/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:31:01,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:31:01,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:31:01,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:31:01,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:31:01,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:31:01,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:31:01,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:31:01,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:31:01,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:31:01,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:31:01,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:31:01,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:31:01,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:31:01,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:31:01,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:31:01,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:31:01,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:31:01,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:31:01,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:31:01,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:31:01,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:31:01,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:31:01,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:31:01,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:31:01,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:31:01,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:31:01,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:31:01,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:31:02,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:31:02,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:31:02,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:31:02,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:31:02,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:31:02,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:31:02,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:31:02,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:31:02,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:31:02,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:31:02,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:31:02,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:31:02,012 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 [2020-09-21 11:31:02,039 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:31:02,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:31:02,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:31:02,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:31:02,043 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:31:02,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:31:02,043 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:31:02,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:31:02,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:31:02,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:31:02,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:31:02,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:31:02,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:31:02,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:31:02,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:31:02,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:31:02,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:31:02,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:31:02,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:31:02,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:31:02,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:31:02,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:02,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:31:02,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:31:02,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:31:02,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:31:02,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:31:02,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:31:02,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:31:02,048 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:31:02,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:31:02,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:31:02,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:31:02,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:31:02,592 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:31:02,593 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-09-21 11:31:02,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28980ef68/83548f1f53134e419a9a7dc296829165/FLAG904fc54dc [2020-09-21 11:31:03,252 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:03,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/heavy-2.c [2020-09-21 11:31:03,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28980ef68/83548f1f53134e419a9a7dc296829165/FLAG904fc54dc [2020-09-21 11:31:03,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28980ef68/83548f1f53134e419a9a7dc296829165 [2020-09-21 11:31:03,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:03,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:03,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:03,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:03,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:03,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:03" (1/1) ... [2020-09-21 11:31:03,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2c37a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03, skipping insertion in model container [2020-09-21 11:31:03,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:03" (1/1) ... [2020-09-21 11:31:03,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:03,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:03,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:03,899 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:03,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:03,998 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:03,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03 WrapperNode [2020-09-21 11:31:03,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:03,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:04,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:04,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:04,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03" (1/1) ... [2020-09-21 11:31:04,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03" (1/1) ... [2020-09-21 11:31:04,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03" (1/1) ... [2020-09-21 11:31:04,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03" (1/1) ... [2020-09-21 11:31:04,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03" (1/1) ... [2020-09-21 11:31:04,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03" (1/1) ... [2020-09-21 11:31:04,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03" (1/1) ... [2020-09-21 11:31:04,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:04,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:04,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:04,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:04,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03" (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 [2020-09-21 11:31:04,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:04,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:04,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:04,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:04,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:04,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:31:04,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:31:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:31:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-09-21 11:31:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:31:04,509 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:04,509 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 11:31:04,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:04 BoogieIcfgContainer [2020-09-21 11:31:04,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:04,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:04,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:04,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:04,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:03" (1/3) ... [2020-09-21 11:31:04,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38824587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:04, skipping insertion in model container [2020-09-21 11:31:04,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:03" (2/3) ... [2020-09-21 11:31:04,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38824587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:04, skipping insertion in model container [2020-09-21 11:31:04,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:04" (3/3) ... [2020-09-21 11:31:04,525 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-09-21 11:31:04,543 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:04,569 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:04,600 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:04,635 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:04,636 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:04,636 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:04,636 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:04,636 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:04,636 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:04,636 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:04,636 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-21 11:31:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-21 11:31:04,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:04,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:04,665 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:04,672 INFO L82 PathProgramCache]: Analyzing trace with hash 242978043, now seen corresponding path program 1 times [2020-09-21 11:31:04,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:04,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994263871] [2020-09-21 11:31:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,831 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,831 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,831 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,831 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 11:31:04,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:31:04,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:31:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:04,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,940 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,941 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,941 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,941 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:04,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:31:04,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:04,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:04,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994263871] [2020-09-21 11:31:04,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:04,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:31:04,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004790776] [2020-09-21 11:31:04,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:31:04,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:31:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:04,994 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-09-21 11:31:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:05,122 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2020-09-21 11:31:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:31:05,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-09-21 11:31:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:05,137 INFO L225 Difference]: With dead ends: 42 [2020-09-21 11:31:05,138 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 11:31:05,141 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 [2020-09-21 11:31:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 11:31:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-09-21 11:31:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-21 11:31:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-09-21 11:31:05,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2020-09-21 11:31:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:05,183 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-09-21 11:31:05,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:31:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-09-21 11:31:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-21 11:31:05,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:05,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:05,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:05,185 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:05,186 INFO L82 PathProgramCache]: Analyzing trace with hash 242949213, now seen corresponding path program 1 times [2020-09-21 11:31:05,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:05,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382881058] [2020-09-21 11:31:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:05,225 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:05,225 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:05,225 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:05,225 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:05,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 11:31:05,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:31:05,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:05,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:05,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:05,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:05,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:05,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:05,318 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:05,318 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:05,318 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:05,318 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:05,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:05,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:05,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:05,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:05,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:05,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:05,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:05,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:05,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382881058] [2020-09-21 11:31:05,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:05,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:31:05,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897022946] [2020-09-21 11:31:05,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:31:05,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:05,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:31:05,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:05,340 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-09-21 11:31:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:05,458 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-09-21 11:31:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:05,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-09-21 11:31:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:05,460 INFO L225 Difference]: With dead ends: 36 [2020-09-21 11:31:05,460 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 11:31:05,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 11:31:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2020-09-21 11:31:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 11:31:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-09-21 11:31:05,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2020-09-21 11:31:05,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:05,470 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-09-21 11:31:05,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:31:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-09-21 11:31:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 11:31:05,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:05,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:05,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:05,472 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:05,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash 713101374, now seen corresponding path program 1 times [2020-09-21 11:31:05,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:05,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442758747] [2020-09-21 11:31:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:05,506 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:05,506 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:05,506 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:05,507 