/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=SHALLOWEST --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.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:32:34,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:32:34,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:32:34,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:32:34,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:32:34,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:32:34,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:32:34,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:32:34,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:32:34,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:32:34,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:32:34,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:32:34,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:32:34,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:32:34,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:32:34,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:32:34,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:32:34,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:32:34,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:32:34,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:32:34,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:32:34,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:32:34,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:32:34,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:32:34,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:32:34,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:32:34,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:32:34,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:32:34,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:32:34,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:32:34,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:32:34,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:32:34,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:32:34,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:32:34,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:32:34,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:32:34,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:32:34,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:32:34,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:32:34,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:32:34,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:32:34,525 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 [2020-10-27 05:32:34,559 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:32:34,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:32:34,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:32:34,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:32:34,564 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:32:34,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:32:34,566 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:32:34,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:32:34,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:32:34,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:32:34,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:32:34,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:32:34,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:32:34,567 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:32:34,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:32:34,567 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:32:34,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:32:34,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:32:34,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:32:34,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:32:34,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:32:34,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:32:34,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:32:34,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:32:34,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:32:34,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:32:34,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:32:34,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:32:34,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:32:34,571 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:32:34,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:32:34,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:32:34,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:32:34,978 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:32:34,978 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:32:34,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:32:35,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00dc07c33/b519bfd5fc1f4241b78dfa5e2cc74891/FLAG02cfcd212 [2020-10-27 05:32:35,759 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:32:35,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:32:35,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00dc07c33/b519bfd5fc1f4241b78dfa5e2cc74891/FLAG02cfcd212 [2020-10-27 05:32:36,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00dc07c33/b519bfd5fc1f4241b78dfa5e2cc74891 [2020-10-27 05:32:36,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:32:36,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:32:36,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:32:36,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:32:36,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:32:36,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:32:36" (1/1) ... [2020-10-27 05:32:36,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f01629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36, skipping insertion in model container [2020-10-27 05:32:36,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:32:36" (1/1) ... [2020-10-27 05:32:36,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:32:36,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:32:36,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:32:36,590 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:32:36,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:32:36,743 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:32:36,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36 WrapperNode [2020-10-27 05:32:36,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:32:36,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:32:36,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:32:36,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:32:36,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36" (1/1) ... [2020-10-27 05:32:36,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36" (1/1) ... [2020-10-27 05:32:36,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36" (1/1) ... [2020-10-27 05:32:36,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36" (1/1) ... [2020-10-27 05:32:36,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36" (1/1) ... [2020-10-27 05:32:36,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36" (1/1) ... [2020-10-27 05:32:36,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36" (1/1) ... [2020-10-27 05:32:36,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:32:36,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:32:36,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:32:36,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:32:36,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36" (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 [2020-10-27 05:32:36,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:32:36,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:32:36,904 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:32:36,905 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:32:36,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:32:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:32:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:32:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:32:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:32:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:32:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:32:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:32:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:32:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:32:36,910 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:32:36,911 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:32:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:32:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:32:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:32:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:32:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:32:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:32:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-27 05:32:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure node8 [2020-10-27 05:32:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:32:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:32:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:32:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:32:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:32:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:32:36,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:32:36,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:32:36,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:32:38,003 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:32:38,003 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:32:38,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:32:38 BoogieIcfgContainer [2020-10-27 05:32:38,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:32:38,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:32:38,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:32:38,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:32:38,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:32:36" (1/3) ... [2020-10-27 05:32:38,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44abbe77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:32:38, skipping insertion in model container [2020-10-27 05:32:38,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:32:36" (2/3) ... [2020-10-27 05:32:38,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44abbe77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:32:38, skipping insertion in model container [2020-10-27 05:32:38,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:32:38" (3/3) ... [2020-10-27 05:32:38,016 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:32:38,029 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:32:38,036 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:32:38,051 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:32:38,081 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:32:38,082 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:32:38,082 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:32:38,082 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:32:38,082 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:32:38,082 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:32:38,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:32:38,083 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:32:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-10-27 05:32:38,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 05:32:38,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:38,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:38,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:38,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1935783955, now seen corresponding path program 1 times [2020-10-27 05:32:38,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:38,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505745219] [2020-10-27 