/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:51:00,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:51:00,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:51:00,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:51:00,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:51:00,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:51:00,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:51:00,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:51:00,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:51:00,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:51:00,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:51:00,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:51:00,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:51:00,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:51:00,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:51:00,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:51:00,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:51:00,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:51:00,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:51:00,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:51:00,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:51:00,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:51:00,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:51:00,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:51:00,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:51:00,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:51:00,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:51:00,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:51:00,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:51:00,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:51:00,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:51:00,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:51:00,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:51:00,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:51:00,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:51:00,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:51:00,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:51:00,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:51:00,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:51:00,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:51:00,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:51:00,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:51:00,788 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:51:00,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:51:00,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:51:00,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:51:00,794 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:51:00,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:51:00,795 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:51:00,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:51:00,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:51:00,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:51:00,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:51:00,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:51:00,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:51:00,797 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:51:00,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:51:00,798 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:51:00,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:51:00,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:51:00,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:51:00,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:51:00,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:51:00,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:51:00,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:51:00,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:51:00,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:51:00,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:51:00,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:51:00,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:51:00,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:51:00,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:51:01,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:51:01,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:51:01,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:51:01,257 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:51:01,258 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:51:01,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2020-10-28 08:51:01,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2315a60de/31e425caec6f483b95a4e8aba6c99139/FLAGf8bc69586 [2020-10-28 08:51:01,915 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:51:01,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2020-10-28 08:51:01,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2315a60de/31e425caec6f483b95a4e8aba6c99139/FLAGf8bc69586 [2020-10-28 08:51:02,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2315a60de/31e425caec6f483b95a4e8aba6c99139 [2020-10-28 08:51:02,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:51:02,313 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:51:02,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:02,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:51:02,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:51:02,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:02" (1/1) ... [2020-10-28 08:51:02,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e7a3526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02, skipping insertion in model container [2020-10-28 08:51:02,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:02" (1/1) ... [2020-10-28 08:51:02,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:51:02,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:51:02,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:02,663 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:51:02,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:02,745 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:51:02,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02 WrapperNode [2020-10-28 08:51:02,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:02,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:51:02,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:51:02,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:51:02,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02" (1/1) ... [2020-10-28 08:51:02,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02" (1/1) ... [2020-10-28 08:51:02,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02" (1/1) ... [2020-10-28 08:51:02,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02" (1/1) ... [2020-10-28 08:51:02,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02" (1/1) ... [2020-10-28 08:51:02,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02" (1/1) ... [2020-10-28 08:51:02,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02" (1/1) ... [2020-10-28 08:51:02,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:51:02,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:51:02,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:51:02,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:51:02,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:51:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:51:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:51:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:51:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:51:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:51:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:51:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:51:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:51:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:51:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:51:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:51:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:51:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:51:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:51:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:51:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:51:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:51:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:51:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:51:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:51:03,362 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:51:03,362 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-28 08:51:03,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:03 BoogieIcfgContainer [2020-10-28 08:51:03,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:51:03,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:51:03,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:51:03,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:51:03,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:51:02" (1/3) ... [2020-10-28 08:51:03,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf26539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:03, skipping insertion in model container [2020-10-28 08:51:03,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:02" (2/3) ... [2020-10-28 08:51:03,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf26539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:03, skipping insertion in model container [2020-10-28 08:51:03,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:03" (3/3) ... [2020-10-28 08:51:03,374 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2020-10-28 08:51:03,387 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:51:03,392 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:51:03,406 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:51:03,435 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:51:03,435 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:51:03,435 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:51:03,436 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:51:03,436 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:51:03,436 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:51:03,436 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:51:03,436 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:51:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-28 08:51:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 08:51:03,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:03,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:03,462 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:03,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1006986874, now seen corresponding path program 1 times [2020-10-28 08:51:03,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:03,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472029661] [2020-10-28 08:51:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:03,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 08:51:03,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:03,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-28 08:51:03,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:03,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:03,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:51:03,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:03,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 08:51:03,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:03,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:03,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:03,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 08:51:03,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:03,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:03,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:03,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:03,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:03,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:03,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472029661] [2020-10-28 08:51:03,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:03,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:51:03,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351255005] [2020-10-28 08:51:03,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:51:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:03,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:51:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:03,963 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-28 08:51:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:04,210 INFO L93 Difference]: Finished difference Result 89 states and 133 transitions. [2020-10-28 08:51:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:51:04,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 08:51:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:04,224 INFO L225 Difference]: With dead ends: 89 [2020-10-28 08:51:04,224 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:51:04,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:51:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:51:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:51:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-28 08:51:04,302 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2020-10-28 08:51:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:04,304 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-28 08:51:04,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:51:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-28 08:51:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 08:51:04,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:04,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:04,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:51:04,310 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1889588042, now seen corresponding path program 1 times [2020-10-28 08:51:04,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:04,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195414932] [2020-10-28 08:51:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:04,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:04,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 08:51:04,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:04,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-28 08:51:04,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:04,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:04,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:04,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:04,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:04,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:04,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:51:04,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:04,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:04,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:04,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:04,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:04,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:04,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195414932] [2020-10-28 08:51:04,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:04,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:04,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862037824] [2020-10-28 08:51:04,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:04,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:04,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:04,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:04,644 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2020-10-28 08:51:04,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:04,771 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-10-28 08:51:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:04,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 08:51:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:04,773 INFO L225 Difference]: With dead ends: 78 [2020-10-28 08:51:04,773 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 08:51:04,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 08:51:04,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-28 08:51:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 08:51:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-28 08:51:04,785 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 18 [2020-10-28 08:51:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:04,786 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-28 08:51:04,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-28 08:51:04,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 08:51:04,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:04,787 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] [2020-10-28 08:51:04,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:51:04,788 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:04,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:04,789 INFO L82 PathProgramCache]: Analyzing trace with hash -888776724, now seen corresponding path program 1 times [2020-10-28 08:51:04,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:04,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675946588] [2020-10-28 08:51:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:04,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 08:51:05,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:05,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-28 08:51:05,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:05,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:05,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:05,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:05,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:05,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:05,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:05,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675946588] [2020-10-28 08:51:05,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:05,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:05,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829694541] [2020-10-28 08:51:05,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:05,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:05,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:05,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:05,203 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 5 states. [2020-10-28 08:51:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:05,329 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-10-28 08:51:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:05,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 08:51:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:05,331 INFO L225 Difference]: With dead ends: 80 [2020-10-28 08:51:05,331 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:51:05,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:51:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-28 08:51:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 08:51:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-10-28 08:51:05,341 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 20 [2020-10-28 08:51:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:05,342 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-10-28 08:51:05,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-10-28 08:51:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 08:51:05,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:05,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:05,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:51:05,344 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash 572341262, now seen corresponding path program 2 times [2020-10-28 08:51:05,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:05,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141790855] [2020-10-28 08:51:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 08:51:05,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:05,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-28 08:51:05,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:05,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:05,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:05,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:05,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:05,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:05,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:51:05,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:05,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:05,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:05,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:05,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141790855] [2020-10-28 08:51:05,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:05,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:05,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374166336] [2020-10-28 08:51:05,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:05,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:05,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:05,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:05,660 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 4 states. [2020-10-28 08:51:05,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:05,806 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-10-28 08:51:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:05,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 08:51:05,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:05,808 INFO L225 Difference]: With dead ends: 78 [2020-10-28 08:51:05,808 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 08:51:05,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 08:51:05,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-28 08:51:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 08:51:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-28 08:51:05,820 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 22 [2020-10-28 08:51:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:05,820 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-28 08:51:05,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-28 08:51:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 08:51:05,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:05,821 