/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:08:32,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:08:32,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:08:32,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:08:32,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:08:32,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:08:32,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:08:32,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:08:32,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:08:32,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:08:32,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:08:32,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:08:32,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:08:32,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:08:32,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:08:32,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:08:32,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:08:32,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:08:32,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:08:32,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:08:32,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:08:32,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:08:32,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:08:32,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:08:32,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:08:32,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:08:32,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:08:32,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:08:32,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:08:32,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:08:32,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:08:32,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:08:32,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:08:32,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:08:32,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:08:32,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:08:32,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:08:32,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:08:32,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:08:32,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:08:32,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:08:32,867 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 [2020-09-25 01:08:32,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:08:32,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:08:32,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:08:32,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:08:32,924 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:08:32,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:08:32,925 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:08:32,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:08:32,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:08:32,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:08:32,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:08:32,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:08:32,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:08:32,927 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:08:32,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:08:32,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:08:32,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:08:32,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:08:32,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:08:32,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:08:32,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:08:32,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:08:32,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:08:32,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:08:32,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:08:32,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:08:32,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:08:32,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:08:32,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:08:32,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=DEEPEST;log-additional-information=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=DEEPEST;log-additional-information=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=DEEPEST;log-additional-information=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=DEEPEST;log-additional-information=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=DEEPEST;log-additional-information=true; [2020-09-25 01:08:33,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:08:33,559 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:08:33,566 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:08:33,569 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:08:33,571 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:08:33,572 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-09-25 01:08:33,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b43eb3db/6dd01606f2ac49809b6916869bfe426c/FLAG431adcc69 [2020-09-25 01:08:34,174 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:08:34,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-09-25 01:08:34,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b43eb3db/6dd01606f2ac49809b6916869bfe426c/FLAG431adcc69 [2020-09-25 01:08:34,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b43eb3db/6dd01606f2ac49809b6916869bfe426c [2020-09-25 01:08:34,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:08:34,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:08:34,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:08:34,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:08:34,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:08:34,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:08:34" (1/1) ... [2020-09-25 01:08:34,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b8f57a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:34, skipping insertion in model container [2020-09-25 01:08:34,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:08:34" (1/1) ... [2020-09-25 01:08:34,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:08:34,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:08:34,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:08:34,910 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:08:34,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:08:35,049 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:08:35,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35 WrapperNode [2020-09-25 01:08:35,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:08:35,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:08:35,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:08:35,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:08:35,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:08:35,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:08:35,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:08:35,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:08:35,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (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 [2020-09-25 01:08:35,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:08:35,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:08:35,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:08:35,194 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-09-25 01:08:35,194 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-09-25 01:08:35,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:08:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:08:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:08:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 01:08:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-09-25 01:08:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 01:08:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-09-25 01:08:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 01:08:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:08:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 01:08:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 01:08:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:08:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:08:35,649 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:08:35,650 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-09-25 01:08:35,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:08:35 BoogieIcfgContainer [2020-09-25 01:08:35,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:08:35,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:08:35,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:08:35,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:08:35,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:08:34" (1/3) ... [2020-09-25 01:08:35,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652476c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:08:35, skipping insertion in model container [2020-09-25 01:08:35,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (2/3) ... [2020-09-25 01:08:35,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652476c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:08:35, skipping insertion in model container [2020-09-25 01:08:35,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:08:35" (3/3) ... [2020-09-25 01:08:35,676 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-09-25 01:08:35,687 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:08:35,697 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:08:35,718 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:08:35,751 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:08:35,751 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:08:35,752 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:08:35,752 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:08:35,752 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:08:35,752 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:08:35,752 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:08:35,752 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:08:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2020-09-25 01:08:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-25 01:08:35,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:35,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:35,789 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:35,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1588916751, now seen corresponding path program 1 times [2020-09-25 