05:32:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:38,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:38,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:39,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:39,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:40,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:42,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:42,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:43,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:43,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 05:32:43,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:32:43,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:32:43,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:43,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:32:43,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:32:43,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 05:32:43,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:32:44,255 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:32:44,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:44,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:44,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:44,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:44,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:44,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 05:32:44,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:44,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:32:44,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:44,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:32:44,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:32:44,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505745219] [2020-10-27 05:32:44,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:44,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:32:44,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532272392] [2020-10-27 05:32:44,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:32:44,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:44,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:32:44,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:32:44,449 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 6 states. [2020-10-27 05:32:44,939 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 05:32:46,410 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-27 05:32:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:46,447 INFO L93 Difference]: Finished difference Result 365 states and 589 transitions. [2020-10-27 05:32:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:32:46,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2020-10-27 05:32:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:46,461 INFO L225 Difference]: With dead ends: 365 [2020-10-27 05:32:46,461 INFO L226 Difference]: Without dead ends: 253 [2020-10-27 05:32:46,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:32:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-27 05:32:46,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2020-10-27 05:32:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-27 05:32:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 357 transitions. [2020-10-27 05:32:46,539 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 357 transitions. Word has length 107 [2020-10-27 05:32:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:46,540 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 357 transitions. [2020-10-27 05:32:46,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:32:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 357 transitions. [2020-10-27 05:32:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 05:32:46,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:46,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:46,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:32:46,547 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:46,548 INFO L82 PathProgramCache]: Analyzing trace with hash -85139672, now seen corresponding path program 1 times [2020-10-27 05:32:46,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:46,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819067025] [2020-10-27 05:32:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:46,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:46,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:46,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:46,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:47,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:47,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:50,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:50,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:51,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:51,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 05:32:51,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:32:51,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 05:32:51,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:51,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:32:51,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:32:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 05:32:51,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:52,113 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:32:52,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:52,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:52,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:52,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:52,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:32:52,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:52,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:32:52,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:52,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:32:52,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:32:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:32:52,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819067025] [2020-10-27 05:32:52,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:52,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:32:52,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787197563] [2020-10-27 05:32:52,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:32:52,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:52,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:32:52,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:32:52,221 INFO L87 Difference]: Start difference. First operand 250 states and 357 transitions. Second operand 11 states. [2020-10-27 05:32:52,676 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-27 05:32:54,296 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 05:32:54,622 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:32:54,992 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-27 05:32:55,405 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-27 05:32:55,783 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:32:56,166 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 05:32:56,583 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 05:32:57,001 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:32:57,363 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-27 05:32:57,744 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 05:32:58,149 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-27 05:32:58,550 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:32:58,961 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 05:32:59,292 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:32:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:59,553 INFO L93 Difference]: Finished difference Result 3162 states and 4981 transitions. [2020-10-27 05:32:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:32:59,553 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 107 [2020-10-27 05:32:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:59,573 INFO L225 Difference]: With dead ends: 3162 [2020-10-27 05:32:59,574 INFO L226 Difference]: Without dead ends: 2980 [2020-10-27 05:32:59,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=420, Invalid=1062, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 05:32:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2020-10-27 05:32:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 429. [2020-10-27 05:32:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-27 05:32:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 640 transitions. [2020-10-27 05:32:59,690 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 640 transitions. Word has length 107 [2020-10-27 05:32:59,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:59,691 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 640 transitions. [2020-10-27 05:32:59,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:32:59,691 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 640 transitions. [2020-10-27 05:32:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:32:59,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:59,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:59,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:32:59,697 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:59,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2128104347, now seen corresponding path program 1 times [2020-10-27 05:32:59,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:59,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997606185] [2020-10-27 05:32:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:59,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:59,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:59,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:00,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:00,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:00,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:01,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:04,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:04,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:33:04,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:33:04,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:33:04,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:04,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:33:04,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:04,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:33:04,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:05,186 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:33:05,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:05,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:05,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:05,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:05,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:05,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 05:33:05,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:05,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:05,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:05,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:05,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:33:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:05,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997606185] [2020-10-27 05:33:05,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:05,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:33:05,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007950591] [2020-10-27 05:33:05,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:33:05,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:05,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:33:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:33:05,334 INFO L87 Difference]: Start difference. First operand 429 states and 640 transitions. Second operand 7 states. [2020-10-27 05:33:05,631 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:33:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:06,682 