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:05,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:31:05,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:05,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:31:05,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:05,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:05,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:31:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:05,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:05,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:05,590 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:05,591 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:05,591 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:05,592 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:05,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:05,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:05,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:05,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:05,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:05,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442758747] [2020-09-21 11:31:05,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:05,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:31:05,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220762843] [2020-09-21 11:31:05,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:31:05,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:05,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:31:05,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:05,607 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-09-21 11:31:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:05,724 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-09-21 11:31:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:05,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-21 11:31:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:05,726 INFO L225 Difference]: With dead ends: 40 [2020-09-21 11:31:05,727 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 11:31:05,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 11:31:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2020-09-21 11:31:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 11:31:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-09-21 11:31:05,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-09-21 11:31:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:05,737 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-09-21 11:31:05,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:31:05,738 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-09-21 11:31:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 11:31:05,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:05,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:05,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:31:05,740 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:05,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1111837415, now seen corresponding path program 1 times [2020-09-21 11:31:05,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:05,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884508119] [2020-09-21 11:31:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:05,768 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:05,771 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:05,771 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:05,771 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:05,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:31:05,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:05,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:31:05,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:05,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:05,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:05,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:05,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:05,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:05,873 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:05,873 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:05,874 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:05,874 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:05,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:05,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:05,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:05,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:05,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:05,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:05,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:05,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884508119] [2020-09-21 11:31:05,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:05,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:31:05,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958010855] [2020-09-21 11:31:05,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:31:05,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:05,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:31:05,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:05,888 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-09-21 11:31:05,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:05,967 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-09-21 11:31:05,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:05,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-21 11:31:05,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:05,969 INFO L225 Difference]: With dead ends: 31 [2020-09-21 11:31:05,969 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:31:05,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:31:05,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-09-21 11:31:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:31:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-09-21 11:31:05,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-09-21 11:31:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:05,977 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-09-21 11:31:05,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:31:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-09-21 11:31:05,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 11:31:05,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:05,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:05,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:31:05,979 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:05,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:05,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1672606071, now seen corresponding path program 1 times [2020-09-21 11:31:05,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:05,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730467479] [2020-09-21 11:31:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:06,079 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:06,079 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:06,080 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:06,080 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:06,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 11:31:06,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:06,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:31:06,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:06,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:31:06,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:06,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:31:06,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:31:06,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:06,208 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:06,209 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:06,209 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:06,209 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:06,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:06,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:06,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:06,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:06,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:06,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730467479] [2020-09-21 11:31:06,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:06,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:31:06,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634382186] [2020-09-21 11:31:06,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:06,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:06,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:06,234 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-09-21 11:31:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:06,336 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-09-21 11:31:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:06,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-21 11:31:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:06,337 INFO L225 Difference]: With dead ends: 34 [2020-09-21 11:31:06,338 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 11:31:06,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 11:31:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-09-21 11:31:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 11:31:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-09-21 11:31:06,344 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-09-21 11:31:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:06,344 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-09-21 11:31:06,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-09-21 11:31:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:31:06,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:06,346 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:06,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:31:06,346 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:06,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1758170709, now seen corresponding path program 2 times [2020-09-21 11:31:06,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:06,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179339773] [2020-09-21 11:31:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:06,392 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:06,392 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:06,392 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:06,392 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:06,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:31:06,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:06,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:31:06,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:06,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:06,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:06,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:31:06,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:06,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:06,545 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:06,545 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:06,546 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:06,546 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:06,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:06,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:06,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:06,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:06,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:06,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:06,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:06,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:06,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179339773] [2020-09-21 11:31:06,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:06,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:31:06,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454430957] [2020-09-21 11:31:06,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:06,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:06,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:06,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:06,557 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-09-21 11:31:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:06,660 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-09-21 11:31:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:06,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-09-21 11:31:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:06,662 INFO L225 Difference]: With dead ends: 38 [2020-09-21 11:31:06,662 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 11:31:06,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 11:31:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-21 11:31:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 11:31:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-09-21 11:31:06,669 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-09-21 11:31:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:06,669 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-09-21 11:31:06,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:06,669 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-09-21 11:31:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:31:06,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:06,670 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:06,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:31:06,671 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:06,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:06,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1913558093, now seen corresponding path program 3 times [2020-09-21 11:31:06,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:06,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322479452] [2020-09-21 11:31:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:06,711 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:06,712 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:06,712 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:06,712 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:06,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:31:06,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:06,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:31:06,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:31:06,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:06,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:06,833 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:06,834 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:06,834 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:06,835 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:06,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:06,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:06,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:06,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:06,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:06,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322479452] [2020-09-21 11:31:06,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:06,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:31:06,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080569837] [2020-09-21 11:31:06,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:06,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:06,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:06,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:06,852 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2020-09-21 11:31:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:06,973 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-09-21 11:31:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:06,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-21 11:31:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:06,974 INFO L225 Difference]: With dead ends: 42 [2020-09-21 11:31:06,974 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 11:31:06,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 11:31:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-09-21 11:31:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:31:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-21 11:31:06,986 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-09-21 11:31:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:06,987 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-21 11:31:06,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-21 11:31:06,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 11:31:06,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:06,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:06,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:31:06,989 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:06,989 INFO L82 PathProgramCache]: Analyzing trace with hash 18180497, now seen corresponding path program 4 times [2020-09-21 11:31:06,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:06,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743887757] [2020-09-21 11:31:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:07,051 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:07,051 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:07,051 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:07,051 