01:08:35,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:35,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393230734] [2020-09-25 01:08:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:35,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:36,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:36,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:36,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:36,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 01:08:36,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:36,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-09-25 01:08:36,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:36,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 01:08:36,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:36,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:08:36,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:36,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:36,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:36,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:36,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:36,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 01:08:36,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:36,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:36,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:36,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:36,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:36,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393230734] [2020-09-25 01:08:36,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:08:36,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 01:08:36,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000299462] [2020-09-25 01:08:36,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 01:08:36,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 01:08:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:08:36,641 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 3 states. [2020-09-25 01:08:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:36,977 INFO L93 Difference]: Finished difference Result 245 states and 295 transitions. [2020-09-25 01:08:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 01:08:36,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-25 01:08:36,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:36,995 INFO L225 Difference]: With dead ends: 245 [2020-09-25 01:08:36,995 INFO L226 Difference]: Without dead ends: 123 [2020-09-25 01:08:37,001 INFO L675 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 [2020-09-25 01:08:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-25 01:08:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-09-25 01:08:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-25 01:08:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-09-25 01:08:37,082 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 23 [2020-09-25 01:08:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:37,083 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-09-25 01:08:37,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 01:08:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-09-25 01:08:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-25 01:08:37,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:37,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:37,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:08:37,087 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:37,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:37,087 INFO L82 PathProgramCache]: Analyzing trace with hash -119454780, now seen corresponding path program 1 times [2020-09-25 01:08:37,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:37,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523406622] [2020-09-25 01:08:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:37,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:37,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:37,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:37,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 01:08:37,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:37,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-09-25 01:08:37,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:37,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:08:37,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:08:37,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 01:08:37,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:37,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:37,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:37,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:37,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:37,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:37,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 01:08:37,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:37,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:37,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:37,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:37,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:37,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523406622] [2020-09-25 01:08:37,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:08:37,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:08:37,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640360847] [2020-09-25 01:08:37,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:08:37,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:37,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:08:37,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:08:37,475 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 4 states. [2020-09-25 01:08:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:37,880 INFO L93 Difference]: Finished difference Result 303 states and 342 transitions. [2020-09-25 01:08:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 01:08:37,880 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-09-25 01:08:37,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:37,886 INFO L225 Difference]: With dead ends: 303 [2020-09-25 01:08:37,887 INFO L226 Difference]: Without dead ends: 199 [2020-09-25 01:08:37,889 INFO L675 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 [2020-09-25 01:08:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-25 01:08:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 124. [2020-09-25 01:08:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-25 01:08:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2020-09-25 01:08:37,931 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 23 [2020-09-25 01:08:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:37,931 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2020-09-25 01:08:37,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:08:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2020-09-25 01:08:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 01:08:37,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:37,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:37,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:08:37,934 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:37,934 INFO L82 PathProgramCache]: Analyzing trace with hash -395870253, now seen corresponding path program 1 times [2020-09-25 01:08:37,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:37,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438063533] [2020-09-25 01:08:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:37,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:37,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:38,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 01:08:38,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:38,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-09-25 01:08:38,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:38,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:08:38,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:08:38,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 01:08:38,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:38,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:38,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:38,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:38,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:38,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 01:08:38,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:38,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:38,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:38,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:38,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:38,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438063533] [2020-09-25 01:08:38,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:38,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 01:08:38,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754891653] [2020-09-25 01:08:38,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 01:08:38,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:38,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 01:08:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:08:38,502 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 6 states. [2020-09-25 01:08:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:38,951 INFO L93 Difference]: Finished difference Result 310 states and 349 transitions. [2020-09-25 01:08:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 01:08:38,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-09-25 01:08:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:38,957 INFO L225 Difference]: With dead ends: 310 [2020-09-25 01:08:38,957 INFO L226 Difference]: Without dead ends: 206 [2020-09-25 01:08:38,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:08:38,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-25 01:08:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 131. [2020-09-25 01:08:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-25 01:08:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2020-09-25 01:08:38,987 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 30 [2020-09-25 01:08:38,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:38,988 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2020-09-25 01:08:38,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 01:08:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2020-09-25 01:08:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 01:08:38,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:38,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:38,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:08:38,990 