INFO L93 Difference]: Finished difference Result 1396 states and 2168 transitions. [2020-10-27 05:33:06,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:33:06,683 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 05:33:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:06,690 INFO L225 Difference]: With dead ends: 1396 [2020-10-27 05:33:06,690 INFO L226 Difference]: Without dead ends: 1035 [2020-10-27 05:33:06,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:33:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-10-27 05:33:06,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 452. [2020-10-27 05:33:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2020-10-27 05:33:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 672 transitions. [2020-10-27 05:33:06,757 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 672 transitions. Word has length 109 [2020-10-27 05:33:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:06,758 INFO L481 AbstractCegarLoop]: Abstraction has 452 states and 672 transitions. [2020-10-27 05:33:06,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:33:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 672 transitions. [2020-10-27 05:33:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:33:06,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:06,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:06,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:33:06,761 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:06,762 INFO L82 PathProgramCache]: Analyzing trace with hash -774519019, now seen corresponding path program 1 times [2020-10-27 05:33:06,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:06,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577096251] [2020-10-27 05:33:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:06,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:06,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:07,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:07,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:07,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:08,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:08,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:11,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:11,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:33:11,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:33:11,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:33:11,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:11,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:33:11,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:11,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 05:33:11,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:12,373 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:33:12,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:12,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:12,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:12,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:12,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:12,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 05:33:12,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:12,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:12,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:12,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:12,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:33:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:12,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577096251] [2020-10-27 05:33:12,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:12,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:33:12,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971116334] [2020-10-27 05:33:12,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:33:12,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:12,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:33:12,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:33:12,530 INFO L87 Difference]: Start difference. First operand 452 states and 672 transitions. Second operand 7 states. [2020-10-27 05:33:12,885 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:33:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:13,993 INFO L93 Difference]: Finished difference Result 1380 states and 2137 transitions. [2020-10-27 05:33:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:33:13,994 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 05:33:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:14,000 INFO L225 Difference]: With dead ends: 1380 [2020-10-27 05:33:14,000 INFO L226 Difference]: Without dead ends: 1019 [2020-10-27 05:33:14,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:33:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2020-10-27 05:33:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 476. [2020-10-27 05:33:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-27 05:33:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 705 transitions. [2020-10-27 05:33:14,069 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 705 transitions. Word has length 109 [2020-10-27 05:33:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:14,070 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 705 transitions. [2020-10-27 05:33:14,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:33:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 705 transitions. [2020-10-27 05:33:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:33:14,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:14,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:14,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:33:14,072 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1265226993, now seen corresponding path program 1 times [2020-10-27 05:33:14,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:14,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808803398] [2020-10-27 05:33:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:14,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:14,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:14,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:14,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:14,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:14,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:15,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:15,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:19,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:19,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:33:19,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:33:19,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:33:19,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:33:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 05:33:19,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:19,503 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:33:19,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:19,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:19,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:19,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:19,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:19,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 05:33:19,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:19,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:19,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808803398] [2020-10-27 05:33:19,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:19,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:33:19,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223055179] [2020-10-27 05:33:19,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:33:19,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:19,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:33:19,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:33:19,612 INFO L87 Difference]: Start difference. First operand 476 states and 705 transitions. Second operand 7 states. [2020-10-27 05:33:19,962 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-27 05:33:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:21,246 INFO L93 Difference]: Finished difference Result 1370 states and 2118 transitions. [2020-10-27 05:33:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:33:21,246 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 05:33:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:21,253 INFO L225 Difference]: With dead ends: 1370 [2020-10-27 05:33:21,253 INFO L226 Difference]: Without dead ends: 1009 [2020-10-27 05:33:21,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:33:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2020-10-27 05:33:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 506. [2020-10-27 05:33:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-10-27 05:33:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 747 transitions. [2020-10-27 05:33:21,348 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 747 transitions. Word has length 109 [2020-10-27 05:33:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:21,349 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 747 transitions. [2020-10-27 05:33:21,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:33:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 747 transitions. [2020-10-27 05:33:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:33:21,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:21,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:21,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:33:21,351 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1912811529, now seen corresponding path program 1 times [2020-10-27 05:33:21,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:21,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783002099] [2020-10-27 05:33:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:21,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:21,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:21,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:21,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:21,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:21,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:22,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:26,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:26,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:33:26,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:33:26,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:33:26,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:26,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:26,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 05:33:26,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:33:26,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:26,787 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:33:26,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:26,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:26,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:26,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:26,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:26,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:33:26,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:26,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:33:26,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:26,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:33:26,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:26,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783002099] [2020-10-27 05:33:26,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:26,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:33:26,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156015902] [2020-10-27 05:33:26,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:33:26,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:33:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:33:26,856 