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:05,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:51:05,822 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:05,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2075512815, now seen corresponding path program 1 times [2020-10-28 08:51:05,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:05,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105111654] [2020-10-28 08:51:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 08:51:06,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:06,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-28 08:51:06,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:06,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:06,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:06,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:06,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:06,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:06,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:51:06,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:06,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:06,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:06,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:06,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105111654] [2020-10-28 08:51:06,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:06,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:51:06,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259953663] [2020-10-28 08:51:06,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:06,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:06,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:06,605 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 5 states. [2020-10-28 08:51:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:06,776 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2020-10-28 08:51:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:06,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 08:51:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:06,778 INFO L225 Difference]: With dead ends: 91 [2020-10-28 08:51:06,778 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 08:51:06,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 08:51:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-28 08:51:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 08:51:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-10-28 08:51:06,788 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 24 [2020-10-28 08:51:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:06,788 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-10-28 08:51:06,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-10-28 08:51:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:51:06,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:06,790 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:06,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:51:06,790 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:06,791 INFO L82 PathProgramCache]: Analyzing trace with hash -724140627, now seen corresponding path program 1 times [2020-10-28 08:51:06,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:06,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444447865] [2020-10-28 08:51:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:08,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:51:08,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:51:08,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1441 [2020-10-28 08:51:08,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:08,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:08,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:08,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:08,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 08:51:08,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:08,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:08,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:08,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:08,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:08,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:08,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:08,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:08,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:08,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:08,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:08,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:08,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444447865] [2020-10-28 08:51:08,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:08,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:51:08,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470956586] [2020-10-28 08:51:08,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:08,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:08,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:08,301 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 5 states. [2020-10-28 08:51:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:08,452 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2020-10-28 08:51:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:08,453 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-28 08:51:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:08,454 INFO L225 Difference]: With dead ends: 97 [2020-10-28 08:51:08,454 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 08:51:08,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 08:51:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-28 08:51:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 08:51:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-10-28 08:51:08,463 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 25 [2020-10-28 08:51:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:08,463 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-28 08:51:08,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-10-28 08:51:08,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 08:51:08,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:08,465 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:08,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:51:08,465 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:08,466 INFO L82 PathProgramCache]: Analyzing trace with hash 955545094, now seen corresponding path program 1 times [2020-10-28 08:51:08,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:08,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193372283] [2020-10-28 08:51:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:08,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:11,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 08:51:11,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:11,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2699 [2020-10-28 08:51:11,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:11,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:11,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:11,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 08:51:11,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:11,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:11,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:11,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:11,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:11,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:11,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:51:11,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:11,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:11,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:11,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:11,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:11,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:11,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193372283] [2020-10-28 08:51:11,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:11,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:11,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759964635] [2020-10-28 08:51:11,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:11,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:11,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:11,270 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 7 states. [2020-10-28 08:51:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:11,701 INFO L93 Difference]: Finished difference Result 164 states and 224 transitions. [2020-10-28 08:51:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:51:11,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-28 08:51:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:11,703 INFO L225 Difference]: With dead ends: 164 [2020-10-28 08:51:11,703 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 08:51:11,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:11,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 08:51:11,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2020-10-28 08:51:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 08:51:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-10-28 08:51:11,720 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 28 [2020-10-28 08:51:11,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:11,720 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-10-28 08:51:11,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-10-28 08:51:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:51:11,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:11,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:11,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:51:11,722 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:11,723 INFO L82 PathProgramCache]: Analyzing trace with hash -191106291, now seen corresponding path program 2 times [2020-10-28 08:51:11,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:11,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187098997] [2020-10-28 08:51:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:11,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:15,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:51:15,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:15,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3292 [2020-10-28 08:51:15,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:15,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:15,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:15,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 08:51:15,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 08:51:15,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:15,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:15,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:15,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:15,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:15,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:15,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:15,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:15,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:15,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187098997] [2020-10-28 08:51:15,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:15,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:15,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941356970] [2020-10-28 08:51:15,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:15,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:15,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:15,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:15,120 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 8 states. [2020-10-28 08:51:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:15,619 INFO L93 Difference]: Finished difference Result 258 states and 361 transitions. [2020-10-28 08:51:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:51:15,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-28 08:51:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:15,622 INFO L225 Difference]: With dead ends: 258 [2020-10-28 08:51:15,622 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 08:51:15,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:51:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 08:51:15,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 85. [2020-10-28 08:51:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 08:51:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2020-10-28 08:51:15,637 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 31 [2020-10-28 08:51:15,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:15,638 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2020-10-28 08:51:15,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2020-10-28 08:51:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 08:51:15,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:15,639 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:15,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:51:15,640 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2087355558, now seen corresponding path program 3 times [2020-10-28 08:51:15,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:15,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323513772] [2020-10-28 08:51:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:15,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:19,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 08:51:19,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:19,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3821 [2020-10-28 08:51:19,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:19,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:19,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:19,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:19,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:51:19,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:19,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:19,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:19,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:19,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:19,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:19,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:19,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:19,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:19,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:19,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:19,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:19,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323513772] [2020-10-28 08:51:19,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:19,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:19,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895196920] [2020-10-28 08:51:19,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:19,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:19,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:19,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:19,551 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand 8 states. [2020-10-28 08:51:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:19,759 INFO L93 Difference]: Finished difference Result 158 states and 218 transitions. [2020-10-28 08:51:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:19,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 08:51:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:19,762 INFO L225 Difference]: With dead ends: 158 [2020-10-28 08:51:19,762 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 08:51:19,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 08:51:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2020-10-28 08:51:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 08:51:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2020-10-28 08:51:19,786 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 34 [2020-10-28 08:51:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:19,787 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2020-10-28 08:51:19,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2020-10-28 08:51:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 08:51:19,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:19,792 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:19,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:51:19,793 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:19,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2081153133, now seen corresponding path program 4 times [2020-10-28 08:51:19,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:19,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435228333] [2020-10-28 08:51:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:19,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:24,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 08:51:24,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:24,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4474 [2020-10-28 08:51:24,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:24,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:51:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:51:24,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:24,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:24,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:24,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:24,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:24,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:24,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:24,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:24,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:24,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:24,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:24,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 08:51:24,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435228333] [2020-10-28 08:51:24,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:24,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 08:51:24,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877781551] [2020-10-28 08:51:24,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:24,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:24,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:24,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:24,429 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand 7 states. [2020-10-28 08:51:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:24,650 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2020-10-28 08:51:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:24,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-28 08:51:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:24,652 INFO L225 Difference]: With dead ends: 106 [2020-10-28 08:51:24,652 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 08:51:24,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 08:51:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2020-10-28 08:51:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 08:51:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2020-10-28 08:51:24,664 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 37 [2020-10-28 08:51:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:24,664 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2020-10-28 08:51:24,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2020-10-28 08:51:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 08:51:24,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:24,666 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:24,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:51:24,666 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:24,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2207545, now seen corresponding path program 1 times [2020-10-28 08:51:24,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:24,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107249349] [2020-10-28 08:51:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:24,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:29,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:29,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 08:51:29,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:51:29,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:51:29,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:29,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:29,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:29,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:29,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:51:29,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:29,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:29,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:29,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:29,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:29,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 08:51:29,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:29,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:29,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 08:51:29,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107249349] [2020-10-28 08:51:29,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:29,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:29,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496533415] [2020-10-28 08:51:29,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:29,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:29,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:29,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:29,811 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand 5 states. [2020-10-28 08:51:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:30,006 INFO L93 Difference]: Finished difference Result 163 states and 226 transitions. [2020-10-28 08:51:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:30,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-28 08:51:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:30,014 INFO L225 Difference]: With dead ends: 163 [2020-10-28 08:51:30,014 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 08:51:30,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 08:51:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-10-28 08:51:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 08:51:30,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2020-10-28 08:51:30,036 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 42 [2020-10-28 