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:38,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1926718692, now seen corresponding path program 2 times [2020-09-25 01:08:38,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:38,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985583345] [2020-09-25 01:08:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:39,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:39,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:39,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:39,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 01:08:39,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:39,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-09-25 01:08:39,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:39,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:08:39,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:08:39,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 01:08:39,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:39,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:39,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:39,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:39,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:39,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 01:08:39,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:39,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:39,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:39,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985583345] [2020-09-25 01:08:39,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:39,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 01:08:39,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084805454] [2020-09-25 01:08:39,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 01:08:39,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:39,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 01:08:39,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:08:39,901 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 8 states. [2020-09-25 01:08:40,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:40,379 INFO L93 Difference]: Finished difference Result 317 states and 356 transitions. [2020-09-25 01:08:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 01:08:40,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-09-25 01:08:40,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:40,381 INFO L225 Difference]: With dead ends: 317 [2020-09-25 01:08:40,382 INFO L226 Difference]: Without dead ends: 213 [2020-09-25 01:08:40,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:08:40,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-25 01:08:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 138. [2020-09-25 01:08:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-25 01:08:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 151 transitions. [2020-09-25 01:08:40,399 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 151 transitions. Word has length 37 [2020-09-25 01:08:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:40,400 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 151 transitions. [2020-09-25 01:08:40,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 01:08:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 151 transitions. [2020-09-25 01:08:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 01:08:40,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:40,402 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:40,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:08:40,404 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:40,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1889524403, now seen corresponding path program 3 times [2020-09-25 01:08:40,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:40,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575387293] [2020-09-25 01:08:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:40,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:40,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:40,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:41,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 01:08:41,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:41,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-09-25 01:08:41,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:41,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:08:41,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:08:41,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 01:08:41,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:41,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:41,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:41,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:41,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:41,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 01:08:41,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:41,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:41,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575387293] [2020-09-25 01:08:41,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:41,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 01:08:41,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360812545] [2020-09-25 01:08:41,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 01:08:41,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:41,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 01:08:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 01:08:41,643 INFO L87 Difference]: Start difference. First operand 138 states and 151 transitions. Second operand 10 states. [2020-09-25 01:08:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:42,199 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2020-09-25 01:08:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 01:08:42,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-09-25 01:08:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:42,202 INFO L225 Difference]: With dead ends: 324 [2020-09-25 01:08:42,202 INFO L226 Difference]: Without dead ends: 220 [2020-09-25 01:08:42,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 01:08:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-25 01:08:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 145. [2020-09-25 01:08:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-25 01:08:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-09-25 01:08:42,212 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 44 [2020-09-25 01:08:42,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:42,212 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-09-25 01:08:42,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 01:08:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-09-25 01:08:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 01:08:42,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:42,215 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:42,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:08:42,215 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash -898822652, now seen corresponding path program 4 times [2020-09-25 01:08:42,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:42,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835251863] [2020-09-25 01:08:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:42,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:42,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:42,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:43,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:43,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 01:08:43,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:43,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-09-25 01:08:43,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:43,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:08:43,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:08:43,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 01:08:43,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:43,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:43,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:43,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:43,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:43,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:43,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 01:08:43,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:43,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:43,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 01:08:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:43,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835251863] [2020-09-25 01:08:43,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:43,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 01:08:43,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376477048] [2020-09-25 01:08:43,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 01:08:43,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:43,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 01:08:43,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:08:43,704 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 12 states. [2020-09-25 01:08:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:44,352 INFO L93 Difference]: Finished difference Result 331 states and 370 transitions. [2020-09-25 01:08:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 01:08:44,354 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-09-25 01:08:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:44,357 INFO L225 Difference]: With dead ends: 331 [2020-09-25 01:08:44,358 INFO L226 Difference]: Without dead ends: 227 [2020-09-25 01:08:44,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 01:08:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-25 01:08:44,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 152. [2020-09-25 01:08:44,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-25 01:08:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2020-09-25 01:08:44,367 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 51 [2020-09-25 01:08:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:44,369 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2020-09-25 01:08:44,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 01:08:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2020-09-25 01:08:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 01:08:44,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:44,373 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:44,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:08:44,373 