INFO L87 Difference]: Start difference. First operand 506 states and 747 transitions. Second operand 4 states. [2020-10-27 05:33:27,211 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:33:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:28,354 INFO L93 Difference]: Finished difference Result 1235 states and 1893 transitions. [2020-10-27 05:33:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:33:28,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-27 05:33:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:28,360 INFO L225 Difference]: With dead ends: 1235 [2020-10-27 05:33:28,361 INFO L226 Difference]: Without dead ends: 829 [2020-10-27 05:33:28,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:33:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2020-10-27 05:33:28,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 826. [2020-10-27 05:33:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2020-10-27 05:33:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1252 transitions. [2020-10-27 05:33:28,501 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1252 transitions. Word has length 109 [2020-10-27 05:33:28,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:28,502 INFO L481 AbstractCegarLoop]: Abstraction has 826 states and 1252 transitions. [2020-10-27 05:33:28,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:33:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1252 transitions. [2020-10-27 05:33:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 05:33:28,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:28,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:28,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:33:28,507 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:28,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1437236511, now seen corresponding path program 1 times [2020-10-27 05:33:28,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:28,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823069505] [2020-10-27 05:33:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:28,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:28,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:28,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:28,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:29,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:29,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:29,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:31,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:32,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:33,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:33,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 05:33:33,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:33:33,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:33:33,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:33,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:33:33,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:33,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 05:33:33,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:34,007 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:33:34,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:34,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:34,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:34,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:34,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:34,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 05:33:34,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:34,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:34,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:34,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:34,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:34,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823069505] [2020-10-27 05:33:34,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:34,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:33:34,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287637345] [2020-10-27 05:33:34,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:33:34,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:34,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:33:34,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:33:34,130 INFO L87 Difference]: Start difference. First operand 826 states and 1252 transitions. Second operand 7 states. [2020-10-27 05:33:34,500 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:33:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:35,962 INFO L93 Difference]: Finished difference Result 2296 states and 3561 transitions. [2020-10-27 05:33:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:33:35,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-27 05:33:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:35,974 INFO L225 Difference]: With dead ends: 2296 [2020-10-27 05:33:35,974 INFO L226 Difference]: Without dead ends: 1609 [2020-10-27 05:33:35,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:33:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2020-10-27 05:33:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 964. [2020-10-27 05:33:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2020-10-27 05:33:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1466 transitions. [2020-10-27 05:33:36,132 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1466 transitions. Word has length 110 [2020-10-27 05:33:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:36,132 INFO L481 AbstractCegarLoop]: Abstraction has 964 states and 1466 transitions. [2020-10-27 05:33:36,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:33:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1466 transitions. [2020-10-27 05:33:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 05:33:36,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:36,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:36,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:33:36,135 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:36,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:36,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1667149129, now seen corresponding path program 1 times [2020-10-27 05:33:36,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:36,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252086227] [2020-10-27 05:33:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:36,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:37,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:37,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:38,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:41,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:41,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 05:33:41,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:33:41,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:33:41,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:33:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 05:33:41,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:41,533 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:33:41,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:41,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:41,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:41,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:41,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:41,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:33:41,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:41,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:33:41,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:41,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:33:41,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:41,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252086227] [2020-10-27 05:33:41,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:41,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:33:41,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985240731] [2020-10-27 05:33:41,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:33:41,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:41,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:33:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:33:41,603 INFO L87 Difference]: Start difference. First operand 964 states and 1466 transitions. Second operand 4 states. [2020-10-27 05:33:41,969 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:33:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:42,815 INFO L93 Difference]: Finished difference Result 2259 states and 3484 transitions. [2020-10-27 05:33:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:33:42,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-27 05:33:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:42,822 INFO L225 Difference]: With dead ends: 2259 [2020-10-27 05:33:42,823 INFO L226 Difference]: Without dead ends: 1370 [2020-10-27 05:33:42,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:33:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2020-10-27 05:33:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1363. [2020-10-27 05:33:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1363 states. [2020-10-27 05:33:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2079 transitions. [2020-10-27 05:33:43,006 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2079 transitions. Word has length 110 [2020-10-27 05:33:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:43,006 INFO L481 AbstractCegarLoop]: Abstraction has 1363 states and 2079 transitions. [2020-10-27 05:33:43,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:33:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2079 transitions. [2020-10-27 05:33:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 05:33:43,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:43,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:43,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:33:43,009 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:43,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1045619496, now seen corresponding path program 1 times [2020-10-27 05:33:43,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:43,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760451269] [2020-10-27 05:33:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:43,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:43,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:43,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:43,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:43,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:43,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:44,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:48,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:48,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 05:33:48,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:33:48,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 05:33:48,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:48,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:33:48,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:33:48,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 05:33:48,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:48,615 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:33:48,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:48,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:48,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:48,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:48,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:48,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:33:48,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:48,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:33:48,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:48,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:33:48,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:48,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760451269] [2020-10-27 