10,091 INFO L225 Difference]: With dead ends: 18255 [2020-10-29 13:15:10,092 INFO L226 Difference]: Without dead ends: 13480 [2020-10-29 13:15:10,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:15:10,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13480 states. [2020-10-29 13:15:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13480 to 5089. [2020-10-29 13:15:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5089 states. [2020-10-29 13:15:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5089 states to 5089 states and 7443 transitions. [2020-10-29 13:15:11,084 INFO L78 Accepts]: Start accepts. Automaton has 5089 states and 7443 transitions. Word has length 78 [2020-10-29 13:15:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:11,085 INFO L481 AbstractCegarLoop]: Abstraction has 5089 states and 7443 transitions. [2020-10-29 13:15:11,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 5089 states and 7443 transitions. [2020-10-29 13:15:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:15:11,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:11,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:11,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:15:11,088 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash 837102395, now seen corresponding path program 1 times [2020-10-29 13:15:11,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:11,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105789542] [2020-10-29 13:15:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:11,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:16,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:15:16,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:15:16,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:15:16,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:16,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:16,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:16,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:15:16,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 13:15:16,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:16,682 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:15:16,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:16,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:16,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:16,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:16,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:15:16,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:16,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:16,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:15:16,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:16,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:15:16,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:16,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105789542] [2020-10-29 13:15:16,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:16,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:15:16,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933058808] [2020-10-29 13:15:16,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:16,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:16,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:16,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:16,779 INFO L87 Difference]: Start difference. First operand 5089 states and 7443 transitions. Second operand 8 states. [2020-10-29 13:15:17,232 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-29 13:15:18,574 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-29 13:15:19,022 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-29 13:15:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:21,803 INFO L93 Difference]: Finished difference Result 24185 states and 35049 transitions. [2020-10-29 13:15:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:15:21,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-29 13:15:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:21,837 INFO L225 Difference]: With dead ends: 24185 [2020-10-29 13:15:21,837 INFO L226 Difference]: Without dead ends: 19410 [2020-10-29 13:15:21,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:15:21,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19410 states. [2020-10-29 13:15:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19410 to 10461. [2020-10-29 13:15:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10461 states. [2020-10-29 13:15:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10461 states to 10461 states and 15183 transitions. [2020-10-29 13:15:23,482 INFO L78 Accepts]: Start accepts. Automaton has 10461 states and 15183 transitions. Word has length 78 [2020-10-29 13:15:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:23,482 INFO L481 AbstractCegarLoop]: Abstraction has 10461 states and 15183 transitions. [2020-10-29 13:15:23,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 10461 states and 15183 transitions. [2020-10-29 13:15:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:15:23,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:23,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:23,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:15:23,485 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:23,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1218629829, now seen corresponding path program 1 times [2020-10-29 13:15:23,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:23,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322289279] [2020-10-29 13:15:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:23,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:28,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:15:28,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:15:28,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:15:28,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:28,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:28,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:28,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:15:28,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:15:28,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:28,947 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:15:28,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:28,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:28,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:28,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:28,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:28,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:28,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:28,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:28,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:28,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:28,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:28,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322289279] [2020-10-29 13:15:28,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:28,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:28,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358648776] [2020-10-29 13:15:28,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:28,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:28,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:28,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:28,978 INFO L87 Difference]: Start difference. First operand 10461 states and 15183 transitions. Second operand 6 states. [2020-10-29 13:15:29,392 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:15:30,893 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:15:31,334 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-29 13:15:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:33,160 INFO L93 Difference]: Finished difference Result 17892 states and 25885 transitions. [2020-10-29 13:15:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:15:33,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-29 13:15:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:33,173 INFO L225 Difference]: With dead ends: 17892 [2020-10-29 13:15:33,174 INFO L226 Difference]: Without dead ends: 12813 [2020-10-29 13:15:33,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:15:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12813 states. [2020-10-29 13:15:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12813 to 10353. [2020-10-29 13:15:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10353 states. [2020-10-29 13:15:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10353 states to 10353 states and 14923 transitions. [2020-10-29 13:15:34,675 INFO L78 Accepts]: Start accepts. Automaton has 10353 states and 14923 transitions. Word has length 78 [2020-10-29 13:15:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:34,676 INFO L481 AbstractCegarLoop]: Abstraction has 10353 states and 14923 transitions. [2020-10-29 13:15:34,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 10353 states and 14923 transitions. [2020-10-29 13:15:34,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 13:15:34,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:34,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:34,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:15:34,680 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:34,680 INFO L82 PathProgramCache]: Analyzing trace with hash -133219427, now seen corresponding path program 1 times [2020-10-29 13:15:34,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:34,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662816303] [2020-10-29 13:15:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:34,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:36,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:36,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:39,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 13:15:39,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:15:39,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:15:39,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:39,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:15:39,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:40,181 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:15:40,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:40,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:40,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:40,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:40,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:40,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:40,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:40,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:40,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662816303] [2020-10-29 13:15:40,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:40,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:40,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841928446] [2020-10-29 13:15:40,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:40,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:40,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:40,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:40,213 INFO L87 Difference]: Start difference. First operand 10353 states and 14923 transitions. Second operand 8 states. [2020-10-29 13:15:40,708 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-29 13:15:42,039 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:15:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:44,047 INFO L93 Difference]: Finished difference Result 25534 states and 36794 transitions. [2020-10-29 13:15:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:15:44,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-10-29 13:15:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:44,068 