/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/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:32:00,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:32:00,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:32:00,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:32:00,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:32:00,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:32:00,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:32:00,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:32:00,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:32:00,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:32:00,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:32:00,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:32:00,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:32:00,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:32:00,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:32:00,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:32:00,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:32:00,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:32:00,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:32:00,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:32:00,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:32:00,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:32:00,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:32:00,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:32:00,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:32:00,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:32:00,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:32:00,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:32:00,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:32:00,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:32:00,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:32:00,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:32:00,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:32:00,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:32:00,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:32:00,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:32:00,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:32:00,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:32:00,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:32:00,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:32:00,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:32:00,760 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 11:32:00,786 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:32:00,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:32:00,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:32:00,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:32:00,788 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:32:00,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:32:00,789 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:32:00,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:32:00,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:32:00,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:32:00,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:32:00,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:32:00,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:32:00,790 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:32:00,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:32:00,790 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:32:00,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:32:00,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:32:00,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:32:00,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:32:00,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:32:00,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:00,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:32:00,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:32:00,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:32:00,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:32:00,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:32:00,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:32:00,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:32:00,793 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 11:32:01,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:32:01,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:32:01,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:32:01,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:32:01,295 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:32:01,297 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-21 11:32:01,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cd8d2d25/c83030da09e84cf5be038bd9fc1280a4/FLAGdcd9c2194 [2020-09-21 11:32:01,924 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:32:01,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-21 11:32:01,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cd8d2d25/c83030da09e84cf5be038bd9fc1280a4/FLAGdcd9c2194 [2020-09-21 11:32:02,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cd8d2d25/c83030da09e84cf5be038bd9fc1280a4 [2020-09-21 11:32:02,297 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:32:02,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:32:02,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:02,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:32:02,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:32:02,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:02" (1/1) ... [2020-09-21 11:32:02,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21af3704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02, skipping insertion in model container [2020-09-21 11:32:02,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:02" (1/1) ... [2020-09-21 11:32:02,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:32:02,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:32:02,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:02,575 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:32:02,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:02,614 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:32:02,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02 WrapperNode [2020-09-21 11:32:02,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:02,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:32:02,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:32:02,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:32:02,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02" (1/1) ... [2020-09-21 11:32:02,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02" (1/1) ... [2020-09-21 11:32:02,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02" (1/1) ... [2020-09-21 11:32:02,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02" (1/1) ... [2020-09-21 11:32:02,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02" (1/1) ... [2020-09-21 11:32:02,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02" (1/1) ... [2020-09-21 11:32:02,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02" (1/1) ... [2020-09-21 11:32:02,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:32:02,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:32:02,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:32:02,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:32:02,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:02,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:32:02,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:32:02,800 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:32:02,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:32:02,800 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:32:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:32:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:32:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:32:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:32:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:32:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:32:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:32:02,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:32:03,022 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:32:03,023 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:32:03,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:03 BoogieIcfgContainer [2020-09-21 11:32:03,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:32:03,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:32:03,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:32:03,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:32:03,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:32:02" (1/3) ... [2020-09-21 11:32:03,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7822a170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:03, skipping insertion in model container [2020-09-21 11:32:03,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:02" (2/3) ... [2020-09-21 11:32:03,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7822a170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:03, skipping insertion in model container [2020-09-21 11:32:03,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:03" (3/3) ... [2020-09-21 11:32:03,038 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-21 11:32:03,050 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:32:03,061 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:32:03,110 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:32:03,182 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:32:03,182 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:32:03,183 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:32:03,183 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:32:03,183 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:32:03,183 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:32:03,184 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:32:03,184 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:32:03,209 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 11:32:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:32:03,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:03,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:03,218 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1915647303, now seen corresponding path program 1 times [2020-09-21 11:32:03,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:03,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198844099] [2020-09-21 11:32:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:03,344 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:03,345 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:03,345 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:03,345 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:03,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:32:03,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:03,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:32:03,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:03,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:03,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:03,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:03,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:03,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:03,375 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:03,376 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:03,376 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:03,376 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:03,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:03,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:03,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:03,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:03,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:03,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:03,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:03,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:03,384 