08:51:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:30,037 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2020-10-28 08:51:30,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2020-10-28 08:51:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 08:51:30,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:30,040 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:30,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:51:30,040 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:30,041 INFO L82 PathProgramCache]: Analyzing trace with hash -218200964, now seen corresponding path program 1 times [2020-10-28 08:51:30,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:30,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787892057] [2020-10-28 08:51:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:30,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 08:51:35,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 08:51:35,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:51:35,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:51:35,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:35,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:35,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:35,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:35,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:35,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:35,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:35,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:35,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 08:51:35,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787892057] [2020-10-28 08:51:35,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:35,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:51:35,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60005988] [2020-10-28 08:51:35,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:35,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:35,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:35,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:35,129 INFO L87 Difference]: Start difference. First operand 105 states and 143 transitions. Second operand 5 states. [2020-10-28 08:51:35,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:35,344 INFO L93 Difference]: Finished difference Result 203 states and 279 transitions. [2020-10-28 08:51:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:35,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-10-28 08:51:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:35,346 INFO L225 Difference]: With dead ends: 203 [2020-10-28 08:51:35,347 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 08:51:35,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 08:51:35,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2020-10-28 08:51:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 08:51:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 146 transitions. [2020-10-28 08:51:35,364 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 146 transitions. Word has length 44 [2020-10-28 08:51:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:35,364 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 146 transitions. [2020-10-28 08:51:35,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 146 transitions. [2020-10-28 08:51:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:51:35,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:35,366 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:35,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:51:35,367 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:35,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:35,369 INFO L82 PathProgramCache]: Analyzing trace with hash 254207395, now seen corresponding path program 1 times [2020-10-28 08:51:35,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:35,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140123183] [2020-10-28 08:51:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:35,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:40,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:51:40,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:40,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 08:51:40,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:40,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:40,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:40,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:40,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:40,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:40,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:40,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:40,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:40,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:40,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:40,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:40,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:40,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:40,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:40,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 08:51:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:40,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:40,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:40,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:40,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:40,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:40,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:40,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:40,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:40,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:40,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 08:51:40,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140123183] [2020-10-28 08:51:40,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:40,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:40,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433079573] [2020-10-28 08:51:40,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:40,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:40,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:40,457 INFO L87 Difference]: Start difference. First operand 108 states and 146 transitions. Second operand 6 states. [2020-10-28 08:51:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:40,620 INFO L93 Difference]: Finished difference Result 208 states and 284 transitions. [2020-10-28 08:51:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:40,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 08:51:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:40,622 INFO L225 Difference]: With dead ends: 208 [2020-10-28 08:51:40,623 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 08:51:40,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 08:51:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-28 08:51:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 08:51:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 148 transitions. [2020-10-28 08:51:40,634 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 148 transitions. Word has length 45 [2020-10-28 08:51:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:40,634 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 148 transitions. [2020-10-28 08:51:40,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:40,634 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 148 transitions. [2020-10-28 08:51:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:51:40,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:40,635 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:40,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:51:40,635 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:40,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1984590911, now seen corresponding path program 2 times [2020-10-28 08:51:40,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:40,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210642129] [2020-10-28 08:51:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:40,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:45,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:51:45,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:45,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:51:45,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:45,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 08:51:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 08:51:45,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:45,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:45,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:45,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:45,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:45,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:45,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:45,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:45,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:45,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 08:51:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:45,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:45,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:45,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:45,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:45,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:45,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:45,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:45,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:45,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:45,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 08:51:45,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210642129] [2020-10-28 08:51:45,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:45,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:45,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234580679] [2020-10-28 08:51:45,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:45,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:45,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:45,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:45,778 INFO L87 Difference]: Start difference. First operand 110 states and 148 transitions. Second operand 10 states. [2020-10-28 08:51:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:46,788 INFO L93 Difference]: Finished difference Result 428 states and 609 transitions. [2020-10-28 08:51:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:51:46,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-28 08:51:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:46,795 INFO L225 Difference]: With dead ends: 428 [2020-10-28 08:51:46,799 INFO L226 Difference]: Without dead ends: 346 [2020-10-28 08:51:46,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:51:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-28 08:51:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 119. [2020-10-28 08:51:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 08:51:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 162 transitions. [2020-10-28 08:51:46,826 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 162 transitions. Word has length 47 [2020-10-28 08:51:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:46,826 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 162 transitions. [2020-10-28 08:51:46,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 162 transitions. [2020-10-28 08:51:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 08:51:46,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:46,827 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:46,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:51:46,828 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:46,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:46,828 INFO L82 PathProgramCache]: Analyzing trace with hash -268733282, now seen corresponding path program 3 times [2020-10-28 08:51:46,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:46,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724330111] [2020-10-28 08:51:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:46,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:51,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 08:51:51,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:51,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:51:51,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:51,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:51,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:51,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:51,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:51:51,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:51,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:51,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:51,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:51,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:51,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:51,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:51,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:51,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:51,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:51,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:51,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:51,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 08:51:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:51,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:51,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:51,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:51,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:51,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:51,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:51,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:51,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:51,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:51,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 08:51:51,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724330111] [2020-10-28 08:51:51,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:51,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:51,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298401955] [2020-10-28 08:51:51,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:51,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:51,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:51,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:51,949 INFO L87 Difference]: Start difference. First operand 119 states and 162 transitions. Second operand 10 states. [2020-10-28 08:51:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:52,214 INFO L93 Difference]: Finished difference Result 212 states and 294 transitions. [2020-10-28 08:51:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:51:52,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-28 08:51:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:52,219 INFO L225 Difference]: With dead ends: 212 [2020-10-28 08:51:52,219 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 08:51:52,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:51:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 08:51:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-28 08:51:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 08:51:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 166 transitions. [2020-10-28 08:51:52,233 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 166 transitions. Word has length 50 [2020-10-28 08:51:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:52,233 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 166 transitions. [2020-10-28 08:51:52,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 166 transitions. [2020-10-28 08:51:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:51:52,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:52,234 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:52,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:51:52,235 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1854864735, now seen corresponding path program 4 times [2020-10-28 08:51:52,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:52,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457961238] [2020-10-28 08:51:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:52,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:53,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:57,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:51:57,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:57,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:51:57,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:57,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:57,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:57,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:57,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:57,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:57,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:57,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:57,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:57,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:57,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:57,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:57,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:57,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:57,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:57,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:57,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:57,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 08:51:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:57,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:57,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:57,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:57,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:57,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:57,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:57,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-28 08:51:57,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457961238] [2020-10-28 08:51:57,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:57,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:57,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854927002] [2020-10-28 08:51:57,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:57,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:57,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:57,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:57,332 INFO L87 Difference]: Start difference. First operand 122 states and 166 transitions. Second operand 7 states. [2020-10-28 08:51:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:57,485 INFO L93 Difference]: Finished difference Result 234 states and 322 transitions. [2020-10-28 08:51:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:57,486 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-28 08:51:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:57,487 INFO L225 Difference]: With dead ends: 234 [2020-10-28 08:51:57,487 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 08:51:57,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:57,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 08:51:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-28 08:51:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 08:51:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 168 transitions. [2020-10-28 08:51:57,500 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 168 transitions. Word has length 53 [2020-10-28 08:51:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:57,500 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 168 transitions. [2020-10-28 08:51:57,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 168 transitions. [2020-10-28 08:51:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:51:57,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:57,501 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:57,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:51:57,502 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:57,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:57,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1576970943, now seen corresponding path program 5 times [2020-10-28 08:51:57,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:57,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871952715] [2020-10-28 08:51:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:57,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:58,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:02,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 08:52:02,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:02,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:52:02,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:02,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:02,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:52:02,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:52:02,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 08:52:02,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:02,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:02,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:02,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:02,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:02,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:02,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:02,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:02,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:02,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:02,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:02,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 08:52:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:02,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:02,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:02,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:02,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:02,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:02,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:02,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 08:52:02,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871952715] [2020-10-28 08:52:02,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:02,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:52:02,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292887434] [2020-10-28 