INFO L225 Difference]: With dead ends: 25534 [2020-10-29 13:15:44,069 INFO L226 Difference]: Without dead ends: 15380 [2020-10-29 13:15:44,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:15:44,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15380 states. [2020-10-29 13:15:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15380 to 10353. [2020-10-29 13:15:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10353 states. [2020-10-29 13:15:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10353 states to 10353 states and 14920 transitions. [2020-10-29 13:15:45,614 INFO L78 Accepts]: Start accepts. Automaton has 10353 states and 14920 transitions. Word has length 79 [2020-10-29 13:15:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:45,614 INFO L481 AbstractCegarLoop]: Abstraction has 10353 states and 14920 transitions. [2020-10-29 13:15:45,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 10353 states and 14920 transitions. [2020-10-29 13:15:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:15:45,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:45,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:45,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 13:15:45,617 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash -293601320, now seen corresponding path program 1 times [2020-10-29 13:15:45,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:45,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062802032] [2020-10-29 13:15:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:45,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:45,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:45,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:45,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:46,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:48,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:48,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:15:48,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:15:48,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2737 [2020-10-29 13:15:48,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:48,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:48,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:15:48,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-29 13:15:48,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 13:15:48,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:48,893 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:15:48,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:48,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:48,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:48,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:48,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:48,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:15:48,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:48,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:48,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:48,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:48,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:48,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:48,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062802032] [2020-10-29 13:15:48,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:48,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:15:48,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240405860] [2020-10-29 13:15:48,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:15:48,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:15:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:15:48,936 INFO L87 Difference]: Start difference. First operand 10353 states and 14920 transitions. Second operand 4 states. [2020-10-29 13:15:49,378 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:15:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:51,597 INFO L93 Difference]: Finished difference Result 19351 states and 27764 transitions. [2020-10-29 13:15:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:15:51,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-29 13:15:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:51,609 INFO L225 Difference]: With dead ends: 19351 [2020-10-29 13:15:51,609 INFO L226 Difference]: Without dead ends: 9246 [2020-10-29 13:15:51,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:15:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9246 states. [2020-10-29 13:15:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9246 to 7449. [2020-10-29 13:15:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7449 states. [2020-10-29 13:15:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7449 states to 7449 states and 10376 transitions. [2020-10-29 13:15:52,853 INFO L78 Accepts]: Start accepts. Automaton has 7449 states and 10376 transitions. Word has length 81 [2020-10-29 13:15:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:52,853 INFO L481 AbstractCegarLoop]: Abstraction has 7449 states and 10376 transitions. [2020-10-29 13:15:52,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:15:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 7449 states and 10376 transitions. [2020-10-29 13:15:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:15:52,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:52,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:52,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 13:15:52,855 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:52,855 INFO L82 PathProgramCache]: Analyzing trace with hash 493698922, now seen corresponding path program 1 times [2020-10-29 13:15:52,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:52,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262300418] [2020-10-29 13:15:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:52,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:53,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:54,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:54,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:15:54,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:15:54,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1389 [2020-10-29 13:15:54,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:54,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:15:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-29 13:15:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 13:15:54,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:54,675 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:15:54,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:54,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:54,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:54,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:54,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:54,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:15:54,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:54,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:54,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:54,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:54,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:54,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:54,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262300418] [2020-10-29 13:15:54,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:54,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:15:54,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23766365] [2020-10-29 13:15:54,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:15:54,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:54,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:15:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:15:54,708 INFO L87 Difference]: Start difference. First operand 7449 states and 10376 transitions. Second operand 4 states. [2020-10-29 13:15:55,127 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 13:15:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:57,924 INFO L93 Difference]: Finished difference Result 21183 states and 29372 transitions. [2020-10-29 13:15:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:15:57,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-29 13:15:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:57,942 INFO L225 Difference]: With dead ends: 21183 [2020-10-29 13:15:57,942 INFO L226 Difference]: Without dead ends: 13872 [2020-10-29 13:15:57,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:15:57,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13872 states. [2020-10-29 13:15:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13872 to 12597. [2020-10-29 13:15:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12597 states. [2020-10-29 13:16:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12597 states to 12597 states and 17304 transitions. [2020-10-29 13:16:00,015 INFO L78 Accepts]: Start accepts. Automaton has 12597 states and 17304 transitions. Word has length 82 [2020-10-29 13:16:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:00,015 INFO L481 AbstractCegarLoop]: Abstraction has 12597 states and 17304 transitions. [2020-10-29 13:16:00,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:16:00,015 INFO L276 IsEmpty]: Start isEmpty. Operand 12597 states and 17304 transitions. [2020-10-29 13:16:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:16:00,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:00,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:00,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 13:16:00,017 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:00,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:00,017 INFO L82 PathProgramCache]: Analyzing trace with hash -770067963, now seen corresponding path program 1 times [2020-10-29 13:16:00,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:00,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910265771] [2020-10-29 13:16:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:00,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:02,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:02,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:02,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:05,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:16:05,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:16:05,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:16:05,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:05,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 13:16:05,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:16:05,488 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:16:05,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:05,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:05,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:05,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:05,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:16:05,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:05,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:05,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:05,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:05,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:05,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:05,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910265771] [2020-10-29 13:16:05,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:05,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:05,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766824203] [2020-10-29 13:16:05,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:05,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:05,546 INFO L87 Difference]: Start difference. First operand 12597 states and 17304 transitions. Second operand 6 states.