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:44,374 INFO L82 PathProgramCache]: Analyzing trace with hash -97538669, now seen corresponding path program 5 times [2020-09-25 01:08:44,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:44,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639594817] [2020-09-25 01:08:44,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:44,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:44,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:44,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:45,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:45,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 01:08:45,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:45,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1563 [2020-09-25 01:08:45,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:45,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 01:08:45,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:08:45,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 01:08:45,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:46,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:46,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:46,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:46,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:46,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:46,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:08:46,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:46,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:46,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:46,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:46,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:46,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639594817] [2020-09-25 01:08:46,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:46,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 01:08:46,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938064593] [2020-09-25 01:08:46,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 01:08:46,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:46,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 01:08:46,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-25 01:08:46,103 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand 14 states. [2020-09-25 01:08:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:46,993 INFO L93 Difference]: Finished difference Result 338 states and 377 transitions. [2020-09-25 01:08:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 01:08:46,994 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-09-25 01:08:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:47,000 INFO L225 Difference]: With dead ends: 338 [2020-09-25 01:08:47,001 INFO L226 Difference]: Without dead ends: 234 [2020-09-25 01:08:47,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-25 01:08:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-25 01:08:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 159. [2020-09-25 01:08:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-25 01:08:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 172 transitions. [2020-09-25 01:08:47,016 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 172 transitions. Word has length 58 [2020-09-25 01:08:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:47,016 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 172 transitions. [2020-09-25 01:08:47,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 01:08:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 172 transitions. [2020-09-25 01:08:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 01:08:47,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:47,018 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:47,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 01:08:47,018 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:47,019 INFO L82 PathProgramCache]: Analyzing trace with hash -841728220, now seen corresponding path program 6 times [2020-09-25 01:08:47,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:47,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459532907] [2020-09-25 01:08:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:47,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:47,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:49,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:49,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 01:08:49,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:49,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2060 [2020-09-25 01:08:49,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 01:08:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:08:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 01:08:49,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:49,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:49,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:49,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:49,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:49,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:08:49,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:49,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:49,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:49,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459532907] [2020-09-25 01:08:49,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:49,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 01:08:49,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655302247] [2020-09-25 01:08:49,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 01:08:49,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 01:08:49,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 01:08:49,256 INFO L87 Difference]: Start difference. First operand 159 states and 172 transitions. Second operand 16 states. [2020-09-25 01:08:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:50,048 INFO L93 Difference]: Finished difference Result 345 states and 384 transitions. [2020-09-25 01:08:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 01:08:50,048 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-09-25 01:08:50,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:50,051 INFO L225 Difference]: With dead ends: 345 [2020-09-25 01:08:50,051 INFO L226 Difference]: Without dead ends: 241 [2020-09-25 01:08:50,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-25 01:08:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-25 01:08:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 166. [2020-09-25 01:08:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-25 01:08:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2020-09-25 01:08:50,064 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 65 [2020-09-25 01:08:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:50,064 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2020-09-25 01:08:50,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 01:08:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2020-09-25 01:08:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-25 01:08:50,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:50,070 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:50,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 01:08:50,071 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:50,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1163593613, now seen corresponding path program 7 times [2020-09-25 01:08:50,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:50,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412990506] [2020-09-25 01:08:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:50,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:50,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:50,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:52,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 01:08:52,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:52,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2539 [2020-09-25 01:08:52,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:52,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 01:08:52,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:08:52,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 01:08:52,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:52,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:52,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:52,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:52,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:52,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:08:52,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:52,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:52,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:52,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:52,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:52,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412990506] [2020-09-25 01:08:52,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:52,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 01:08:52,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928470298] [2020-09-25 01:08:52,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 01:08:52,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:52,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 01:08:52,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-25 01:08:52,877 INFO L87 Difference]: Start difference. First operand 166 states and 179 transitions. Second operand 18 states. [2020-09-25 01:08:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:53,713 INFO L93 Difference]: Finished difference Result 352 states and 391 transitions. [2020-09-25 01:08:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 01:08:53,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-09-25 01:08:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:53,715 INFO L225 Difference]: With dead ends: 352 [2020-09-25 01:08:53,718 INFO L226 Difference]: Without dead ends: 248 [2020-09-25 01:08:53,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-25 01:08:53,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-25 01:08:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 173. [2020-09-25 01:08:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-09-25 01:08:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 186 transitions. [2020-09-25 01:08:53,731 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 186 transitions. Word has length 72 [2020-09-25 01:08:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:53,732 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 186 transitions. [2020-09-25 01:08:53,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 