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 11:32:03,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198844099] [2020-09-21 11:32:03,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:03,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:32:03,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735296847] [2020-09-21 11:32:03,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:32:03,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:03,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:32:03,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:32:03,417 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-09-21 11:32:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:03,442 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-09-21 11:32:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:32:03,444 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 11:32:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:03,453 INFO L225 Difference]: With dead ends: 32 [2020-09-21 11:32:03,453 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 11:32:03,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:32:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 11:32:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 11:32:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 11:32:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-21 11:32:03,499 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-09-21 11:32:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:03,500 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-21 11:32:03,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:32:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-21 11:32:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 11:32:03,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:03,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:03,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:32:03,502 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2084433522, now seen corresponding path program 1 times [2020-09-21 11:32:03,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:03,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001894503] [2020-09-21 11:32:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:03,572 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:03,572 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:03,572 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:03,573 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:03,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 11:32:03,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:03,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:32:03,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:03,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:03,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:03,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:32:03,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:03,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:03,715 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:03,716 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:03,716 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:03,716 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:03,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:03,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:03,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:32:03,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:03,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:32:03,728 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 11:32:03,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001894503] [2020-09-21 11:32:03,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:03,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:03,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31383611] [2020-09-21 11:32:03,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:03,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:03,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:03,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:03,742 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-09-21 11:32:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:03,829 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-09-21 11:32:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:03,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-21 11:32:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:03,831 INFO L225 Difference]: With dead ends: 21 [2020-09-21 11:32:03,832 INFO L226 Difference]: Without dead ends: 16 [2020-09-21 11:32:03,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-21 11:32:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-21 11:32:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 11:32:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-09-21 11:32:03,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-09-21 11:32:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:03,844 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-09-21 11:32:03,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-09-21 11:32:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 11:32:03,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:03,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:03,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:32:03,847 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:03,848 INFO L82 PathProgramCache]: Analyzing trace with hash 249504553, now seen corresponding path program 1 times [2020-09-21 11:32:03,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:03,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960641005] [2020-09-21 11:32:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:03,948 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:03,949 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:03,949 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:03,950 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:03,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 11:32:03,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:03,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 11:32:03,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:32:03,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:03,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:32:03,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:04,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:04,048 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:04,049 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:04,049 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:04,051 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:04,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:04,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:04,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:32:04,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:04,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:04,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:04,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:04,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:04,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960641005] [2020-09-21 11:32:04,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:04,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:32:04,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694767048] [2020-09-21 11:32:04,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:32:04,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:04,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:32:04,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:04,067 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-09-21 11:32:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:04,129 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-09-21 11:32:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:32:04,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-21 11:32:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:04,131 INFO L225 Difference]: With dead ends: 24 [2020-09-21 11:32:04,131 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 11:32:04,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 11:32:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-21 11:32:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 11:32:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-09-21 11:32:04,137 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2020-09-21 11:32:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:04,137 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-09-21 11:32:04,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:32:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-09-21 11:32:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:32:04,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:04,139 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:04,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:32:04,139 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:04,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2070634734, now seen corresponding path program 2 times [2020-09-21 11:32:04,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:04,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539558045] [2020-09-21 11:32:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:04,179 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:04,179 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:04,179 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:04,179 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:04,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:32:04,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:04,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:32:04,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:04,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:32:04,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:04,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:32:04,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:04,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:04,280 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:04,280 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:04,280 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:04,281 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:04,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:04,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:04,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:04,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:04,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:04,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:04,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:04,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539558045] [2020-09-21 11:32:04,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:04,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:32:04,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055926702] [2020-09-21 11:32:04,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:32:04,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:04,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:32:04,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:04,289 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-09-21 11:32:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:04,374 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-09-21 11:32:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:32:04,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-09-21 11:32:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:04,376 INFO L225 Difference]: With dead ends: 27 [2020-09-21 11:32:04,376 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 11:32:04,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:32:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 11:32:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-21 