05:33:48,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:48,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:33:48,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953388316] [2020-10-27 05:33:48,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:33:48,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:33:48,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:33:48,720 INFO L87 Difference]: Start difference. First operand 1363 states and 2079 transitions. Second operand 11 states. [2020-10-27 05:33:49,247 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 246 [2020-10-27 05:33:50,881 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:33:51,318 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 05:33:51,725 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:33:52,270 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 243 [2020-10-27 05:33:52,707 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:33:53,136 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-27 05:33:53,519 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-27 05:33:54,785 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:33:55,165 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-27 05:33:55,569 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:33:56,078 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 241 [2020-10-27 05:33:56,496 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 05:33:56,879 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 05:33:57,291 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-27 05:33:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:57,667 INFO L93 Difference]: Finished difference Result 9187 states and 14342 transitions. [2020-10-27 05:33:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:33:57,668 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 110 [2020-10-27 05:33:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:57,708 INFO L225 Difference]: With dead ends: 9187 [2020-10-27 05:33:57,708 INFO L226 Difference]: Without dead ends: 8182 [2020-10-27 05:33:57,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=420, Invalid=1062, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 05:33:57,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2020-10-27 05:33:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 1363. [2020-10-27 05:33:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1363 states. [2020-10-27 05:33:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2073 transitions. [2020-10-27 05:33:58,048 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2073 transitions. Word has length 110 [2020-10-27 05:33:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:58,049 INFO L481 AbstractCegarLoop]: Abstraction has 1363 states and 2073 transitions. [2020-10-27 05:33:58,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:33:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2073 transitions. [2020-10-27 05:33:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 05:33:58,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:58,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:58,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:33:58,052 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:58,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2121628903, now seen corresponding path program 1 times [2020-10-27 05:33:58,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:58,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447218041] [2020-10-27 05:33:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:58,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:58,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:58,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:58,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:58,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:58,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:58,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:00,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:00,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:03,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:03,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 05:34:03,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:34:03,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:34:03,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:03,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:34:03,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:03,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 05:34:03,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:03,521 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:34:03,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:03,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:03,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:03,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:03,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:03,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:34:03,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:03,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:03,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:03,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:03,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:03,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447218041] [2020-10-27 05:34:03,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:03,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:34:03,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780772424] [2020-10-27 05:34:03,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:34:03,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:03,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:34:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:34:03,601 INFO L87 Difference]: Start difference. First operand 1363 states and 2073 transitions. Second operand 7 states. [2020-10-27 05:34:03,984 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:34:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:05,567 INFO L93 Difference]: Finished difference Result 3431 states and 5282 transitions. [2020-10-27 05:34:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:34:05,568 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-27 05:34:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:05,579 INFO L225 Difference]: With dead ends: 3431 [2020-10-27 05:34:05,579 INFO L226 Difference]: Without dead ends: 2390 [2020-10-27 05:34:05,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:34:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2020-10-27 05:34:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1351. [2020-10-27 05:34:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1351 states. [2020-10-27 05:34:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 2043 transitions. [2020-10-27 05:34:05,839 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 2043 transitions. Word has length 110 [2020-10-27 05:34:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:05,840 INFO L481 AbstractCegarLoop]: Abstraction has 1351 states and 2043 transitions. [2020-10-27 05:34:05,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:34:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 2043 transitions. [2020-10-27 05:34:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 05:34:05,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:05,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:05,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:34:05,842 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:05,843 INFO L82 PathProgramCache]: Analyzing trace with hash -836739219, now seen corresponding path program 1 times [2020-10-27 05:34:05,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:05,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450973038] [2020-10-27 05:34:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:05,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:05,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:06,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:06,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:06,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:06,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:09,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:09,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:10,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:10,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 05:34:10,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:34:10,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:34:10,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:10,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:34:10,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:10,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 05:34:10,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:11,343 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:34:11,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:11,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:11,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:11,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:11,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:11,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:34:11,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:11,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:11,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450973038] [2020-10-27 05:34:11,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:11,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:34:11,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330299403] [2020-10-27 05:34:11,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:34:11,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:34:11,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:34:11,441 INFO L87 Difference]: Start difference. First operand 1351 states and 2043 transitions. Second operand 7 states. [2020-10-27 05:34:11,812 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:34:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:13,338 INFO L93 Difference]: Finished difference Result 3587 states and 5510 transitions. [2020-10-27 05:34:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:34:13,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-27 05:34:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:13,348 INFO L225 Difference]: With dead ends: 3587 [2020-10-27 05:34:13,348 INFO L226 Difference]: Without dead ends: 2498 [2020-10-27 05:34:13,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:34:13,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2020-10-27 05:34:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1339. [2020-10-27 05:34:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2020-10-27 05:34:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 2013 transitions. [2020-10-27 05:34:13,684 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 2013 transitions. Word has length 110 [2020-10-27 05:34:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:13,685 INFO L481 AbstractCegarLoop]: Abstraction has 1339 states and 2013 transitions. [2020-10-27 05:34:13,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:34:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 2013 transitions. [2020-10-27 05:34:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 05:34:13,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:13,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:13,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:34:13,687 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash 9710195, now seen corresponding path program 1 times [2020-10-27 05:34:13,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:13,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903056917] [2020-10-27 