01:08:53,732 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 186 transitions. [2020-09-25 01:08:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 01:08:53,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:53,733 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:53,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 01:08:53,734 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:53,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1950418876, now seen corresponding path program 8 times [2020-09-25 01:08:53,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:53,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553838760] [2020-09-25 01:08:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:53,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:53,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:56,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:56,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 01:08:56,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:56,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2682 [2020-09-25 01:08:56,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:56,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 01:08:56,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:08:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 01:08:56,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:56,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:56,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:56,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:56,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:56,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:56,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:08:56,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:56,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:56,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:56,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:56,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:56,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553838760] [2020-09-25 01:08:56,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:56,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 01:08:56,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944410504] [2020-09-25 01:08:56,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 01:08:56,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:56,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 01:08:56,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-25 01:08:56,700 INFO L87 Difference]: Start difference. First operand 173 states and 186 transitions. Second operand 20 states. [2020-09-25 01:08:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:57,765 INFO L93 Difference]: Finished difference Result 359 states and 398 transitions. [2020-09-25 01:08:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 01:08:57,766 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-09-25 01:08:57,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:57,768 INFO L225 Difference]: With dead ends: 359 [2020-09-25 01:08:57,769 INFO L226 Difference]: Without dead ends: 255 [2020-09-25 01:08:57,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 01:08:57,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-25 01:08:57,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 180. [2020-09-25 01:08:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-25 01:08:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 193 transitions. [2020-09-25 01:08:57,779 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 193 transitions. Word has length 79 [2020-09-25 01:08:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:57,779 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 193 transitions. [2020-09-25 01:08:57,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 01:08:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 193 transitions. [2020-09-25 01:08:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-25 01:08:57,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:57,780 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:57,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 01:08:57,781 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash 386775891, now seen corresponding path program 9 times [2020-09-25 01:08:57,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:57,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292616180] [2020-09-25 01:08:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:57,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:57,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:59,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:00,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:00,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-25 01:09:00,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:09:00,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2786 [2020-09-25 01:09:00,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 01:09:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:09:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 01:09:00,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:00,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:00,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:00,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:00,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:00,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:00,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:09:00,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:00,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:00,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292616180] [2020-09-25 01:09:00,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:00,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 01:09:00,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764920770] [2020-09-25 01:09:00,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 01:09:00,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:00,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 01:09:00,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-25 01:09:00,859 INFO L87 Difference]: Start difference. First operand 180 states and 193 transitions. Second operand 22 states. [2020-09-25 01:09:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:02,072 INFO L93 Difference]: Finished difference Result 366 states and 405 transitions. [2020-09-25 01:09:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 01:09:02,073 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2020-09-25 01:09:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:02,076 INFO L225 Difference]: With dead ends: 366 [2020-09-25 01:09:02,076 INFO L226 Difference]: Without dead ends: 262 [2020-09-25 01:09:02,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 01:09:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-25 01:09:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 187. [2020-09-25 01:09:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-09-25 01:09:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 200 transitions. [2020-09-25 01:09:02,086 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 200 transitions. Word has length 86 [2020-09-25 01:09:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:02,086 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 200 transitions. [2020-09-25 01:09:02,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 01:09:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 200 transitions. [2020-09-25 01:09:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-25 01:09:02,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:02,088 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:02,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 01:09:02,088 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:02,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1935620452, now seen corresponding path program 10 times [2020-09-25 01:09:02,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:02,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399368134] [2020-09-25 01:09:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:02,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:02,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:03,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:05,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:05,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 01:09:05,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:09:05,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3073 [2020-09-25 01:09:05,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:05,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 01:09:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:09:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 01:09:05,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:05,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:05,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:05,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:05,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:05,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:05,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:09:05,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:05,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:05,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399368134] [2020-09-25 01:09:05,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:05,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 01:09:05,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354613089] [2020-09-25 01:09:05,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 01:09:05,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:05,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 01:09:05,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-25 01:09:05,520 INFO L87 Difference]: Start difference. First operand 187 states and 200 transitions. Second operand 24 states. [2020-09-25 01:09:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:06,889 INFO L93 Difference]: Finished difference Result 373 states and 412 transitions. [2020-09-25 01:09:06,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-25 01:09:06,890 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-09-25 01:09:06,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:06,891 INFO L225 Difference]: With dead ends: 373 [2020-09-25 01:09:06,892 INFO L226 Difference]: Without dead ends: 269 [2020-09-25 01:09:06,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 01:09:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-25 01:09:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 