11:32:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 11:32:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-09-21 11:32:04,384 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 18 [2020-09-21 11:32:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:04,384 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-09-21 11:32:04,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:32:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-09-21 11:32:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:32:04,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:04,386 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:04,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:32:04,386 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:04,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1863528073, now seen corresponding path program 3 times [2020-09-21 11:32:04,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:04,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609793271] [2020-09-21 11:32:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:04,444 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:04,444 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:04,445 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:04,445 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:04,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:32:04,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:04,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 11:32:04,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:04,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:32:04,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:04,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:32:04,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:32:04,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:04,593 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:04,593 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:04,594 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:04,594 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:04,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:04,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:04,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:04,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:04,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:04,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609793271] [2020-09-21 11:32:04,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:04,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:32:04,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218676922] [2020-09-21 11:32:04,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:32:04,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:32:04,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:04,601 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-09-21 11:32:04,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:04,698 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-09-21 11:32:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:32:04,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-09-21 11:32:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:04,700 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:32:04,700 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 11:32:04,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:32:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 11:32:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 11:32:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 11:32:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-09-21 11:32:04,707 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 21 [2020-09-21 11:32:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:04,708 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-09-21 11:32:04,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:32:04,708 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-09-21 11:32:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:32:04,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:04,709 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:04,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:32:04,710 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:04,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:04,711 INFO L82 PathProgramCache]: Analyzing trace with hash -854829134, now seen corresponding path program 4 times [2020-09-21 11:32:04,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:04,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541387159] [2020-09-21 11:32:04,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:04,765 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:04,765 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:04,766 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:04,766 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:04,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:32:04,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:04,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 11:32:04,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:04,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:32:04,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:04,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 11:32:04,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:04,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:04,887 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:04,887 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:04,887 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:04,889 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:04,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:04,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:04,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:32:04,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:04,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:04,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:04,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:04,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:32:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:04,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541387159] [2020-09-21 11:32:04,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:04,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:32:04,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974093844] [2020-09-21 11:32:04,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:32:04,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:04,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:32:04,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:04,903 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2020-09-21 11:32:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:05,016 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-09-21 11:32:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:32:05,017 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-21 11:32:05,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:05,017 INFO L225 Difference]: With dead ends: 33 [2020-09-21 11:32:05,018 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 11:32:05,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:32:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 11:32:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-21 11:32:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 11:32:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-09-21 11:32:05,031 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2020-09-21 11:32:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:05,032 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-09-21 11:32:05,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:32:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-09-21 11:32:05,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:32:05,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:05,034 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:05,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:32:05,034 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:05,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1826016791, now seen corresponding path program 5 times [2020-09-21 11:32:05,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:05,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565317407] [2020-09-21 11:32:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:05,123 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:05,124 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:05,124 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:05,124 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:05,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 11:32:05,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:05,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-21 11:32:05,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:32:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:32:05,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:05,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:05,269 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:05,269 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:05,269 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:05,270 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:05,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:05,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:05,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:05,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:05,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:05,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565317407] [2020-09-21 11:32:05,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:05,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:32:05,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648529908] [2020-09-21 11:32:05,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:32:05,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:05,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:32:05,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:32:05,277 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 10 states. [2020-09-21 11:32:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:05,385 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-09-21 11:32:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:32:05,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-09-21 11:32:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:05,387 INFO L225 Difference]: With dead ends: 36 [2020-09-21 11:32:05,387 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 11:32:05,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 11:32:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-21 11:32:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 11:32:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-09-21 11:32:05,398 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 27 [2020-09-21 11:32:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:05,398 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-09-21 11:32:05,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:32:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-09-21 11:32:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:32:05,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:05,400 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:05,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:32:05,400 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:05,401 INFO L82 PathProgramCache]: Analyzing trace with hash 717166674, now seen corresponding path program 6 times [2020-09-21 11:32:05,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:05,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373923967] [2020-09-21 11:32:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:05,463 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:05,463 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:05,464 