08:52:02,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:52:02,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:02,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:52:02,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:02,652 INFO L87 Difference]: Start difference. First operand 124 states and 168 transitions. Second operand 11 states. [2020-10-28 08:52:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:03,104 INFO L93 Difference]: Finished difference Result 217 states and 300 transitions. [2020-10-28 08:52:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:52:03,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-28 08:52:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:03,108 INFO L225 Difference]: With dead ends: 217 [2020-10-28 08:52:03,108 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 08:52:03,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:52:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 08:52:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-28 08:52:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 08:52:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 172 transitions. [2020-10-28 08:52:03,136 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 172 transitions. Word has length 55 [2020-10-28 08:52:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:03,136 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 172 transitions. [2020-10-28 08:52:03,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:52:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 172 transitions. [2020-10-28 08:52:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 08:52:03,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:03,137 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:03,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:52:03,138 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:03,139 INFO L82 PathProgramCache]: Analyzing trace with hash -651621152, now seen corresponding path program 6 times [2020-10-28 08:52:03,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:03,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613146865] [2020-10-28 08:52:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:03,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:04,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:08,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 08:52:08,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:08,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:52:08,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:08,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:52:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:52:08,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:08,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:08,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:08,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:08,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:08,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:08,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:08,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:08,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:08,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:08,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:08,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:08,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 08:52:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:08,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:08,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:08,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:08,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:08,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:08,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:08,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 08:52:08,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613146865] [2020-10-28 08:52:08,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:08,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:52:08,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781836812] [2020-10-28 08:52:08,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:52:08,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:08,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:52:08,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:52:08,255 INFO L87 Difference]: Start difference. First operand 127 states and 172 transitions. Second operand 8 states. [2020-10-28 08:52:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:08,449 INFO L93 Difference]: Finished difference Result 242 states and 332 transitions. [2020-10-28 08:52:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:52:08,450 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 08:52:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:08,452 INFO L225 Difference]: With dead ends: 242 [2020-10-28 08:52:08,452 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 08:52:08,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:52:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 08:52:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-28 08:52:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 08:52:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2020-10-28 08:52:08,471 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 58 [2020-10-28 08:52:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:08,471 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2020-10-28 08:52:08,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:52:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2020-10-28 08:52:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 08:52:08,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:08,473 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:08,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:52:08,473 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:08,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1105868926, now seen corresponding path program 7 times [2020-10-28 08:52:08,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:08,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296169704] [2020-10-28 08:52:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:08,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:10,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:13,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 08:52:13,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:13,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:52:13,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:13,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:13,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:52:13,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 08:52:13,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:52:13,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:13,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:13,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:13,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:13,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:13,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:13,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:13,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:13,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:13,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 08:52:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:13,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:13,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:13,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:13,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:13,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:13,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:13,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:13,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:13,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:13,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 08:52:13,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296169704] [2020-10-28 08:52:13,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:13,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:52:13,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468596708] [2020-10-28 08:52:13,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:52:13,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:52:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:13,684 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand 13 states. [2020-10-28 08:52:15,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:15,241 INFO L93 Difference]: Finished difference Result 605 states and 868 transitions. [2020-10-28 08:52:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:52:15,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-28 08:52:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:15,253 INFO L225 Difference]: With dead ends: 605 [2020-10-28 08:52:15,253 INFO L226 Difference]: Without dead ends: 517 [2020-10-28 08:52:15,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:52:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-28 08:52:15,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 141. [2020-10-28 08:52:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 08:52:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2020-10-28 08:52:15,299 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 60 [2020-10-28 08:52:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:15,299 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2020-10-28 08:52:15,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:52:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2020-10-28 08:52:15,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:52:15,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:15,307 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:15,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:52:15,308 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:15,308 INFO L82 PathProgramCache]: Analyzing trace with hash -87747267, now seen corresponding path program 8 times [2020-10-28 08:52:15,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:15,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276697684] [2020-10-28 08:52:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:15,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:15,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:15,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:20,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:52:20,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:20,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:52:20,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:20,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:20,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:52:20,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:52:20,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 08:52:20,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:20,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:20,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:20,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:20,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:20,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:20,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:20,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:20,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:20,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 08:52:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:20,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:20,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:20,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:20,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:52:20,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:20,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:20,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:20,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:20,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:20,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 08:52:20,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276697684] [2020-10-28 08:52:20,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:20,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:52:20,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641533950] [2020-10-28 08:52:20,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:52:20,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:20,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:52:20,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:20,505 INFO L87 Difference]: Start difference. First operand 141 states and 193 transitions. Second operand 13 states. [2020-10-28 08:52:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:20,979 INFO L93 Difference]: Finished difference Result 243 states and 340 transitions. [2020-10-28 08:52:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:52:20,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-10-28 08:52:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:20,982 INFO L225 Difference]: With dead ends: 243 [2020-10-28 08:52:20,982 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 08:52:20,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:52:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 08:52:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-10-28 08:52:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 08:52:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 197 transitions. [2020-10-28 08:52:20,997 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 197 transitions. Word has length 63 [2020-10-28 08:52:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:20,997 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 197 transitions. [2020-10-28 08:52:20,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:52:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 197 transitions. [2020-10-28 08:52:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 08:52:20,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:20,998 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:20,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:52:20,999 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash -284448350, now seen corresponding path program 9 times [2020-10-28 08:52:20,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:20,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381222213] [2020-10-28 08:52:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:21,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:21,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:21,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:23,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:26,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 08:52:26,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:52:26,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:26,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:52:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:52:26,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:26,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:26,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:26,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:26,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:26,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:26,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:26,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:26,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:26,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:26,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:26,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 08:52:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:26,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:26,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:26,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:26,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:26,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:26,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-28 08:52:26,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381222213] [2020-10-28 08:52:26,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:26,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:52:26,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518095789] [2020-10-28 08:52:26,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:52:26,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:52:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:52:26,116 INFO L87 Difference]: Start difference. First operand 144 states and 197 transitions. Second operand 9 states. [2020-10-28 08:52:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:26,301 INFO L93 Difference]: Finished difference Result 274 states and 380 transitions. [2020-10-28 08:52:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:52:26,302 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-10-28 08:52:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:26,303 INFO L225 Difference]: With dead ends: 274 [2020-10-28 08:52:26,303 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 08:52:26,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:52:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 08:52:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-28 08:52:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-28 08:52:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2020-10-28 08:52:26,325 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 66 [2020-10-28 08:52:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:26,326 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2020-10-28 08:52:26,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:52:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2020-10-28 08:52:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 08:52:26,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:26,327 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:26,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:52:26,327 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1276337596, now seen corresponding path program 10 times [2020-10-28 08:52:26,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:26,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599204984] [2020-10-28 08:52:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:26,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:29,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:31,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 08:52:31,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:31,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:52:31,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:31,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:31,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:52:31,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:52:31,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:52:31,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:31,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:31,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:31,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:31,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:31,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:31,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:31,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:31,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:31,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 08:52:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:31,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:31,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:31,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:31,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:31,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:31,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:31,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-28 08:52:31,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599204984] [2020-10-28 08:52:31,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:31,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:52:31,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548268037] [2020-10-28 08:52:31,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:52:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:52:31,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:31,541 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand 14 states. [2020-10-28 08:52:32,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:32,018 INFO L93 Difference]: Finished difference Result 248 states and 346 transitions. [2020-10-28 08:52:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:52:32,020 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-28 08:52:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:32,021 INFO L225 Difference]: With dead ends: 248 [2020-10-28 08:52:32,021 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 08:52:32,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:52:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 08:52:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-10-28 08:52:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 08:52:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 203 transitions. [2020-10-28 08:52:32,036 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 203 transitions. Word has length 68 [2020-10-28 08:52:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:32,036 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 203 transitions. [2020-10-28 08:52:32,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:52:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 203 transitions. [2020-10-28 08:52:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:52:32,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:32,038 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:32,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:52:32,038 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:32,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1868551365, now seen corresponding path program 11 times [2020-10-28 08:52:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:32,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502119837] [2020-10-28 