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:07,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:31:07,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:07,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:31:07,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:07,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:07,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:07,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:31:07,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:07,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:07,186 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:07,186 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:07,186 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:07,187 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:07,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:07,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:07,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:07,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:07,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:07,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:07,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:07,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:07,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743887757] [2020-09-21 11:31:07,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:07,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:31:07,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826470468] [2020-09-21 11:31:07,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:31:07,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:07,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:31:07,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:07,199 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2020-09-21 11:31:07,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:07,341 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-09-21 11:31:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:31:07,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-09-21 11:31:07,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:07,342 INFO L225 Difference]: With dead ends: 46 [2020-09-21 11:31:07,342 INFO L226 Difference]: Without dead ends: 29 [2020-09-21 11:31:07,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:07,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-21 11:31:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-21 11:31:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 11:31:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-09-21 11:31:07,352 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2020-09-21 11:31:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:07,353 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-09-21 11:31:07,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:31:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-09-21 11:31:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:31:07,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:07,353 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:07,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:31:07,354 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash 993093615, now seen corresponding path program 5 times [2020-09-21 11:31:07,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:07,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017202802] [2020-09-21 11:31:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:07,410 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:07,410 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:07,410 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:07,410 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:07,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:31:07,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:07,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:31:07,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:07,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:31:07,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:07,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:31:07,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:07,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:07,585 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:07,586 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:07,587 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:07,587 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:07,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:07,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:07,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:07,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:07,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:07,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:07,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017202802] [2020-09-21 11:31:07,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:07,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:31:07,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795277572] [2020-09-21 11:31:07,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:31:07,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:07,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:31:07,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:07,612 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 9 states. [2020-09-21 11:31:07,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:07,784 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-09-21 11:31:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:31:07,785 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-21 11:31:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:07,785 INFO L225 Difference]: With dead ends: 50 [2020-09-21 11:31:07,786 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 11:31:07,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 11:31:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-21 11:31:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 11:31:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-21 11:31:07,793 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2020-09-21 11:31:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:07,793 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-21 11:31:07,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:31:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-21 11:31:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:31:07,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:07,794 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:07,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:31:07,795 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:07,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1581729485, now seen corresponding path program 6 times [2020-09-21 11:31:07,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:07,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624232421] [2020-09-21 11:31:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:07,843 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:07,843 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:07,844 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:07,844 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:07,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:31:07,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:07,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:31:07,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:07,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:31:07,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:07,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:31:07,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:07,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:07,995 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:07,995 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:07,995 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:07,996 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:07,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:07,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:07,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:07,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:07,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:07,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:07,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:07,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:08,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624232421] [2020-09-21 11:31:08,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:08,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:31:08,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487711142] [2020-09-21 11:31:08,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:31:08,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:08,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:31:08,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:08,005 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2020-09-21 11:31:08,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:08,193 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-09-21 11:31:08,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:31:08,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-09-21 11:31:08,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:08,194 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:31:08,194 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 11:31:08,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:08,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 11:31:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-09-21 11:31:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 11:31:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-09-21 11:31:08,201 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-09-21 11:31:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:08,202 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-09-21 11:31:08,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:31:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-09-21 11:31:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 11:31:08,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:08,204 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:08,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:31:08,204 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:08,204 INFO L82 PathProgramCache]: Analyzing trace with hash 325117483, now seen corresponding path program 7 times [2020-09-21 11:31:08,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:08,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452778360] [2020-09-21 11:31:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:08,258 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:08,258 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:08,258 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:08,258 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:08,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 11:31:08,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:08,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:31:08,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:08,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:31:08,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:08,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:31:08,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:08,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:08,431 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:08,431 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:08,431 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:08,431 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:08,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:08,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:08,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:08,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:08,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:08,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:08,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:08,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:08,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452778360] [2020-09-21 11:31:08,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:08,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:31:08,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219975548] [2020-09-21 11:31:08,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:31:08,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:08,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:31:08,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:08,442 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2020-09-21 11:31:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:08,653 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-09-21 11:31:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:31:08,653 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-09-21 11:31:08,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:08,654 INFO L225 Difference]: With dead ends: 58 [2020-09-21 11:31:08,654 INFO L226 Difference]: Without dead ends: 35 [2020-09-21 11:31:08,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:31:08,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-21 11:31:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-21 11:31:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 11:31:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-21 11:31:08,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-09-21 11:31:08,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:08,661 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-21 11:31:08,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:31:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-21 11:31:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 11:31:08,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:08,663 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:08,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:31:08,663 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:08,664 INFO L82 PathProgramCache]: Analyzing trace with hash -393206263, now seen corresponding path program 8 times [2020-09-21 11:31:08,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:08,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132959217] [2020-09-21 11:31:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:08,720 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:08,721 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:08,721 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:08,721 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:08,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:31:08,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:08,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:31:08,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:08,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:31:08,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:08,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:31:08,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:08,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:08,943 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:08,943 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:08,943 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:08,943 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:08,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:08,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:08,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:08,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:08,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:08,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:08,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:08,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:08,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132959217] [2020-09-21 11:31:08,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:08,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:31:08,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419948109] [2020-09-21 11:31:08,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:31:08,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:08,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:31:08,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:31:08,954 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2020-09-21 11:31:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:09,220 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-09-21 11:31:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:31:09,220 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-09-21 11:31:09,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:09,221 INFO L225 Difference]: With dead ends: 62 [2020-09-21 11:31:09,221 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 11:31:09,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:31:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 11:31:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-21 11:31:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 11:31:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-21 11:31:09,228 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2020-09-21 11:31:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:09,229 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-21 11:31:09,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:31:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-21 