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:05,464 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:05,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:32:05,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:05,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-21 11:32:05,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:32:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 11:32:05,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:05,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:05,588 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:05,589 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:05,589 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:05,589 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:05,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:05,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:05,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:05,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:05,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:05,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:05,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:05,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:05,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373923967] [2020-09-21 11:32:05,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:05,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:32:05,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655708412] [2020-09-21 11:32:05,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:32:05,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:05,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:32:05,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:05,598 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 11 states. [2020-09-21 11:32:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:05,754 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-09-21 11:32:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:32:05,755 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-09-21 11:32:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:05,756 INFO L225 Difference]: With dead ends: 39 [2020-09-21 11:32:05,756 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 11:32:05,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:32:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 11:32:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-21 11:32:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 11:32:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-09-21 11:32:05,763 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2020-09-21 11:32:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:05,763 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-09-21 11:32:05,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:32:05,764 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-09-21 11:32:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:32:05,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:05,765 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:05,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:32:05,765 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1472671049, now seen corresponding path program 7 times [2020-09-21 11:32:05,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:05,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826588084] [2020-09-21 11:32:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:05,827 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:05,827 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:05,827 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:05,828 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:05,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:32:05,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:05,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 11:32:05,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:05,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:32:05,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:05,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:32:05,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:05,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:05,961 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:05,961 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:05,962 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:05,962 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:05,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:05,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:05,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:05,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:05,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:05,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:05,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:05,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:05,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826588084] [2020-09-21 11:32:05,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:05,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:32:05,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734548724] [2020-09-21 11:32:05,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:32:05,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:05,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:32:05,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:32:05,975 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 12 states. [2020-09-21 11:32:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:06,140 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-09-21 11:32:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:32:06,141 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-09-21 11:32:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:06,142 INFO L225 Difference]: With dead ends: 42 [2020-09-21 11:32:06,142 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 11:32:06,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:06,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 11:32:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-21 11:32:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 11:32:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-09-21 11:32:06,153 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 33 [2020-09-21 11:32:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:06,153 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-09-21 11:32:06,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:32:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-09-21 11:32:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 11:32:06,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:06,157 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:06,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:32:06,157 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:06,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1220091662, now seen corresponding path program 8 times [2020-09-21 11:32:06,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:06,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712595113] [2020-09-21 11:32:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,278 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,279 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,279 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,279 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 11:32:06,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-21 11:32:06,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:32:06,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:06,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-21 11:32:06,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:06,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,463 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,463 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,464 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,464 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:06,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:32:06,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:06,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:06,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:32:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:06,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712595113] [2020-09-21 11:32:06,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:06,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:32:06,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717028207] [2020-09-21 11:32:06,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:32:06,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:06,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:32:06,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:06,481 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 13 states. [2020-09-21 11:32:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:06,677 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-09-21 11:32:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:32:06,678 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-21 11:32:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:06,679 INFO L225 Difference]: With dead ends: 45 [2020-09-21 11:32:06,679 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 11:32:06,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:32:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 11:32:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-21 11:32:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 11:32:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-09-21 11:32:06,690 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 36 [2020-09-21 11:32:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:06,690 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-09-21 11:32:06,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:32:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-09-21 11:32:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 11:32:06,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:06,692 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:06,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:32:06,692 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:06,693 INFO L82 PathProgramCache]: Analyzing trace with hash 85139625, now seen corresponding path program 9 times [2020-09-21 11:32:06,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:06,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571176799] [2020-09-21 11:32:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,766 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,766 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,766 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,766 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 11:32:06,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-21 11:32:06,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:32:06,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:06,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 11:32:06,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:06,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,940 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,940 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,941 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,941 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:06,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:06,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:06,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:06,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:06,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:06,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571176799] [2020-09-21 11:32:06,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:06,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:32:06,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244556712] [2020-09-21 