08:52:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:32,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:32,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:32,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:36,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:37,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:37,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:37,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:37,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:37,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:37,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:37,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:37,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:37,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:37,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:37,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:37,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 08:52:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:37,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:37,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:37,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:37,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:37,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:37,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:37,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:37,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:37,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:37,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 08:52:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502119837] [2020-10-28 08:52:37,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:37,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:52:37,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863900211] [2020-10-28 08:52:37,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:52:37,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:37,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:52:37,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:37,155 INFO L87 Difference]: Start difference. First operand 149 states and 203 transitions. Second operand 10 states. [2020-10-28 08:52:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:37,329 INFO L93 Difference]: Finished difference Result 282 states and 390 transitions. [2020-10-28 08:52:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:52:37,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-28 08:52:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:37,331 INFO L225 Difference]: With dead ends: 282 [2020-10-28 08:52:37,331 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 08:52:37,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:37,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 08:52:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-28 08:52:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-28 08:52:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 205 transitions. [2020-10-28 08:52:37,347 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 205 transitions. Word has length 71 [2020-10-28 08:52:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:37,347 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 205 transitions. [2020-10-28 08:52:37,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:52:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 205 transitions. [2020-10-28 08:52:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 08:52:37,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:37,348 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:37,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:52:37,348 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:37,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:37,349 INFO L82 PathProgramCache]: Analyzing trace with hash 504055769, now seen corresponding path program 12 times [2020-10-28 08:52:37,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:37,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110962330] [2020-10-28 08:52:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:37,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:42,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:52:42,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:42,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:52:42,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:42,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:42,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:52:42,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 08:52:42,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 08:52:42,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:42,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:42,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:42,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:42,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:42,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:42,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:42,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:42,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:42,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 08:52:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:42,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:42,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:42,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:42,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:42,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:42,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:42,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:42,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:42,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:42,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 08:52:42,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110962330] [2020-10-28 08:52:42,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:42,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:52:42,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633494590] [2020-10-28 08:52:42,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:52:42,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:52:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:42,603 INFO L87 Difference]: Start difference. First operand 151 states and 205 transitions. Second operand 16 states. [2020-10-28 08:52:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:44,643 INFO L93 Difference]: Finished difference Result 762 states and 1097 transitions. [2020-10-28 08:52:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 08:52:44,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-28 08:52:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:44,650 INFO L225 Difference]: With dead ends: 762 [2020-10-28 08:52:44,650 INFO L226 Difference]: Without dead ends: 665 [2020-10-28 08:52:44,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 08:52:44,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2020-10-28 08:52:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 163. [2020-10-28 08:52:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-28 08:52:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 224 transitions. [2020-10-28 08:52:44,686 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 224 transitions. Word has length 73 [2020-10-28 08:52:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:44,686 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 224 transitions. [2020-10-28 08:52:44,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:52:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 224 transitions. [2020-10-28 08:52:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 08:52:44,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:44,687 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:44,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:52:44,689 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:44,690 INFO L82 PathProgramCache]: Analyzing trace with hash -720952954, now seen corresponding path program 13 times [2020-10-28 08:52:44,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:44,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949255612] [2020-10-28 08:52:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:44,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:49,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 08:52:49,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:49,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5176 [2020-10-28 08:52:49,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:49,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:49,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:52:49,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:52:49,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:52:49,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:50,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:50,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:50,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:50,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:50,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:50,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:50,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:50,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:50,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:50,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:50,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:50,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:50,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 08:52:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:50,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:50,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:50,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:50,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:50,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:50,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:50,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:50,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 08:52:50,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949255612] [2020-10-28 08:52:50,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:50,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:52:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943557832] [2020-10-28 08:52:50,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:52:50,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:52:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:50,103 INFO L87 Difference]: Start difference. First operand 163 states and 224 transitions. Second operand 16 states. [2020-10-28 08:52:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:50,622 INFO L93 Difference]: Finished difference Result 274 states and 386 transitions. [2020-10-28 08:52:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:52:50,623 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 76 [2020-10-28 08:52:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:50,624 INFO L225 Difference]: With dead ends: 274 [2020-10-28 08:52:50,624 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 08:52:50,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:52:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 08:52:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-10-28 08:52:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 08:52:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 228 transitions. [2020-10-28 08:52:50,638 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 228 transitions. Word has length 76 [2020-10-28 08:52:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:50,638 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 228 transitions. [2020-10-28 08:52:50,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:52:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 228 transitions. [2020-10-28 08:52:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:52:50,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:50,639 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:50,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:52:50,640 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash -618705735, now seen corresponding path program 14 times [2020-10-28 08:52:50,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:50,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538783088] [2020-10-28 08:52:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:50,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:50,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:50,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:55,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:52:55,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:55,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-28 08:52:55,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:55,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:55,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:52:55,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:55,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:52:55,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:55,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:55,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:55,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:55,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:55,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:55,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:55,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:55,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:55,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:55,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 08:52:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:55,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:55,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:55,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:55,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:52:55,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:55,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:55,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:55,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:55,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:55,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-10-28 08:52:55,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538783088] [2020-10-28 08:52:55,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:55,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:52:55,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802113217] [2020-10-28 08:52:55,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:52:55,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:55,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:52:55,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:55,860 INFO L87 Difference]: Start difference. First operand 166 states and 228 transitions. Second operand 11 states. [2020-10-28 08:52:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:56,023 INFO L93 Difference]: Finished difference Result 314 states and 438 transitions. [2020-10-28 08:52:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:52:56,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-10-28 08:52:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:56,025 INFO L225 Difference]: With dead ends: 314 [2020-10-28 08:52:56,025 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 08:52:56,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 08:52:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-10-28 08:52:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 08:52:56,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 230 transitions. [2020-10-28 08:52:56,041 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 230 transitions. Word has length 79 [2020-10-28 08:52:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:56,041 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 230 transitions. [2020-10-28 08:52:56,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:52:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 230 transitions. [2020-10-28 08:52:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:52:56,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:56,042 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:56,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:52:56,043 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash -873796777, now seen corresponding path program 15 times [2020-10-28 08:52:56,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:56,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502775383] [2020-10-28 08:52:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:56,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:56,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:56,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:01,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:53:01,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:01,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:53:01,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:01,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:01,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:53:01,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 08:53:01,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 08:53:01,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:01,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:01,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:01,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:01,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:01,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:01,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:01,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:01,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:01,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:01,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:01,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:01,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 08:53:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:01,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:01,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:01,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:01,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:01,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 08:53:01,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502775383] [2020-10-28 08:53:01,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:01,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:53:01,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318093557] [2020-10-28 08:53:01,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:53:01,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:01,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:53:01,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:53:01,350 INFO L87 Difference]: Start difference. First operand 168 states and 230 transitions. Second operand 18 states. [2020-10-28 08:53:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:03,840 INFO L93 Difference]: Finished difference Result 846 states and 1219 transitions. [2020-10-28 08:53:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 08:53:03,840 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-28 08:53:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:03,846 INFO L225 Difference]: With dead ends: 846 [2020-10-28 08:53:03,847 INFO L226 Difference]: Without dead ends: 740 [2020-10-28 08:53:03,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=648, Invalid=1332, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 08:53:03,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2020-10-28 08:53:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 177. [2020-10-28 08:53:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-28 08:53:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 244 transitions. [2020-10-28 08:53:03,918 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 244 transitions. Word has length 81 [2020-10-28 08:53:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:03,918 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 244 transitions. [2020-10-28 08:53:03,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:53:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 244 transitions. [2020-10-28 08:53:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 08:53:03,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:03,920 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:03,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:53:03,920 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:03,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:03,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1323702968, now seen corresponding path program 16 times [2020-10-28 08:53:03,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:03,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179260189] [2020-10-28 08:53:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:03,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:03,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:04,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:08,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:08,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 08:53:08,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:08,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:53:08,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:08,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:08,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:53:08,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:53:08,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:53:08,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:09,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:09,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:09,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:09,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:09,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:09,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:09,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:09,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:09,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-28 08:53:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:09,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:09,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:09,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:09,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:09,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:09,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:09,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:09,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 2 proven. 