194. [2020-09-25 01:09:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-25 01:09:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 207 transitions. [2020-09-25 01:09:06,902 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 207 transitions. Word has length 93 [2020-09-25 01:09:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:06,902 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 207 transitions. [2020-09-25 01:09:06,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 01:09:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 207 transitions. [2020-09-25 01:09:06,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-25 01:09:06,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:06,904 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:06,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 01:09:06,904 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:06,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2080901581, now seen corresponding path program 11 times [2020-09-25 01:09:06,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:06,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569937725] [2020-09-25 01:09:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:06,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:06,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:08,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:10,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:10,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-25 01:09:10,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:09:10,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3422 [2020-09-25 01:09:10,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 01:09:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:09:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 01:09:10,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:10,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:10,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:10,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:10,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:10,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:10,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:09:10,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:10,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:10,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:10,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569937725] [2020-09-25 01:09:10,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:10,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 01:09:10,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089683875] [2020-09-25 01:09:10,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 01:09:10,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 01:09:10,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-25 01:09:10,781 INFO L87 Difference]: Start difference. First operand 194 states and 207 transitions. Second operand 26 states. [2020-09-25 01:09:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:12,347 INFO L93 Difference]: Finished difference Result 380 states and 419 transitions. [2020-09-25 01:09:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-25 01:09:12,348 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 100 [2020-09-25 01:09:12,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:12,350 INFO L225 Difference]: With dead ends: 380 [2020-09-25 01:09:12,350 INFO L226 Difference]: Without dead ends: 276 [2020-09-25 01:09:12,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 01:09:12,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-09-25 01:09:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 201. [2020-09-25 01:09:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-09-25 01:09:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 214 transitions. [2020-09-25 01:09:12,359 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 214 transitions. Word has length 100 [2020-09-25 01:09:12,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:12,360 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 214 transitions. [2020-09-25 01:09:12,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 01:09:12,360 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 214 transitions. [2020-09-25 01:09:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-25 01:09:12,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:12,361 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:12,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 01:09:12,361 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1952907908, now seen corresponding path program 12 times [2020-09-25 01:09:12,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:12,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543205589] [2020-09-25 01:09:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:12,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:12,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:12,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:15,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:15,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-09-25 01:09:15,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:09:15,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2723 [2020-09-25 01:09:15,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 01:09:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:09:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-25 01:09:15,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:15,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:15,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:15,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:15,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:15,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:15,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:09:15,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:15,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:15,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:15,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:15,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:15,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543205589] [2020-09-25 01:09:15,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:15,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-25 01:09:15,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922317210] [2020-09-25 01:09:15,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-25 01:09:15,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:15,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-25 01:09:15,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-25 01:09:15,577 INFO L87 Difference]: Start difference. First operand 201 states and 214 transitions. Second operand 28 states. [2020-09-25 01:09:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:16,719 INFO L93 Difference]: Finished difference Result 387 states and 426 transitions. [2020-09-25 01:09:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-25 01:09:16,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2020-09-25 01:09:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:16,723 INFO L225 Difference]: With dead ends: 387 [2020-09-25 01:09:16,724 INFO L226 Difference]: Without dead ends: 283 [2020-09-25 01:09:16,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 01:09:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-25 01:09:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 208. [2020-09-25 01:09:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-09-25 01:09:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 221 transitions. [2020-09-25 01:09:16,744 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 221 transitions. Word has length 107 [2020-09-25 01:09:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:16,744 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 221 transitions. [2020-09-25 01:09:16,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-25 01:09:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 221 transitions. [2020-09-25 01:09:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-25 01:09:16,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:16,751 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:16,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 01:09:16,752 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:16,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1701947667, now seen corresponding path program 13 times [2020-09-25 01:09:16,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:16,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825934238] [2020-09-25 01:09:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:16,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:16,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:17,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:20,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:20,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-25 01:09:20,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:09:20,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3567 [2020-09-25 01:09:20,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:20,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 01:09:20,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:09:20,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-25 01:09:20,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:20,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:20,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:20,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:20,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:20,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:20,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:09:20,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:20,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:20,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:20,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:20,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:20,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825934238] [2020-09-25 01:09:20,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:20,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 01:09:20,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23517306] [2020-09-25 01:09:20,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 01:09:20,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:20,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 01:09:20,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-25 01:09:20,877 INFO L87 Difference]: Start difference. First operand 208 states and 221 transitions. Second operand 30 states.