11:32:06,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:32:06,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:06,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:32:06,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:32:06,949 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 14 states. [2020-09-21 11:32:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:07,180 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-09-21 11:32:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:32:07,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-09-21 11:32:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:07,183 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:32:07,183 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 11:32:07,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:32:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 11:32:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-21 11:32:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 11:32:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-09-21 11:32:07,197 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 39 [2020-09-21 11:32:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:07,198 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-09-21 11:32:07,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:32:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-09-21 11:32:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 11:32:07,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:07,200 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:07,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:32:07,201 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1891479954, now seen corresponding path program 10 times [2020-09-21 11:32:07,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:07,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985364660] [2020-09-21 11:32:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:07,382 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:07,382 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:07,383 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:07,383 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:07,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 11:32:07,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:07,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-09-21 11:32:07,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:32:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 11:32:07,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:07,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:07,600 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:07,601 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:07,601 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:07,601 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:07,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:07,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:07,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:07,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:07,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:07,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:07,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:07,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:07,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985364660] [2020-09-21 11:32:07,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:07,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:32:07,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597278356] [2020-09-21 11:32:07,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:32:07,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:07,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:32:07,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:32:07,610 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 15 states. [2020-09-21 11:32:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:07,868 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-09-21 11:32:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:32:07,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-09-21 11:32:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:07,870 INFO L225 Difference]: With dead ends: 51 [2020-09-21 11:32:07,870 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:32:07,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:32:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:32:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-09-21 11:32:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 11:32:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-09-21 11:32:07,886 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 42 [2020-09-21 11:32:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:07,886 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-09-21 11:32:07,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:32:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-09-21 11:32:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 11:32:07,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:07,887 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:07,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:32:07,891 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:07,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1363997687, now seen corresponding path program 11 times [2020-09-21 11:32:07,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:07,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204465545] [2020-09-21 11:32:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,025 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,026 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,026 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,027 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 11:32:08,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-21 11:32:08,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:32:08,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:08,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-21 11:32:08,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,245 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,246 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,246 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,246 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:08,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:08,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:08,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:08,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204465545] [2020-09-21 11:32:08,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:08,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 11:32:08,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979511928] [2020-09-21 11:32:08,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 11:32:08,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:08,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 11:32:08,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:32:08,256 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 16 states. [2020-09-21 11:32:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:08,545 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-09-21 11:32:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:32:08,545 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-09-21 11:32:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:08,546 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:32:08,546 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 11:32:08,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:32:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 11:32:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-21 11:32:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 11:32:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-09-21 11:32:08,555 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 45 [2020-09-21 11:32:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:08,555 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-09-21 11:32:08,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 11:32:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-09-21 11:32:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 11:32:08,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:08,556 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:08,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:32:08,557 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:08,557 INFO L82 PathProgramCache]: Analyzing trace with hash -641889742, now seen corresponding path program 12 times [2020-09-21 11:32:08,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:08,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720716] [2020-09-21 11:32:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,660 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,660 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,660 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,660 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 11:32:08,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 11:32:08,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:32:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:08,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 11:32:08,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,871 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,871 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,871 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,871 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:08,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:08,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:08,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:08,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720716] [2020-09-21 11:32:08,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:08,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 11:32:08,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053564827] [2020-09-21 11:32:08,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 11:32:08,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:08,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 11:32:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:32:08,882 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 17 states. [2020-09-21 11:32:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:09,269 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-09-21 11:32:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 11:32:09,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-21 11:32:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:09,270 INFO L225 Difference]: With dead ends: 57 [2020-09-21 11:32:09,270 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 11:32:09,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:32:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 11:32:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-09-21 11:32:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-21 11:32:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-09-21 11:32:09,278 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 48 [2020-09-21 11:32:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:09,278 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-09-21 11:32:09,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 11:32:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-09-21 11:32:09,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 11:32:09,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:09,280 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:09,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:32:09,280 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:09,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:09,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1815285911, now seen corresponding path program 13 times [2020-09-21 11:32:09,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:09,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62056850] [2020-09-21 