11:31:09,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:31:09,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:09,230 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:09,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:31:09,230 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:09,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:09,230 INFO L82 PathProgramCache]: Analyzing trace with hash 787408487, now seen corresponding path program 9 times [2020-09-21 11:31:09,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:09,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868951452] [2020-09-21 11:31:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:09,290 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:09,291 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:09,291 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:09,291 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:09,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 11:31:09,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:09,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:31:09,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:31:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:31:09,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:09,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:09,518 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:09,518 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:09,518 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:09,522 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:09,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:09,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:09,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:31:09,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:09,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:09,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:09,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:09,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:09,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868951452] [2020-09-21 11:31:09,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:09,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:31:09,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171967085] [2020-09-21 11:31:09,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:31:09,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:31:09,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:31:09,543 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-09-21 11:31:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:09,814 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-09-21 11:31:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:31:09,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-21 11:31:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:09,816 INFO L225 Difference]: With dead ends: 66 [2020-09-21 11:31:09,816 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 11:31:09,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:31:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 11:31:09,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-21 11:31:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 11:31:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-21 11:31:09,828 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2020-09-21 11:31:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:09,829 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-21 11:31:09,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:31:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-21 11:31:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 11:31:09,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:09,832 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:09,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:31:09,832 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1486817093, now seen corresponding path program 10 times [2020-09-21 11:31:09,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:09,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13333170] [2020-09-21 11:31:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:09,928 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:09,928 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:09,928 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:09,929 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:09,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:31:09,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:09,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 11:31:09,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:09,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:31:09,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:09,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:31:09,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:10,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:10,232 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:10,232 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:10,232 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:10,232 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:10,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:10,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:10,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:10,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:10,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:10,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:10,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:10,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:10,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13333170] [2020-09-21 11:31:10,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:10,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:31:10,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572572884] [2020-09-21 11:31:10,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:31:10,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:10,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:31:10,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:31:10,245 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 14 states. [2020-09-21 11:31:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:10,573 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-09-21 11:31:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:31:10,573 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-09-21 11:31:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:10,574 INFO L225 Difference]: With dead ends: 70 [2020-09-21 11:31:10,575 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 11:31:10,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:31:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 11:31:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-09-21 11:31:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 11:31:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-09-21 11:31:10,583 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-09-21 11:31:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:10,583 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-09-21 11:31:10,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:31:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-09-21 11:31:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 11:31:10,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:10,584 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:10,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:31:10,585 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash -691378013, now seen corresponding path program 11 times [2020-09-21 11:31:10,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:10,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824754574] [2020-09-21 11:31:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:10,699 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:10,699 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:10,699 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:10,700 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:10,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 11:31:10,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:10,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 11:31:10,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:31:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:31:10,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:10,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:10,965 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:10,966 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:10,966 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:10,966 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:10,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:10,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:10,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:10,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:10,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:10,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:10,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:10,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:10,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824754574] [2020-09-21 11:31:10,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:10,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:31:10,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931392924] [2020-09-21 11:31:10,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:31:10,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:10,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:31:10,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:31:10,976 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 15 states. [2020-09-21 11:31:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:11,363 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-09-21 11:31:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:31:11,364 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-09-21 11:31:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:11,364 INFO L225 Difference]: With dead ends: 74 [2020-09-21 11:31:11,365 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 11:31:11,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:31:11,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 11:31:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-09-21 11:31:11,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 11:31:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-21 11:31:11,372 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2020-09-21 11:31:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:11,372 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-21 11:31:11,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:31:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-21 11:31:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 11:31:11,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:11,373 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:11,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:31:11,374 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2007165569, now seen corresponding path program 12 times [2020-09-21 11:31:11,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:11,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824398331] [2020-09-21 11:31:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:11,445 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:11,445 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:11,445 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:11,445 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:11,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:31:11,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:11,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:31:11,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:31:11,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:11,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:31:11,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:11,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:11,712 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:11,712 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:11,712 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:11,713 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:11,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:11,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:11,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:11,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:11,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:11,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824398331] [2020-09-21 11:31:11,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:11,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 11:31:11,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159018797] [2020-09-21 11:31:11,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 11:31:11,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:11,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 11:31:11,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:31:11,723 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2020-09-21 11:31:12,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:12,141 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-09-21 11:31:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 11:31:12,142 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-09-21 11:31:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:12,142 INFO L225 Difference]: With dead ends: 78 [2020-09-21 11:31:12,142 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 11:31:12,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:31:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 11:31:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-09-21 11:31:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 11:31:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-21 11:31:12,149 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-09-21 11:31:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:12,149 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-21 11:31:12,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 11:31:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-21 11:31:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 11:31:12,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:12,150 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:12,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 11:31:12,151 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:12,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:12,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1147301087, now seen corresponding path program 13 times [2020-09-21 11:31:12,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:12,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762784289] [2020-09-21 11:31:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:12,225 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:12,225 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:12,225 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:12,225 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:12,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 11:31:12,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:12,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-21 11:31:12,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:12,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:31:12,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:12,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 11:31:12,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:12,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:12,528 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:12,528 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:12,531 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:12,531 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:12,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:12,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:12,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:31:12,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:12,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:12,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:12,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:12,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:12,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762784289] [2020-09-21 11:31:12,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:12,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 11:31:12,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005938761] [2020-09-21 11:31:12,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 11:31:12,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:12,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 11:31:12,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:31:12,554 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 17 states. [2020-09-21 11:31:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:13,023 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-09-21 11:31:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 11:31:13,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-09-21 11:31:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:13,024 INFO