247 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 08:53:09,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179260189] [2020-10-28 08:53:09,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:09,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:53:09,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569738376] [2020-10-28 08:53:09,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:53:09,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:09,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:53:09,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:53:09,219 INFO L87 Difference]: Start difference. First operand 177 states and 244 transitions. Second operand 18 states. [2020-10-28 08:53:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:09,783 INFO L93 Difference]: Finished difference Result 294 states and 416 transitions. [2020-10-28 08:53:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:53:09,786 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2020-10-28 08:53:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:09,787 INFO L225 Difference]: With dead ends: 294 [2020-10-28 08:53:09,787 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 08:53:09,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:53:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 08:53:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2020-10-28 08:53:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 08:53:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 248 transitions. [2020-10-28 08:53:09,805 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 248 transitions. Word has length 84 [2020-10-28 08:53:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:09,805 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 248 transitions. [2020-10-28 08:53:09,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:53:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 248 transitions. [2020-10-28 08:53:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 08:53:09,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:09,806 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:09,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:53:09,806 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:09,808 INFO L82 PathProgramCache]: Analyzing trace with hash 113891767, now seen corresponding path program 17 times [2020-10-28 08:53:09,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:09,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738148173] [2020-10-28 08:53:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:09,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:09,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:09,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:14,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:14,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 08:53:14,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:14,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 08:53:14,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:14,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:14,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:53:14,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:14,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:53:14,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:14,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:14,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:14,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:14,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:14,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:14,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:14,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:14,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:14,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:14,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:14,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:14,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:14,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 08:53:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:14,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:14,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:14,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:14,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:14,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:14,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:14,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:14,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:14,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:14,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:14,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 08:53:14,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738148173] [2020-10-28 08:53:14,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:14,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:53:14,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472061575] [2020-10-28 08:53:14,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:53:14,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:14,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:53:14,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:53:14,976 INFO L87 Difference]: Start difference. First operand 180 states and 248 transitions. Second operand 12 states. [2020-10-28 08:53:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:15,164 INFO L93 Difference]: Finished difference Result 340 states and 476 transitions. [2020-10-28 08:53:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:53:15,167 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-10-28 08:53:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:15,169 INFO L225 Difference]: With dead ends: 340 [2020-10-28 08:53:15,169 INFO L226 Difference]: Without dead ends: 183 [2020-10-28 08:53:15,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:53:15,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-28 08:53:15,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2020-10-28 08:53:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-28 08:53:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2020-10-28 08:53:15,187 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 87 [2020-10-28 08:53:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:15,187 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2020-10-28 08:53:15,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:53:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2020-10-28 08:53:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 08:53:15,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:15,188 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:15,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:53:15,188 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:15,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1152124331, now seen corresponding path program 18 times [2020-10-28 08:53:15,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:15,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171104501] [2020-10-28 08:53:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:15,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:15,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:15,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:20,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:20,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:53:20,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:20,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:53:20,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:20,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:20,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:53:20,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 08:53:20,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 08:53:20,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:20,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:20,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:20,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:20,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:20,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:20,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:20,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:20,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:20,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:20,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 08:53:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:20,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:20,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:20,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:20,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:20,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:20,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:20,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:20,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:20,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 2 proven. 287 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-28 08:53:20,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171104501] [2020-10-28 08:53:20,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:20,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:53:20,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363223064] [2020-10-28 08:53:20,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:53:20,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:20,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:53:20,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:53:20,506 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand 19 states. [2020-10-28 08:53:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:21,180 INFO L93 Difference]: Finished difference Result 299 states and 422 transitions. [2020-10-28 08:53:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:53:21,181 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-10-28 08:53:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:21,183 INFO L225 Difference]: With dead ends: 299 [2020-10-28 08:53:21,183 INFO L226 Difference]: Without dead ends: 187 [2020-10-28 08:53:21,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:53:21,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-28 08:53:21,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2020-10-28 08:53:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-28 08:53:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 254 transitions. [2020-10-28 08:53:21,201 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 254 transitions. Word has length 89 [2020-10-28 08:53:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:21,201 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 254 transitions. [2020-10-28 08:53:21,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:53:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 254 transitions. [2020-10-28 08:53:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 08:53:21,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:21,203 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:21,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:53:21,203 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:21,204 INFO L82 PathProgramCache]: Analyzing trace with hash 601984394, now seen corresponding path program 19 times [2020-10-28 08:53:21,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:21,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041702084] [2020-10-28 08:53:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:21,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:21,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:21,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:26,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:26,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 08:53:26,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:26,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 08:53:26,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:26,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:53:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:53:26,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:26,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:26,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:26,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:26,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:26,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:26,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:26,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:26,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:26,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:26,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-28 08:53:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:26,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:26,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:26,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:26,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:26,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:26,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:26,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:26,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:26,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:26,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:26,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-10-28 08:53:26,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041702084] [2020-10-28 08:53:26,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:26,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:53:26,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575717594] [2020-10-28 08:53:26,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:53:26,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:26,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:53:26,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:26,391 INFO L87 Difference]: Start difference. First operand 185 states and 254 transitions. Second operand 13 states. [2020-10-28 08:53:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:26,568 INFO L93 Difference]: Finished difference Result 348 states and 486 transitions. [2020-10-28 08:53:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:53:26,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 92 [2020-10-28 08:53:26,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:26,570 INFO L225 Difference]: With dead ends: 348 [2020-10-28 08:53:26,570 INFO L226 Difference]: Without dead ends: 188 [2020-10-28 08:53:26,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-28 08:53:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-10-28 08:53:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-28 08:53:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 256 transitions. [2020-10-28 08:53:26,587 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 256 transitions. Word has length 92 [2020-10-28 08:53:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:26,587 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 256 transitions. [2020-10-28 08:53:26,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:53:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 256 transitions. [2020-10-28 08:53:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 08:53:26,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:26,589 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:26,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:53:26,589 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1581850540, now seen corresponding path program 20 times [2020-10-28 08:53:26,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:26,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068584258] [2020-10-28 08:53:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:26,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:26,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:26,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:31,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 08:53:31,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:31,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:53:31,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:31,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:53:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 08:53:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:53:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:31,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:31,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:31,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:31,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:31,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:31,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:31,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:31,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:31,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-28 08:53:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:31,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:31,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:31,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:31,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:31,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:31,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:31,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 2 proven. 330 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-28 08:53:31,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068584258] [2020-10-28 08:53:31,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:31,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:53:31,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376835093] [2020-10-28 08:53:31,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:53:31,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:31,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:53:31,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:53:31,973 INFO L87 Difference]: Start difference. First operand 187 states and 256 transitions. Second operand 21 states. [2020-10-28 08:53:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:34,991 INFO L93 Difference]: Finished difference Result 1023 states and 1478 transitions. [2020-10-28 08:53:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 08:53:34,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2020-10-28 08:53:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:34,998 INFO L225 Difference]: With dead ends: 1023 [2020-10-28 08:53:34,998 INFO L226 Difference]: Without dead ends: 911 [2020-10-28 08:53:35,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=939, Invalid=1923, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 08:53:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2020-10-28 08:53:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 199. [2020-10-28 08:53:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-28 08:53:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 275 transitions. [2020-10-28 08:53:35,035 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 275 transitions. Word has length 94 [2020-10-28 08:53:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:35,035 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 275 transitions. [2020-10-28 08:53:35,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:53:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 275 transitions. [2020-10-28 08:53:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 08:53:35,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:35,036 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:35,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:53:35,037 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:35,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1312434989, now seen corresponding path program 21 times [2020-10-28 08:53:35,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:35,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681243169] [2020-10-28 08:53:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:35,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:35,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:35,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:40,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:40,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:53:40,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:40,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:53:40,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:40,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:40,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:53:40,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:53:40,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 08:53:40,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:40,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:40,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:40,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:40,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:40,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:40,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:40,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:40,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:40,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:40,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:40,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:40,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:40,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 08:53:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:40,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:40,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:40,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:40,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:40,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:40,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:40,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:40,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:40,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:40,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:40,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 2 proven. 