11:32:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,393 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,393 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,393 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,394 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-21 11:32:09,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-21 11:32:09,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:32:09,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:09,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-21 11:32:09,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,629 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,630 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,630 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,630 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:09,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:09,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:09,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:09,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62056850] [2020-09-21 11:32:09,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:09,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 11:32:09,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423760554] [2020-09-21 11:32:09,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 11:32:09,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 11:32:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:32:09,640 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 18 states. [2020-09-21 11:32:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:10,198 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2020-09-21 11:32:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 11:32:10,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-09-21 11:32:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:10,199 INFO L225 Difference]: With dead ends: 60 [2020-09-21 11:32:10,199 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 11:32:10,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:32:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 11:32:10,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-21 11:32:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 11:32:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-09-21 11:32:10,207 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51 [2020-09-21 11:32:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:10,207 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-09-21 11:32:10,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 11:32:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-09-21 11:32:10,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 11:32:10,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:10,209 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:10,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:32:10,209 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:10,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:10,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1721734446, now seen corresponding path program 14 times [2020-09-21 11:32:10,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:10,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355535576] [2020-09-21 11:32:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:10,347 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:10,348 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:10,348 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:10,348 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:10,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-21 11:32:10,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:10,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-21 11:32:10,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:10,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:32:10,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:10,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-21 11:32:10,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:10,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:10,615 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:10,615 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:10,615 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:10,616 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:10,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:10,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:10,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:10,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:10,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:10,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355535576] [2020-09-21 11:32:10,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:10,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:32:10,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648763092] [2020-09-21 11:32:10,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:32:10,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:10,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:32:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:32:10,628 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 19 states. [2020-09-21 11:32:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:10,994 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-09-21 11:32:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 11:32:10,995 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-09-21 11:32:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:10,996 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:32:10,996 INFO L226 Difference]: Without dead ends: 58 [2020-09-21 11:32:10,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:32:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-21 11:32:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-09-21 11:32:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 11:32:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-09-21 11:32:11,003 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 54 [2020-09-21 11:32:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:11,004 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-09-21 11:32:11,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:32:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-09-21 11:32:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 11:32:11,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:11,005 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:11,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 11:32:11,005 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:11,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2131151561, now seen corresponding path program 15 times [2020-09-21 11:32:11,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:11,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000490479] [2020-09-21 11:32:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:11,150 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:11,151 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:11,151 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:11,151 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:11,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 11:32:11,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:11,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-09-21 11:32:11,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:11,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:32:11,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:11,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 11:32:11,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:11,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:11,464 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:11,464 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:11,465 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:11,465 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:11,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:11,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:11,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:11,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:11,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:11,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:11,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:11,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:11,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000490479] [2020-09-21 11:32:11,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:11,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 11:32:11,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947085822] [2020-09-21 11:32:11,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 11:32:11,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:11,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 11:32:11,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:32:11,490 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 20 states. [2020-09-21 11:32:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:12,039 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-09-21 11:32:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 11:32:12,039 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-09-21 11:32:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:12,040 INFO L225 Difference]: With dead ends: 66 [2020-09-21 11:32:12,040 INFO L226 Difference]: Without dead ends: 61 [2020-09-21 11:32:12,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:32:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-21 11:32:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-09-21 11:32:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 11:32:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2020-09-21 11:32:12,054 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 57 [2020-09-21 11:32:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:12,054 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2020-09-21 11:32:12,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 11:32:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2020-09-21 11:32:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 11:32:12,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:12,057 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:12,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 11:32:12,058 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:12,058 INFO L82 PathProgramCache]: Analyzing trace with hash 457200498, now seen corresponding path program 16 times [2020-09-21 11:32:12,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:12,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034248888] [2020-09-21 11:32:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:12,217 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:12,217 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:12,217 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:12,217 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:12,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 11:32:12,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:12,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-21 11:32:12,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:12,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:32:12,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:12,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-21 11:32:12,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:12,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:12,521 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:12,522 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:12,522 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:12,522 