05:34:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:13,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:13,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:13,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:13,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:13,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:14,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:16,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:18,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:18,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 05:34:18,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:34:18,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:34:18,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:18,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:34:18,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:18,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 05:34:18,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:19,165 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:34:19,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:19,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:19,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:19,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:19,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:19,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:34:19,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:19,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:19,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:19,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:19,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:19,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903056917] [2020-10-27 05:34:19,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:19,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:34:19,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907189189] [2020-10-27 05:34:19,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:34:19,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:19,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:34:19,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:34:19,248 INFO L87 Difference]: Start difference. First operand 1339 states and 2013 transitions. Second operand 7 states. [2020-10-27 05:34:19,607 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:34:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:21,088 INFO L93 Difference]: Finished difference Result 3703 states and 5684 transitions. [2020-10-27 05:34:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:34:21,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-27 05:34:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:21,102 INFO L225 Difference]: With dead ends: 3703 [2020-10-27 05:34:21,102 INFO L226 Difference]: Without dead ends: 2570 [2020-10-27 05:34:21,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:34:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-10-27 05:34:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1291. [2020-10-27 05:34:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1291 states. [2020-10-27 05:34:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1939 transitions. [2020-10-27 05:34:21,445 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1939 transitions. Word has length 110 [2020-10-27 05:34:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:21,445 INFO L481 AbstractCegarLoop]: Abstraction has 1291 states and 1939 transitions. [2020-10-27 05:34:21,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:34:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1939 transitions. [2020-10-27 05:34:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 05:34:21,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:21,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:21,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:34:21,448 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:21,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:21,448 INFO L82 PathProgramCache]: Analyzing trace with hash 291743458, now seen corresponding path program 1 times [2020-10-27 05:34:21,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:21,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682849815] [2020-10-27 05:34:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:21,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:21,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:21,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:21,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:21,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:21,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:21,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:24,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:24,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:24,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:26,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:26,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 05:34:26,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:34:26,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:34:26,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:34:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:34:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 05:34:26,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:26,918 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:34:26,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:26,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:26,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:26,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:26,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:26,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:34:26,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:26,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:26,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:26,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:26,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:26,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682849815] [2020-10-27 05:34:26,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:26,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:34:26,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075439553] [2020-10-27 05:34:26,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:34:26,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:26,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:34:26,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:34:26,997 INFO L87 Difference]: Start difference. First operand 1291 states and 1939 transitions. Second operand 5 states. [2020-10-27 05:34:27,433 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:34:28,637 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:34:28,982 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:34:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:29,698 INFO L93 Difference]: Finished difference Result 2648 states and 4065 transitions. [2020-10-27 05:34:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:34:29,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-27 05:34:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:29,704 INFO L225 Difference]: With dead ends: 2648 [2020-10-27 05:34:29,705 INFO L226 Difference]: Without dead ends: 1961 [2020-10-27 05:34:29,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:34:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2020-10-27 05:34:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1947. [2020-10-27 05:34:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1947 states. [2020-10-27 05:34:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2951 transitions. [2020-10-27 05:34:30,122 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2951 transitions. Word has length 111 [2020-10-27 05:34:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:30,122 INFO L481 AbstractCegarLoop]: Abstraction has 1947 states and 2951 transitions. [2020-10-27 05:34:30,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:34:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2951 transitions. [2020-10-27 05:34:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 05:34:30,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:30,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:30,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:34:30,124 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1207430756, now seen corresponding path program 1 times [2020-10-27 05:34:30,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:30,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839342997] [2020-10-27 05:34:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:30,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:30,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:30,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:30,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:30,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:30,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:31,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:31,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:35,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:35,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 05:34:35,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:34:35,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:34:35,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:34:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 05:34:35,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:35,569 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:34:35,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:35,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:35,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:35,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:35,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:35,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:34:35,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:35,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:35,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:35,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839342997] [2020-10-27 05:34:35,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:35,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:34:35,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762686479] [2020-10-27 05:34:35,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:34:35,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:34:35,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:34:35,630 INFO L87 Difference]: Start difference. First operand 1947 states and 2951 transitions. Second operand 7 states. [2020-10-27 05:34:36,017 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-27 05:34:37,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:37,663 INFO L93 Difference]: Finished difference Result 4511 states and 6982 transitions. [2020-10-27 05:34:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:34:37,664 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 111 [2020-10-27 05:34:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:37,671 INFO L225 Difference]: With dead ends: 4511 [2020-10-27 05:34:37,671 INFO L226 Difference]: Without dead ends: 3454 [2020-10-27 05:34:37,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:34:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2020-10-27 05:34:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 1895. [2020-10-27 05:34:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1895 states. [2020-10-27 05:34:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2879 transitions. [2020-10-27 05:34:38,080 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2879 transitions. Word has length 111 [2020-10-27 05:34:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:38,080 INFO L481 AbstractCegarLoop]: Abstraction has 1895 states and 2879 transitions. [2020-10-27 05:34:38,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:34:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2879 