L225 Difference]: With dead ends: 82 [2020-09-21 11:31:13,025 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 11:31:13,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:31:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 11:31:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-09-21 11:31:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:31:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-21 11:31:13,031 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2020-09-21 11:31:13,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:13,032 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-21 11:31:13,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 11:31:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-21 11:31:13,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 11:31:13,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:13,033 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:13,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 11:31:13,033 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:13,034 INFO L82 PathProgramCache]: Analyzing trace with hash -548745283, now seen corresponding path program 14 times [2020-09-21 11:31:13,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:13,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205445767] [2020-09-21 11:31:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,147 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,147 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,147 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,148 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:31:13,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-21 11:31:13,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:31:13,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:13,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:31:13,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:13,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,502 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,502 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,503 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,503 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:13,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:13,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:13,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:13,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:13,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:13,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205445767] [2020-09-21 11:31:13,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:13,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 11:31:13,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806656521] [2020-09-21 11:31:13,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 11:31:13,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:13,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 11:31:13,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:31:13,514 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 18 states. [2020-09-21 11:31:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:14,093 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-09-21 11:31:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 11:31:14,094 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-09-21 11:31:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:14,095 INFO L225 Difference]: With dead ends: 86 [2020-09-21 11:31:14,095 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 11:31:14,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:31:14,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 11:31:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-21 11:31:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 11:31:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-21 11:31:14,102 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-09-21 11:31:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:14,102 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-21 11:31:14,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 11:31:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-21 11:31:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 11:31:14,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:14,103 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:14,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 11:31:14,104 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1638265627, now seen corresponding path program 15 times [2020-09-21 11:31:14,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:14,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928087388] [2020-09-21 11:31:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,194 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,194 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,194 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,195 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-21 11:31:14,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-21 11:31:14,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:31:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-21 11:31:14,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:14,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,578 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,578 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,579 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,579 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:14,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:14,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:14,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:14,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:14,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:14,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928087388] [2020-09-21 11:31:14,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:14,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:31:14,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093761663] [2020-09-21 11:31:14,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:31:14,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:14,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:31:14,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:31:14,592 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2020-09-21 11:31:15,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:15,286 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2020-09-21 11:31:15,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 11:31:15,287 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-09-21 11:31:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:15,288 INFO L225 Difference]: With dead ends: 90 [2020-09-21 11:31:15,288 INFO L226 Difference]: Without dead ends: 51 [2020-09-21 11:31:15,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:31:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-21 11:31:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-09-21 11:31:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 11:31:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-09-21 11:31:15,298 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2020-09-21 11:31:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:15,299 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-09-21 11:31:15,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:31:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-09-21 11:31:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 11:31:15,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:15,301 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:15,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 11:31:15,301 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1178224903, now seen corresponding path program 16 times [2020-09-21 11:31:15,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:15,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617602724] [2020-09-21 11:31:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:15,401 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:15,401 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:15,401 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:15,401 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:15,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 11:31:15,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:15,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 11:31:15,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:31:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 11:31:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:15,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:15,829 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:15,829 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:15,829 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:15,830 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:15,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:15,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:15,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:15,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:15,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:15,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617602724] [2020-09-21 11:31:15,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:15,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 11:31:15,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706023854] [2020-09-21 11:31:15,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 11:31:15,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 11:31:15,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:31:15,841 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 20 states. [2020-09-21 11:31:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:16,561 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-09-21 11:31:16,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 11:31:16,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-09-21 11:31:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:16,563 INFO L225 Difference]: With dead ends: 94 [2020-09-21 11:31:16,563 INFO L226 Difference]: Without dead ends: 53 [2020-09-21 11:31:16,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:31:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-21 11:31:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-09-21 11:31:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-21 11:31:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-09-21 11:31:16,569 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2020-09-21 11:31:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:16,569 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-09-21 11:31:16,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 11:31:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-09-21 11:31:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 11:31:16,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:16,570 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:16,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 11:31:16,571 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:16,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:16,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1996227753, now seen corresponding path program 17 times [2020-09-21 11:31:16,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:16,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411367955] [2020-09-21 11:31:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:16,672 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:16,672 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:16,673 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:16,673 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:16,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-21 11:31:16,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:16,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-21 11:31:16,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:31:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 11:31:16,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:17,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:17,085 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:17,085 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:17,085 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:17,086 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:17,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:17,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:17,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:17,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:17,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:17,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:17,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:17,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:17,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411367955] [2020-09-21 11:31:17,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:17,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 11:31:17,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231759744] [2020-09-21 11:31:17,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 11:31:17,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:17,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 11:31:17,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:31:17,097 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 21 states. [2020-09-21 11:31:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:17,868 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-09-21 11:31:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 11:31:17,868 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-09-21 11:31:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:17,869 INFO L225 Difference]: With dead ends: 98 [2020-09-21 11:31:17,870 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 11:31:17,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:31:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 11:31:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-21 11:31:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-21 11:31:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-21 11:31:17,876 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2020-09-21 11:31:17,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:17,876 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-21 11:31:17,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 11:31:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-21 11:31:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 11:31:17,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:17,877 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:17,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 11:31:17,877 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2117951435, now seen corresponding path program 18 times [2020-09-21 11:31:17,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:17,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249975961] [2020-09-21 11:31:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:17,990 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:17,990 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:17,990 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:17,990 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:17,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:31:17,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:17,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-21 11:31:17,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:17,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:31:17,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:17,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 11:31:17,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:18,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:18,479 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:18,480 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:18,480 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:18,480 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:18,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:18,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:18,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:18,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:18,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:18,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:18,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:18,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:18,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249975961] [2020-09-21 11:31:18,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:18,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 11:31:18,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214444149] [2020-09-21 11:31:18,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 11:31:18,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 11:31:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:31:18,491 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 22 states. [2020-09-21 11:31:19,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:19,345 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-09-21 11:31:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:31:19,346 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-09-21 11:31:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:19,347 