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:12,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:12,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:12,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:12,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:12,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:12,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:12,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:12,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:12,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034248888] [2020-09-21 11:32:12,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:12,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 11:32:12,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313191237] [2020-09-21 11:32:12,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 11:32:12,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:12,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 11:32:12,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:32:12,539 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 21 states. [2020-09-21 11:32:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:13,082 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2020-09-21 11:32:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 11:32:13,083 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2020-09-21 11:32:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:13,084 INFO L225 Difference]: With dead ends: 69 [2020-09-21 11:32:13,084 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 11:32:13,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:32:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 11:32:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-09-21 11:32:13,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 11:32:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2020-09-21 11:32:13,100 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 60 [2020-09-21 11:32:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:13,100 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2020-09-21 11:32:13,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 11:32:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2020-09-21 11:32:13,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 11:32:13,101 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:13,101 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:13,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 11:32:13,102 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:13,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:13,102 INFO L82 PathProgramCache]: Analyzing trace with hash 646356521, now seen corresponding path program 17 times [2020-09-21 11:32:13,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:13,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453913116] [2020-09-21 11:32:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:13,322 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:13,322 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:13,322 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:13,323 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:13,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 11:32:13,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:13,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-21 11:32:13,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:13,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:32:13,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:13,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-21 11:32:13,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:13,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:13,669 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:13,669 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:13,670 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:13,670 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:13,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:13,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:13,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:13,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:13,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:13,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:13,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:13,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:13,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453913116] [2020-09-21 11:32:13,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:13,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 11:32:13,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792545326] [2020-09-21 11:32:13,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 11:32:13,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:13,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 11:32:13,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:32:13,681 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand 22 states. [2020-09-21 11:32:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:14,277 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-09-21 11:32:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 11:32:14,277 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-09-21 11:32:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:14,278 INFO L225 Difference]: With dead ends: 72 [2020-09-21 11:32:14,278 INFO L226 Difference]: Without dead ends: 67 [2020-09-21 11:32:14,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:32:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-21 11:32:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-09-21 11:32:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-21 11:32:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2020-09-21 11:32:14,284 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 63 [2020-09-21 11:32:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:14,284 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2020-09-21 11:32:14,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 11:32:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2020-09-21 11:32:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-21 11:32:14,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:14,285 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:14,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 11:32:14,286 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:14,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:14,286 INFO L82 PathProgramCache]: Analyzing trace with hash 796345362, now seen corresponding path program 18 times [2020-09-21 11:32:14,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:14,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476761230] [2020-09-21 11:32:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:14,465 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:14,466 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:14,466 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:14,466 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:14,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-21 11:32:14,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:14,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-21 11:32:14,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:14,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-21 11:32:14,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:14,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-09-21 11:32:14,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:14,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:14,966 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:14,966 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:14,966 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:14,967 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:14,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:14,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:14,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:14,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:14,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:14,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:14,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:14,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:14,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476761230] [2020-09-21 11:32:14,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:14,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 11:32:14,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891607] [2020-09-21 11:32:14,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 11:32:14,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 11:32:14,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:32:14,985 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 23 states. [2020-09-21 11:32:15,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:15,521 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-09-21 11:32:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:32:15,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-09-21 11:32:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:15,522 INFO L225 Difference]: With dead ends: 75 [2020-09-21 11:32:15,522 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 11:32:15,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:32:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 11:32:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-09-21 11:32:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-21 11:32:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-09-21 11:32:15,532 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 66 [2020-09-21 11:32:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:15,532 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-09-21 11:32:15,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 11:32:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-09-21 11:32:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 11:32:15,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:15,533 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:15,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 11:32:15,534 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:15,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:15,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1947047543, now seen corresponding path program 19 times [2020-09-21 11:32:15,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:15,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281970261] [2020-09-21 11:32:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:15,733 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:15,734 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:15,734 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:15,734 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:15,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-21 11:32:15,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:15,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-09-21 11:32:15,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:15,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 11:32:15,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:15,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-21 11:32:15,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:16,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:16,192 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:16,192 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:16,192 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:16,193 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:16,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:16,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:16,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:16,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:16,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:16,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:16,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:16,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:16,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281970261] [2020-09-21 11:32:16,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:16,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 