376 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-28 08:53:40,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681243169] [2020-10-28 08:53:40,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:40,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:53:40,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027931081] [2020-10-28 08:53:40,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:53:40,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:40,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:53:40,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:53:40,405 INFO L87 Difference]: Start difference. First operand 199 states and 275 transitions. Second operand 21 states. [2020-10-28 08:53:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:41,065 INFO L93 Difference]: Finished difference Result 325 states and 462 transitions. [2020-10-28 08:53:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:53:41,067 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-10-28 08:53:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:41,069 INFO L225 Difference]: With dead ends: 325 [2020-10-28 08:53:41,069 INFO L226 Difference]: Without dead ends: 204 [2020-10-28 08:53:41,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 08:53:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-28 08:53:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-28 08:53:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-28 08:53:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 279 transitions. [2020-10-28 08:53:41,100 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 279 transitions. Word has length 97 [2020-10-28 08:53:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:41,101 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 279 transitions. [2020-10-28 08:53:41,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:53:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 279 transitions. [2020-10-28 08:53:41,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 08:53:41,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:41,102 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:41,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:53:41,102 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:41,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:41,103 INFO L82 PathProgramCache]: Analyzing trace with hash 790805068, now seen corresponding path program 22 times [2020-10-28 08:53:41,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:41,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721807348] [2020-10-28 08:53:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:41,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:41,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:41,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:46,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:46,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 08:53:46,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:46,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 08:53:46,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:46,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:46,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:53:46,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:46,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:53:46,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:46,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:46,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:46,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:46,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:46,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:46,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:46,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:46,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:46,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:46,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:46,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:46,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:46,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-28 08:53:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:46,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:46,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:46,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:46,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:46,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:46,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:46,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:46,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:46,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:46,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:46,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-10-28 08:53:46,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721807348] [2020-10-28 08:53:46,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:46,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:53:46,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834149430] [2020-10-28 08:53:46,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:53:46,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:46,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:53:46,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:46,335 INFO L87 Difference]: Start difference. First operand 202 states and 279 transitions. Second operand 14 states. [2020-10-28 08:53:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:46,516 INFO L93 Difference]: Finished difference Result 380 states and 534 transitions. [2020-10-28 08:53:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:53:46,516 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 100 [2020-10-28 08:53:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:46,518 INFO L225 Difference]: With dead ends: 380 [2020-10-28 08:53:46,518 INFO L226 Difference]: Without dead ends: 205 [2020-10-28 08:53:46,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-28 08:53:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-10-28 08:53:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 08:53:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 281 transitions. [2020-10-28 08:53:46,539 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 281 transitions. Word has length 100 [2020-10-28 08:53:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:46,540 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 281 transitions. [2020-10-28 08:53:46,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:53:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 281 transitions. [2020-10-28 08:53:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 08:53:46,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:46,541 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:46,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:53:46,541 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:46,542 INFO L82 PathProgramCache]: Analyzing trace with hash -890303890, now seen corresponding path program 23 times [2020-10-28 08:53:46,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:46,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072865754] [2020-10-28 08:53:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:46,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:46,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:46,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:51,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:51,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 08:53:51,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:51,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:53:51,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:51,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:53:51,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:53:51,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:53:51,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:51,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:51,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:51,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:51,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:51,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:51,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:51,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:51,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:51,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:51,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-28 08:53:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:51,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:51,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:51,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:51,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:51,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:51,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:51,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:51,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 2 proven. 425 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-28 08:53:51,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072865754] [2020-10-28 08:53:51,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:51,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:53:51,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451331417] [2020-10-28 08:53:51,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:53:51,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:51,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:53:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:53:51,939 INFO L87 Difference]: Start difference. First operand 204 states and 281 transitions. Second operand 22 states. [2020-10-28 08:53:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:52,760 INFO L93 Difference]: Finished difference Result 330 states and 468 transitions. [2020-10-28 08:53:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:53:52,761 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2020-10-28 08:53:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:52,762 INFO L225 Difference]: With dead ends: 330 [2020-10-28 08:53:52,762 INFO L226 Difference]: Without dead ends: 209 [2020-10-28 08:53:52,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 08:53:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-28 08:53:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-28 08:53:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 08:53:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 285 transitions. [2020-10-28 08:53:52,784 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 285 transitions. Word has length 102 [2020-10-28 08:53:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:52,785 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 285 transitions. [2020-10-28 08:53:52,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:53:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 285 transitions. [2020-10-28 08:53:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 08:53:52,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:52,787 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:52,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:53:52,787 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash 834132689, now seen corresponding path program 24 times [2020-10-28 08:53:52,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:52,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390783537] [2020-10-28 08:53:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:52,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:52,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:57,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:57,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 08:53:57,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:57,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:53:57,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:57,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:57,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:53:57,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:57,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:53:57,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:57,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:57,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:57,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:57,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:57,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:57,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:57,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:57,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:57,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:57,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-28 08:53:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:57,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:57,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:57,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:57,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:57,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:57,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:57,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:57,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:57,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:57,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:57,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2020-10-28 08:53:58,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390783537] [2020-10-28 08:53:58,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:58,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:53:58,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178731714] [2020-10-28 08:53:58,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:53:58,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:53:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:58,006 INFO L87 Difference]: Start difference. First operand 207 states and 285 transitions. Second operand 15 states. [2020-10-28 08:53:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:58,206 INFO L93 Difference]: Finished difference Result 388 states and 544 transitions. [2020-10-28 08:53:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:53:58,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 105 [2020-10-28 08:53:58,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:58,208 INFO L225 Difference]: With dead ends: 388 [2020-10-28 08:53:58,208 INFO L226 Difference]: Without dead ends: 210 [2020-10-28 08:53:58,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-28 08:53:58,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-10-28 08:53:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 08:53:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 287 transitions. [2020-10-28 08:53:58,227 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 287 transitions. Word has length 105 [2020-10-28 08:53:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:58,227 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 287 transitions. [2020-10-28 08:53:58,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:53:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 287 transitions. [2020-10-28 08:53:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 08:53:58,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:58,228 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:58,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:53:58,228 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash -752726033, now seen corresponding path program 25 times [2020-10-28 08:53:58,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:58,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986223855] [2020-10-28 08:53:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:58,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:58,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:58,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:03,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:03,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 08:54:03,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:03,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 08:54:03,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:03,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:03,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:54:03,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 08:54:03,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 08:54:03,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:03,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:03,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:03,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:03,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:03,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:03,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:03,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:03,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:03,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:03,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:03,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:03,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:03,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-28 08:54:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:03,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:03,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:03,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:03,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:03,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:54:03,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:03,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:03,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:03,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:03,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:03,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 2 proven. 477 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-28 08:54:03,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986223855] [2020-10-28 08:54:03,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:03,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:54:03,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130885343] [2020-10-28 08:54:03,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:54:03,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:54:03,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:54:03,718 INFO L87 Difference]: Start difference. First operand 209 states and 287 transitions. Second operand 24 states. [2020-10-28 08:54:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:07,535 INFO L93 Difference]: Finished difference Result 1180 states and 1707 transitions. [2020-10-28 08:54:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-28 08:54:07,536 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 107 [2020-10-28 08:54:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:07,542 INFO L225 Difference]: With dead ends: 1180 [2020-10-28 08:54:07,543 INFO L226 Difference]: Without dead ends: 1059 [2020-10-28 08:54:07,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1284, Invalid=2622, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 08:54:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2020-10-28 08:54:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 221. [2020-10-28 08:54:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-28 08:54:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 306 transitions. [2020-10-28 08:54:07,589 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 306 transitions. Word has length 107 [2020-10-28 08:54:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:07,590 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 306 transitions. [2020-10-28 08:54:07,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:54:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 306 transitions. [2020-10-28 08:54:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 08:54:07,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:07,591 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:07,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:54:07,591 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash 2017270192, now seen corresponding path program 26 times [2020-10-28 08:54:07,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:07,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619338772] [2020-10-28 08:54:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:07,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:07,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:08,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:12,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:12,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 08:54:12,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:12,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 08:54:12,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:12,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:54:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:54:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 08:54:12,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:13,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:13,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:13,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:13,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:13,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:13,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:13,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:13,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:13,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:13,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:13,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:13,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:13,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-28 08:54:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:13,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:13,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:13,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:13,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:13,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:54:13,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:13,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:13,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:13,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:13,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:13,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 2 proven. 