INFO L225 Difference]: With dead ends: 102 [2020-09-21 11:31:19,347 INFO L226 Difference]: Without dead ends: 57 [2020-09-21 11:31:19,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:31:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-21 11:31:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-21 11:31:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 11:31:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-09-21 11:31:19,353 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2020-09-21 11:31:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:19,354 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-09-21 11:31:19,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 11:31:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-09-21 11:31:19,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 11:31:19,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:19,354 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:19,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 11:31:19,355 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:19,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1164674451, now seen corresponding path program 19 times [2020-09-21 11:31:19,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:19,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552392399] [2020-09-21 11:31:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:19,474 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:19,474 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:19,474 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:19,474 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:19,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-21 11:31:19,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:19,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-21 11:31:19,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:19,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:31:19,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:19,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-21 11:31:19,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:19,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:19,983 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:19,983 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:19,984 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:19,984 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:19,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:19,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:19,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:19,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:19,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:19,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:19,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:19,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:20,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552392399] [2020-09-21 11:31:20,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:20,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 11:31:20,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737739032] [2020-09-21 11:31:20,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 11:31:20,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:20,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 11:31:20,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:31:20,004 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 23 states. [2020-09-21 11:31:21,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:21,004 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2020-09-21 11:31:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 11:31:21,010 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-09-21 11:31:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:21,011 INFO L225 Difference]: With dead ends: 106 [2020-09-21 11:31:21,011 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 11:31:21,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:31:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 11:31:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-09-21 11:31:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-21 11:31:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-09-21 11:31:21,017 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2020-09-21 11:31:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:21,017 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-09-21 11:31:21,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 11:31:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-09-21 11:31:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 11:31:21,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:21,018 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:21,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 11:31:21,018 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:21,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1032811663, now seen corresponding path program 20 times [2020-09-21 11:31:21,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:21,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370055586] [2020-09-21 11:31:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:21,132 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:21,132 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:21,132 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:21,132 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:21,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-21 11:31:21,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:21,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-21 11:31:21,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:21,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-21 11:31:21,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:21,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-21 11:31:21,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:21,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:21,695 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:21,695 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:21,695 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:21,695 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:21,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:21,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:21,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:21,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:21,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:21,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:21,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:21,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:21,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370055586] [2020-09-21 11:31:21,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:21,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 11:31:21,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376968107] [2020-09-21 11:31:21,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 11:31:21,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:21,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 11:31:21,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:31:21,709 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 24 states. [2020-09-21 11:31:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:22,803 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2020-09-21 11:31:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 11:31:22,804 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-09-21 11:31:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:22,805 INFO L225 Difference]: With dead ends: 110 [2020-09-21 11:31:22,805 INFO L226 Difference]: Without dead ends: 61 [2020-09-21 11:31:22,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:31:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-21 11:31:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-21 11:31:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 11:31:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-21 11:31:22,814 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2020-09-21 11:31:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:22,815 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-21 11:31:22,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 11:31:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-21 11:31:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 11:31:22,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:22,820 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:22,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 11:31:22,821 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash 306942415, now seen corresponding path program 21 times [2020-09-21 11:31:22,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:22,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339548653] [2020-09-21 11:31:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:22,982 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:22,982 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:22,983 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:22,983 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:22,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 11:31:22,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:22,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-21 11:31:22,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:22,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 11:31:22,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:22,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-21 11:31:22,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:23,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:23,651 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:23,651 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:23,651 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:23,653 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:23,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:23,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:23,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:23,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:23,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:23,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339548653] [2020-09-21 11:31:23,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:23,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 11:31:23,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854443393] [2020-09-21 11:31:23,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 11:31:23,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:23,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 11:31:23,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:31:23,665 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 25 states. [2020-09-21 11:31:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:24,760 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-09-21 11:31:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 11:31:24,761 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-09-21 11:31:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:24,761 INFO L225 Difference]: With dead ends: 114 [2020-09-21 11:31:24,762 INFO L226 Difference]: Without dead ends: 63 [2020-09-21 11:31:24,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:31:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-21 11:31:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-09-21 11:31:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-21 11:31:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-09-21 11:31:24,766 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-09-21 11:31:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:24,766 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-09-21 11:31:24,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 11:31:24,767 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-09-21 11:31:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-21 11:31:24,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:24,767 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:24,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 11:31:24,768 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:24,769 INFO L82 PathProgramCache]: Analyzing trace with hash -679577427, now seen corresponding path program 22 times [2020-09-21 11:31:24,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:24,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125078221] [2020-09-21 11:31:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:24,926 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:24,926 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:24,926 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:24,927 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:24,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 11:31:24,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:24,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 11:31:24,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-21 11:31:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-21 11:31:24,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:25,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,603 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,603 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,603 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,603 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:25,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:25,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:25,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:25,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:25,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:25,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125078221] [2020-09-21 11:31:25,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:25,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 11:31:25,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441034372] [2020-09-21 11:31:25,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 11:31:25,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:25,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 11:31:25,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:31:25,614 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 26 states. [2020-09-21 11:31:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:26,850 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-09-21 11:31:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 11:31:26,853 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-09-21 11:31:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:26,854 INFO L225 Difference]: With dead ends: 118 [2020-09-21 11:31:26,854 INFO L226 Difference]: Without dead ends: 65 [2020-09-21 11:31:26,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:31:26,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-21 11:31:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-21 11:31:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-21 11:31:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-09-21 11:31:26,861 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2020-09-21 11:31:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:26,862 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-09-21 11:31:26,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 11:31:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-09-21 11:31:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 11:31:26,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:26,863 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:26,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 11:31:26,863 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:26,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:26,864 INFO L82 PathProgramCache]: Analyzing trace with hash 462626827, now seen corresponding path program 23 times [2020-09-21 11:31:26,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:26,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676090050] [2020-09-21 11:31:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,038 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,039 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,039 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,039 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-21 11:31:27,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-21 11:31:27,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-21 11:31:27,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:27,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-21 11:31:27,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,739 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,739 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,739 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,740 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676090050] [2020-09-21 11:31:27,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:27,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 11:31:27,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182012853] [2020-09-21 11:31:27,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 11:31:27,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 11:31:27,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:31:27,753 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 27 states. [2020-09-21 11:31:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:29,134 