transitions. [2020-10-27 05:34:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 05:34:38,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:38,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:38,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:34:38,082 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:38,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:38,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1886070970, now seen corresponding path program 1 times [2020-10-27 05:34:38,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:38,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354106663] [2020-10-27 05:34:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:38,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:38,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:38,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:38,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:38,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:38,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:39,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:43,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:43,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 05:34:43,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:34:43,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:34:43,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:43,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:43,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 05:34:43,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:34:43,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:43,482 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:34:43,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:43,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:43,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:43,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:43,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:43,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:34:43,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:43,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:43,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:43,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:43,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:43,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354106663] [2020-10-27 05:34:43,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:43,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:34:43,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941370135] [2020-10-27 05:34:43,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:34:43,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:43,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:34:43,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:34:43,527 INFO L87 Difference]: Start difference. First operand 1895 states and 2879 transitions. Second operand 4 states. [2020-10-27 05:34:43,877 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:34:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:45,436 INFO L93 Difference]: Finished difference Result 5168 states and 7940 transitions. [2020-10-27 05:34:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:34:45,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-27 05:34:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:45,442 INFO L225 Difference]: With dead ends: 5168 [2020-10-27 05:34:45,442 INFO L226 Difference]: Without dead ends: 3390 [2020-10-27 05:34:45,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:34:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3390 states. [2020-10-27 05:34:46,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3390 to 3387. [2020-10-27 05:34:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3387 states. [2020-10-27 05:34:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 5172 transitions. [2020-10-27 05:34:46,105 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 5172 transitions. Word has length 111 [2020-10-27 05:34:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:46,106 INFO L481 AbstractCegarLoop]: Abstraction has 3387 states and 5172 transitions. [2020-10-27 05:34:46,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:34:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 5172 transitions. [2020-10-27 05:34:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 05:34:46,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:46,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:46,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:34:46,107 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:46,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1503727900, now seen corresponding path program 1 times [2020-10-27 05:34:46,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:46,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178836741] [2020-10-27 05:34:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:46,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:46,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:46,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:46,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:46,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:46,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:49,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:51,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:51,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 05:34:51,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:34:51,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:34:51,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:51,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:34:51,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:51,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 05:34:51,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:51,500 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:34:51,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:51,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:51,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:51,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:51,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:51,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:34:51,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:51,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:51,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178836741] [2020-10-27 05:34:51,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:51,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:34:51,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811093636] [2020-10-27 05:34:51,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:34:51,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:51,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:34:51,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:34:51,562 INFO L87 Difference]: Start difference. First operand 3387 states and 5172 transitions. Second operand 6 states. [2020-10-27 05:34:51,919 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:34:53,645 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:34:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:54,123 INFO L93 Difference]: Finished difference Result 9802 states and 15063 transitions. [2020-10-27 05:34:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:34:54,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2020-10-27 05:34:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:54,138 INFO L225 Difference]: With dead ends: 9802 [2020-10-27 05:34:54,138 INFO L226 Difference]: Without dead ends: 6526 [2020-10-27 05:34:54,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:34:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2020-10-27 05:34:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 6523. [2020-10-27 05:34:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6523 states. [2020-10-27 05:34:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 9993 transitions. [2020-10-27 05:34:55,736 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 9993 transitions. Word has length 112 [2020-10-27 05:34:55,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:55,736 INFO L481 AbstractCegarLoop]: Abstraction has 6523 states and 9993 transitions. [2020-10-27 05:34:55,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:34:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 9993 transitions. [2020-10-27 05:34:55,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 05:34:55,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:55,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:55,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:34:55,738 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:55,739 INFO L82 PathProgramCache]: Analyzing trace with hash 35234049, now seen corresponding path program 1 times [2020-10-27 05:34:55,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:55,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322306872] [2020-10-27 05:34:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:55,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:55,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:56,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:56,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:56,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:58,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:58,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 05:34:58,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:34:58,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2841 [2020-10-27 05:34:58,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 05:34:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:34:58,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:59,035 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:34:59,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:59,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:59,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:59,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:59,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:34:59,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:59,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322306872] [2020-10-27 05:34:59,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:59,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:34:59,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336113214] [2020-10-27 05:34:59,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:34:59,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:59,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:34:59,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:34:59,094 INFO L87 Difference]: Start difference. First operand 6523 states and 9993 transitions. Second operand 4 states. [2020-10-27 05:34:59,460 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:35:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:02,551 INFO L93 Difference]: Finished difference Result 18554 states and 28484 transitions. [2020-10-27 05:35:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:35:02,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-10-27 05:35:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:02,580 INFO L225 Difference]: With dead ends: 18554 [2020-10-27 05:35:02,580 INFO L226 Difference]: Without dead ends: 12166 [2020-10-27 05:35:02,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:35:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12166 states. [2020-10-27 05:35:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12166 to 12163. [2020-10-27 05:35:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12163 states. [2020-10-27 05:35:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12163 states to 12163 states and 18563 transitions. [2020-10-27 05:35:05,043 INFO L78 Accepts]: Start accepts. Automaton has 12163 states and 18563 transitions. Word has length 112 [2020-10-27 