532 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-28 08:54:13,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619338772] [2020-10-28 08:54:13,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:13,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:54:13,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328055577] [2020-10-28 08:54:13,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:54:13,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:13,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:54:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:54:13,090 INFO L87 Difference]: Start difference. First operand 221 states and 306 transitions. Second operand 24 states. [2020-10-28 08:54:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:14,040 INFO L93 Difference]: Finished difference Result 356 states and 508 transitions. [2020-10-28 08:54:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:54:14,040 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 110 [2020-10-28 08:54:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:14,042 INFO L225 Difference]: With dead ends: 356 [2020-10-28 08:54:14,042 INFO L226 Difference]: Without dead ends: 226 [2020-10-28 08:54:14,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 08:54:14,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-28 08:54:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2020-10-28 08:54:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 08:54:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 310 transitions. [2020-10-28 08:54:14,064 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 310 transitions. Word has length 110 [2020-10-28 08:54:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:14,064 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 310 transitions. [2020-10-28 08:54:14,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:54:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 310 transitions. [2020-10-28 08:54:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 08:54:14,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:14,065 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:14,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:54:14,066 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash -526816177, now seen corresponding path program 27 times [2020-10-28 08:54:14,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:14,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104419751] [2020-10-28 08:54:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:14,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:14,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:16,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:19,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:19,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 08:54:19,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:19,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 08:54:19,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:19,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:19,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:54:19,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:19,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:54:19,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:19,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:19,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:19,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:19,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:19,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:19,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:19,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:19,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:19,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:19,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-28 08:54:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:19,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:19,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:19,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:19,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:54:19,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:19,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:19,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2020-10-28 08:54:19,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104419751] [2020-10-28 08:54:19,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:19,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:54:19,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338549014] [2020-10-28 08:54:19,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:54:19,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:19,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:54:19,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:19,338 INFO L87 Difference]: Start difference. First operand 224 states and 310 transitions. Second operand 16 states. [2020-10-28 08:54:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:19,553 INFO L93 Difference]: Finished difference Result 420 states and 592 transitions. [2020-10-28 08:54:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:54:19,554 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 113 [2020-10-28 08:54:19,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:19,555 INFO L225 Difference]: With dead ends: 420 [2020-10-28 08:54:19,555 INFO L226 Difference]: Without dead ends: 227 [2020-10-28 08:54:19,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:19,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-28 08:54:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2020-10-28 08:54:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-28 08:54:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 312 transitions. [2020-10-28 08:54:19,577 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 312 transitions. Word has length 113 [2020-10-28 08:54:19,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:19,578 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 312 transitions. [2020-10-28 08:54:19,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:54:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 312 transitions. [2020-10-28 08:54:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 08:54:19,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:19,579 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:19,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:54:19,579 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:19,579 INFO L82 PathProgramCache]: Analyzing trace with hash 516154221, now seen corresponding path program 28 times [2020-10-28 08:54:19,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:19,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907113984] [2020-10-28 08:54:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:19,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:19,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:21,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:24,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:24,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 08:54:24,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:24,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:54:24,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:24,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:54:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 08:54:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 08:54:24,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:25,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:25,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:25,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:25,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:25,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:25,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:25,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:25,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:25,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:25,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:25,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:25,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:25,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-28 08:54:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:25,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:25,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:25,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:25,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:25,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:54:25,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:25,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:25,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 2 proven. 590 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-28 08:54:25,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907113984] [2020-10-28 08:54:25,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:25,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:54:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886085318] [2020-10-28 08:54:25,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:54:25,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:25,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:54:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:54:25,161 INFO L87 Difference]: Start difference. First operand 226 states and 312 transitions. Second operand 26 states. [2020-10-28 08:54:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:29,728 INFO L93 Difference]: Finished difference Result 1264 states and 1829 transitions. [2020-10-28 08:54:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-28 08:54:29,728 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 115 [2020-10-28 08:54:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:29,733 INFO L225 Difference]: With dead ends: 1264 [2020-10-28 08:54:29,733 INFO L226 Difference]: Without dead ends: 1134 [2020-10-28 08:54:29,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1544, Invalid=3148, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 08:54:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2020-10-28 08:54:29,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 235. [2020-10-28 08:54:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-28 08:54:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 326 transitions. [2020-10-28 08:54:29,775 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 326 transitions. Word has length 115 [2020-10-28 08:54:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:29,775 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 326 transitions. [2020-10-28 08:54:29,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:54:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 326 transitions. [2020-10-28 08:54:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 08:54:29,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:29,776 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:29,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:54:29,777 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1073222286, now seen corresponding path program 29 times [2020-10-28 08:54:29,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:29,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716177710] [2020-10-28 08:54:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:29,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:29,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:32,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:34,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:34,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 08:54:34,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:34,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:54:34,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:34,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:34,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:54:34,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:54:34,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 08:54:34,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:35,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:35,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:35,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:35,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:35,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:35,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:35,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:35,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:35,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:35,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:35,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:35,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:35,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-10-28 08:54:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:35,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:35,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:35,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:35,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:35,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:54:35,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:35,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:35,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:35,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:35,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:35,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 2 proven. 651 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-28 08:54:35,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716177710] [2020-10-28 08:54:35,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:35,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:54:35,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406565468] [2020-10-28 08:54:35,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:54:35,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:35,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:54:35,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:54:35,307 INFO L87 Difference]: Start difference. First operand 235 states and 326 transitions. Second operand 26 states. [2020-10-28 08:54:36,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:36,335 INFO L93 Difference]: Finished difference Result 376 states and 538 transitions. [2020-10-28 08:54:36,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:54:36,336 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-10-28 08:54:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:36,337 INFO L225 Difference]: With dead ends: 376 [2020-10-28 08:54:36,337 INFO L226 Difference]: Without dead ends: 240 [2020-10-28 08:54:36,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 08:54:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-28 08:54:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2020-10-28 08:54:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 08:54:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 330 transitions. [2020-10-28 08:54:36,362 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 330 transitions. Word has length 118 [2020-10-28 08:54:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:36,363 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 330 transitions. [2020-10-28 08:54:36,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:54:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 330 transitions. [2020-10-28 08:54:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 08:54:36,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:36,364 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:36,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:54:36,364 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1825696077, now seen corresponding path program 30 times [2020-10-28 08:54:36,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:36,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106284138] [2020-10-28 08:54:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:36,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:36,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:37,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:41,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:41,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 08:54:41,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:41,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:54:41,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:41,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:54:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:54:41,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:41,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:41,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:41,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:41,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-28 08:54:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:41,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:41,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:41,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:41,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:41,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:54:41,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:41,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:41,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:41,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:41,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:41,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2020-10-28 08:54:41,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106284138] [2020-10-28 08:54:41,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:41,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:54:41,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995099052] [2020-10-28 08:54:41,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:54:41,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:41,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:54:41,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:54:41,644 INFO L87 Difference]: Start difference. First operand 238 states and 330 transitions. Second operand 17 states. [2020-10-28 08:54:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:41,891 INFO L93 Difference]: Finished difference Result 446 states and 630 transitions. [2020-10-28 08:54:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:54:41,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-10-28 08:54:41,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:41,893 INFO L225 Difference]: With dead ends: 446 [2020-10-28 08:54:41,893 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 08:54:41,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:54:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 08:54:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2020-10-28 08:54:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-28 08:54:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 332 transitions. [2020-10-28 08:54:41,918 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 332 transitions. Word has length 121 [2020-10-28 08:54:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:41,919 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 332 transitions. [2020-10-28 08:54:41,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:54:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 332 transitions. [2020-10-28 08:54:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 08:54:41,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:41,920 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:41,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 08:54:41,920 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash 278553195, now seen corresponding path program 31 times [2020-10-28 08:54:41,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:41,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406233223] [2020-10-28 08:54:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:41,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:42,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:42,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:46,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:46,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 08:54:46,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:46,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:54:46,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:46,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:46,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:54:46,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:54:46,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 08:54:46,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:47,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:47,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:47,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:47,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:54:47,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:47,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:47,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:47,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:47,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:47,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:47,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-28 08:54:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:47,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:47,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:54:47,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:47,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-28 08:54:47,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406233223] [2020-10-28 08:54:47,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:47,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:54:47,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169444069] [2020-10-28 08:54:47,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:54:47,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:54:47,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:54:47,493 INFO L87 Difference]: Start difference. First operand 240 states and 332 transitions. Second operand 27 states.