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2020-09-21 11:31:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 11:31:29,135 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-09-21 11:31:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:29,135 INFO L225 Difference]: With dead ends: 122 [2020-09-21 11:31:29,135 INFO L226 Difference]: Without dead ends: 67 [2020-09-21 11:31:29,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:31:29,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-21 11:31:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-21 11:31:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 11:31:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-21 11:31:29,141 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-09-21 11:31:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:29,141 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-21 11:31:29,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 11:31:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-21 11:31:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 11:31:29,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:29,142 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:29,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 11:31:29,142 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:29,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1390712855, now seen corresponding path program 24 times [2020-09-21 11:31:29,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:29,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239888375] [2020-09-21 11:31:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,297 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,297 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,298 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,298 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 11:31:29,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-21 11:31:29,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 11:31:29,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:29,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-21 11:31:29,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,000 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,000 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,000 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,001 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:30,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:30,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:30,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:30,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:30,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:30,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239888375] [2020-09-21 11:31:30,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:30,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 11:31:30,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176310351] [2020-09-21 11:31:30,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 11:31:30,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:30,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 11:31:30,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:31:30,013 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 28 states. [2020-09-21 11:31:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:31,494 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2020-09-21 11:31:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-21 11:31:31,496 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-09-21 11:31:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:31,497 INFO L225 Difference]: With dead ends: 126 [2020-09-21 11:31:31,497 INFO L226 Difference]: Without dead ends: 69 [2020-09-21 11:31:31,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:31:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-21 11:31:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-09-21 11:31:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-21 11:31:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-09-21 11:31:31,502 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2020-09-21 11:31:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:31,502 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-09-21 11:31:31,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 11:31:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-09-21 11:31:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 11:31:31,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:31,503 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:31,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 11:31:31,504 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash -38719417, now seen corresponding path program 25 times [2020-09-21 11:31:31,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:31,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755812673] [2020-09-21 11:31:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:31,656 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:31,656 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:31,656 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:31,657 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:31,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 11:31:31,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:31,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-21 11:31:31,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:31,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-21 11:31:31,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:31,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-21 11:31:31,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:32,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:32,423 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:32,423 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:32,424 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:32,424 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:32,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:32,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:32,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:32,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:32,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:32,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755812673] [2020-09-21 11:31:32,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:32,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 11:31:32,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936557] [2020-09-21 11:31:32,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 11:31:32,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 11:31:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:31:32,439 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 29 states. [2020-09-21 11:31:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:34,028 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2020-09-21 11:31:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 11:31:34,028 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-09-21 11:31:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:34,029 INFO L225 Difference]: With dead ends: 130 [2020-09-21 11:31:34,029 INFO L226 Difference]: Without dead ends: 71 [2020-09-21 11:31:34,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:31:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-21 11:31:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-09-21 11:31:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-21 11:31:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-09-21 11:31:34,039 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2020-09-21 11:31:34,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:34,039 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-09-21 11:31:34,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 11:31:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-09-21 11:31:34,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-21 11:31:34,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:34,040 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:34,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 11:31:34,040 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:34,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2146851109, now seen corresponding path program 26 times [2020-09-21 11:31:34,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:34,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771792637] [2020-09-21 11:31:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:34,232 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:34,238 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:34,238 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:34,238 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:34,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-21 11:31:34,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:34,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-21 11:31:34,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-21 11:31:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 11:31:34,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:35,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:35,168 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:35,168 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:35,169 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:35,169 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:35,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:35,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:35,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:35,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:35,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:35,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771792637] [2020-09-21 11:31:35,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:35,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 11:31:35,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545464517] [2020-09-21 11:31:35,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 11:31:35,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:35,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 11:31:35,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:31:35,181 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 30 states. [2020-09-21 11:31:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:36,920 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2020-09-21 11:31:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-21 11:31:36,927 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-09-21 11:31:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:36,928 INFO L225 Difference]: With dead ends: 134 [2020-09-21 11:31:36,928 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 11:31:36,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:31:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 11:31:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-21 11:31:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-21 11:31:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-21 11:31:36,935 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-09-21 11:31:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:36,935 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-21 11:31:36,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 11:31:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-21 11:31:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 11:31:36,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:36,936 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:36,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 11:31:36,936 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2053848445, now seen corresponding path program 27 times [2020-09-21 11:31:36,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:36,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527756168] [2020-09-21 11:31:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:37,111 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:37,111 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:37,111 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:37,112 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:37,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-21 11:31:37,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:37,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-21 11:31:37,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-21 11:31:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-21 11:31:37,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:37,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:37,981 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:37,981 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:37,982 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:37,982 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:37,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:37,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:37,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:37,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:37,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:37,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:37,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:37,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:37,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527756168] [2020-09-21 11:31:37,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:37,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-21 11:31:37,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151610278] [2020-09-21 11:31:37,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-21 11:31:37,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:37,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-21 11:31:37,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:31:37,993 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 31 states. [2020-09-21 11:31:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:39,830 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2020-09-21 11:31:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 11:31:39,831 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-09-21 11:31:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:39,832 INFO L225 Difference]: With dead ends: 138 [2020-09-21 11:31:39,832 INFO L226 Difference]: Without dead ends: 75 [2020-09-21 11:31:39,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:31:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-21 11:31:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-21 11:31:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-21 11:31:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-09-21 11:31:39,838 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2020-09-21 11:31:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:39,838 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-09-21 11:31:39,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-21 11:31:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-09-21 11:31:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-21 11:31:39,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:39,839 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:39,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 11:31:39,840 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:39,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:39,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1656861599, now seen corresponding path program 28 times [2020-09-21 11:31:39,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:39,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658274064] [2020-09-21 11:31:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:40,015 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:40,015 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:40,016 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:40,016 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:40,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-21 11:31:40,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:40,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-21 11:31:40,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-21 11:31:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-21 11:31:40,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:41,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:41,180 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:41,181 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:41,182 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:41,182 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:41,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:41,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:41,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:41,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:41,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:41,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658274064] [2020-09-21 11:31:41,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:41,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 11:31:41,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130259969] [2020-09-21 11:31:41,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 11:31:41,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:41,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 11:31:41,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:31:41,213 