05:35:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:05,043 INFO L481 AbstractCegarLoop]: Abstraction has 12163 states and 18563 transitions. [2020-10-27 05:35:05,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:35:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 12163 states and 18563 transitions. [2020-10-27 05:35:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 05:35:05,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:05,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:05,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:35:05,045 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:05,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash -918994557, now seen corresponding path program 1 times [2020-10-27 05:35:05,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:05,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922374674] [2020-10-27 05:35:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:05,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:05,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:05,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:05,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:06,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:06,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 05:35:06,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:35:06,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1623 [2020-10-27 05:35:06,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 05:35:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:35:06,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:07,033 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:35:07,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:07,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:07,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:07,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:07,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:07,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:35:07,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:07,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:35:07,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:07,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:35:07,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:07,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922374674] [2020-10-27 05:35:07,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:07,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:35:07,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171108085] [2020-10-27 05:35:07,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:35:07,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:07,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:35:07,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:35:07,076 INFO L87 Difference]: Start difference. First operand 12163 states and 18563 transitions. Second operand 4 states. [2020-10-27 05:35:07,442 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:35:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:12,702 INFO L93 Difference]: Finished difference Result 34834 states and 53157 transitions. [2020-10-27 05:35:12,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:35:12,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-10-27 05:35:12,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:12,742 INFO L225 Difference]: With dead ends: 34834 [2020-10-27 05:35:12,743 INFO L226 Difference]: Without dead ends: 22824 [2020-10-27 05:35:12,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:35:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22824 states. [2020-10-27 05:35:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22824 to 22821. [2020-10-27 05:35:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22821 states. [2020-10-27 05:35:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22821 states to 22821 states and 34610 transitions. [2020-10-27 05:35:17,491 INFO L78 Accepts]: Start accepts. Automaton has 22821 states and 34610 transitions. Word has length 113 [2020-10-27 05:35:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:17,491 INFO L481 AbstractCegarLoop]: Abstraction has 22821 states and 34610 transitions. [2020-10-27 05:35:17,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:35:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 22821 states and 34610 transitions. [2020-10-27 05:35:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 05:35:17,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:17,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:17,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:35:17,493 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:17,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:17,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1006387281, now seen corresponding path program 1 times [2020-10-27 05:35:17,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:17,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211428834] [2020-10-27 05:35:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:17,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:17,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:17,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:17,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:18,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:21,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:21,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 05:35:21,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:35:21,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3457 [2020-10-27 05:35:21,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:21,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:35:21,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:21,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 05:35:21,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:21,395 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:35:21,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:21,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:21,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:21,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:21,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:21,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:35:21,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:21,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:21,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:21,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:21,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:21,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211428834] [2020-10-27 05:35:21,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:21,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:35:21,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742425731] [2020-10-27 05:35:21,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:35:21,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:21,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:35:21,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:35:21,455 INFO L87 Difference]: Start difference. First operand 22821 states and 34610 transitions. Second operand 6 states. [2020-10-27 05:35:21,828 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:35:25,746 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:35:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:31,684 INFO L93 Difference]: Finished difference Result 67946 states and 103082 transitions. [2020-10-27 05:35:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:35:31,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-27 05:35:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:31,749 INFO L225 Difference]: With dead ends: 67946 [2020-10-27 05:35:31,749 INFO L226 Difference]: Without dead ends: 45272 [2020-10-27 05:35:31,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:35:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45272 states. [2020-10-27 05:35:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45272 to 45269. [2020-10-27 05:35:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45269 states. [2020-10-27 05:35:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45269 states to 45269 states and 68479 transitions. [2020-10-27 05:35:41,324 INFO L78 Accepts]: Start accepts. Automaton has 45269 states and 68479 transitions. Word has length 114 [2020-10-27 05:35:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:41,325 INFO L481 AbstractCegarLoop]: Abstraction has 45269 states and 68479 transitions. [2020-10-27 05:35:41,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:35:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 45269 states and 68479 transitions. [2020-10-27 05:35:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 05:35:41,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:41,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:41,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:35:41,327 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1430158026, now seen corresponding path program 1 times [2020-10-27 05:35:41,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:41,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111579907] [2020-10-27 05:35:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:41,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:41,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:41,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:41,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:42,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:42,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 05:35:42,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:35:42,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-27 05:35:42,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:42,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:42,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 05:35:42,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:35:42,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:42,541 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 05:35:42,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:42,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:42,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:42,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:42,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:42,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:35:42,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:35:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:35:42,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:42,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111579907] [2020-10-27 05:35:42,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:42,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:35:42,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895170174] [2020-10-27 05:35:42,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:35:42,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:42,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:35:42,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:35:42,588 INFO L87 Difference]: Start difference. First operand 45269 states and 68479 transitions. Second operand 4 states. [2020-10-27 05:35:42,950 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 05:36:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:00,731 INFO L93 Difference]: Finished difference Result 130300 states and 196656 transitions. [2020-10-27 05:36:00,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:36:00,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2020-10-27 05:36:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:00,838 INFO L225 Difference]: With dead ends: 130300 [2020-10-27 05:36:00,839 INFO L226 Difference]: Without dead ends: 85202 [2020-10-27 05:36:00,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:36:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85202 states.