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 32 states. [2020-09-21 11:31:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:43,282 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2020-09-21 11:31:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-21 11:31:43,283 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-09-21 11:31:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:43,284 INFO L225 Difference]: With dead ends: 142 [2020-09-21 11:31:43,284 INFO L226 Difference]: Without dead ends: 77 [2020-09-21 11:31:43,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:31:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-21 11:31:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-09-21 11:31:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-21 11:31:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-09-21 11:31:43,292 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2020-09-21 11:31:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:43,293 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-09-21 11:31:43,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 11:31:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-09-21 11:31:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-21 11:31:43,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:43,294 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:43,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-21 11:31:43,294 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1890375359, now seen corresponding path program 29 times [2020-09-21 11:31:43,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:43,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396284788] [2020-09-21 11:31:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:43,532 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:43,532 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:43,533 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:43,533 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:43,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-21 11:31:43,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:43,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-21 11:31:43,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-21 11:31:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-21 11:31:43,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:44,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:44,565 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:44,566 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:44,566 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:44,566 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:44,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:44,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:44,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:44,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:44,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:44,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:44,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:44,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:44,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396284788] [2020-09-21 11:31:44,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:44,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-21 11:31:44,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063602408] [2020-09-21 11:31:44,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-21 11:31:44,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:44,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-21 11:31:44,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:31:44,581 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 33 states. [2020-09-21 11:31:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:46,715 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2020-09-21 11:31:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-21 11:31:46,717 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-09-21 11:31:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:46,718 INFO L225 Difference]: With dead ends: 146 [2020-09-21 11:31:46,718 INFO L226 Difference]: Without dead ends: 79 [2020-09-21 11:31:46,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:31:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-21 11:31:46,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-09-21 11:31:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 11:31:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-21 11:31:46,724 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2020-09-21 11:31:46,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:46,724 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-21 11:31:46,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-21 11:31:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-21 11:31:46,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-21 11:31:46,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:46,725 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:46,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-21 11:31:46,726 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:46,726 INFO L82 PathProgramCache]: Analyzing trace with hash 581058973, now seen corresponding path program 30 times [2020-09-21 11:31:46,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:46,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505269914] [2020-09-21 11:31:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:46,909 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:46,909 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:46,909 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:46,910 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:46,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-21 11:31:46,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:46,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-09-21 11:31:46,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-21 11:31:46,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:46,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-21 11:31:46,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:48,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:48,063 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:48,063 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:48,064 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:48,064 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:48,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:48,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:48,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:48,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:48,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:48,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:48,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:48,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:48,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505269914] [2020-09-21 11:31:48,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:48,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-21 11:31:48,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182231282] [2020-09-21 11:31:48,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-21 11:31:48,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-21 11:31:48,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:31:48,077 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 34 states. [2020-09-21 11:31:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:50,386 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2020-09-21 11:31:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-21 11:31:50,387 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-09-21 11:31:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:50,388 INFO L225 Difference]: With dead ends: 150 [2020-09-21 11:31:50,388 INFO L226 Difference]: Without dead ends: 81 [2020-09-21 11:31:50,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:31:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-21 11:31:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-09-21 11:31:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-21 11:31:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-21 11:31:50,394 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2020-09-21 11:31:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:50,394 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-21 11:31:50,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-21 11:31:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-21 11:31:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-21 11:31:50,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:50,395 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:50,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-21 11:31:50,396 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:50,396 INFO L82 PathProgramCache]: Analyzing trace with hash 753429755, now seen corresponding path program 31 times [2020-09-21 11:31:50,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:50,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112986694] [2020-09-21 11:31:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:50,587 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:50,587 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:50,587 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:50,587 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:50,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-21 11:31:50,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:50,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-21 11:31:50,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:50,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-09-21 11:31:50,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:50,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-21 11:31:50,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:51,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:51,819 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:51,820 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:51,820 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:51,820 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:51,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:51,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:51,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:51,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:51,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:51,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:51,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:51,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:51,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112986694] [2020-09-21 11:31:51,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:51,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-21 11:31:51,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486069869] [2020-09-21 11:31:51,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-21 11:31:51,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:51,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-21 11:31:51,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:31:51,836 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 35 states. [2020-09-21 11:31:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:54,371 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2020-09-21 11:31:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-21 11:31:54,372 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-09-21 11:31:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:54,373 INFO L225 Difference]: With dead ends: 154 [2020-09-21 11:31:54,373 INFO L226 Difference]: Without dead ends: 83 [2020-09-21 11:31:54,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:31:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-21 11:31:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-09-21 11:31:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-21 11:31:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-09-21 11:31:54,378 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2020-09-21 11:31:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:54,379 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-09-21 11:31:54,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-21 11:31:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-09-21 11:31:54,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 11:31:54,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:54,380 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:54,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-21 11:31:54,380 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:54,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1101973287, now seen corresponding path program 32 times [2020-09-21 11:31:54,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:54,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503474482] [2020-09-21 11:31:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:54,601 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:54,601 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:54,601 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:54,602 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:54,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-21 11:31:54,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:54,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-21 11:31:54,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-21 11:31:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-21 11:31:54,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:55,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:55,920 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:55,920 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:55,920 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:55,921 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:55,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:55,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:55,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:55,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:55,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:55,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:55,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:55,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:55,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503474482] [2020-09-21 11:31:55,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:55,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-21 11:31:55,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188048049] [2020-09-21 11:31:55,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-21 11:31:55,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-21 11:31:55,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:31:55,937 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 36 states. [2020-09-21 11:31:58,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:58,654 INFO L93 Difference]: Finished difference Result 158 states and 163 transitions. [2020-09-21 11:31:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-21 11:31:58,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-09-21 11:31:58,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:58,656 INFO L225 Difference]: With dead ends: 158 [2020-09-21 11:31:58,656 INFO L226 Difference]: Without dead ends: 85 [2020-09-21 11:31:58,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 11:31:58,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-21 11:31:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-09-21 11:31:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-21 11:31:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-09-21 11:31:58,664 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2020-09-21 11:31:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:58,665 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-09-21 11:31:58,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-21 11:31:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-09-21 11:31:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-21 11:31:58,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:58,666 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:58,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-21 11:31:58,666 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:58,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1732868809, now seen corresponding path program 33 times [2020-09-21 11:31:58,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:58,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797917967] [2020-09-21 11:31:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:58,916 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:58,916 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:58,916 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:58,916 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:58,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-21 11:31:58,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:58,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-09-21 11:31:58,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:58,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-09-21 11:31:58,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:58,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-21 11:31:58,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0