11:32:16,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698714378] [2020-09-21 11:32:16,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 11:32:16,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:16,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 11:32:16,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:32:16,206 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 24 states. [2020-09-21 11:32:16,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:16,952 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-09-21 11:32:16,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 11:32:16,952 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-09-21 11:32:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:16,953 INFO L225 Difference]: With dead ends: 78 [2020-09-21 11:32:16,953 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 11:32:16,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:32:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 11:32:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-09-21 11:32:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 11:32:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-09-21 11:32:16,966 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 69 [2020-09-21 11:32:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:16,967 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-09-21 11:32:16,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 11:32:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-09-21 11:32:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-21 11:32:16,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:16,968 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:16,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 11:32:16,968 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:16,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1432404814, now seen corresponding path program 20 times [2020-09-21 11:32:16,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:16,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980292978] [2020-09-21 11:32:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:17,183 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:17,183 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:17,183 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:17,184 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:17,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-21 11:32:17,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:17,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-09-21 11:32:17,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:17,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-21 11:32:17,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:17,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-21 11:32:17,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:17,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:17,697 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:17,697 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:17,697 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:17,697 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:17,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:17,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:17,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:17,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:17,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:17,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:17,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:17,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:17,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980292978] [2020-09-21 11:32:17,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:17,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 11:32:17,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194295305] [2020-09-21 11:32:17,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 11:32:17,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:17,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 11:32:17,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:32:17,716 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 25 states. [2020-09-21 11:32:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:18,515 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-09-21 11:32:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 11:32:18,516 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-09-21 11:32:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:18,517 INFO L225 Difference]: With dead ends: 81 [2020-09-21 11:32:18,517 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 11:32:18,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:32:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 11:32:18,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-21 11:32:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 11:32:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-09-21 11:32:18,524 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 72 [2020-09-21 11:32:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:18,525 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-09-21 11:32:18,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 11:32:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-09-21 11:32:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-21 11:32:18,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:18,526 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:18,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 11:32:18,526 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:18,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:18,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1550855401, now seen corresponding path program 21 times [2020-09-21 11:32:18,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:18,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489432977] [2020-09-21 11:32:18,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:18,759 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:18,759 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:18,760 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:18,760 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:18,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-21 11:32:18,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:18,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-09-21 11:32:18,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:18,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-21 11:32:18,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:18,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-21 11:32:18,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:19,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:19,262 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:19,262 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:19,263 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:19,263 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:19,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:19,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:19,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:32:19,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:19,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:19,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:19,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:19,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:19,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489432977] [2020-09-21 11:32:19,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:19,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 11:32:19,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415115398] [2020-09-21 11:32:19,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 11:32:19,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:19,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 11:32:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:32:19,289 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 26 states. [2020-09-21 11:32:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:20,107 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-09-21 11:32:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 11:32:20,112 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-09-21 11:32:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:20,113 INFO L225 Difference]: With dead ends: 84 [2020-09-21 11:32:20,113 INFO L226 Difference]: Without dead ends: 79 [2020-09-21 11:32:20,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:32:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-21 11:32:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-09-21 11:32:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 11:32:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2020-09-21 11:32:20,121 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 75 [2020-09-21 11:32:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:20,121 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2020-09-21 11:32:20,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 11:32:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2020-09-21 11:32:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-21 11:32:20,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:20,122 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:20,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 11:32:20,122 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:20,123 INFO L82 PathProgramCache]: Analyzing trace with hash 97664338, now seen corresponding path program 22 times [2020-09-21 11:32:20,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:20,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335251942] [2020-09-21 11:32:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:20,357 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:20,358 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:20,358 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:20,358 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:20,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-21 11:32:20,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:20,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-09-21 11:32:20,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 11:32:20,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:20,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-21 11:32:20,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:20,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:20,924 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:20,924 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:20,924 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:20,924 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:20,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:20,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:20,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:20,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335251942] [2020-09-21 11:32:20,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:20,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 11:32:20,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084658684] [2020-09-21 11:32:20,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 11:32:20,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:20,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 11:32:20,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:32:20,938 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 27 states. [2020-09-21 11:32:21,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:21,878 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2020-09-21 11:32:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 11:32:21,878 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2020-09-21 11:32:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:21,879 INFO L225 Difference]: With dead ends: 87 [2020-09-21 11:32:21,879 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 11:32:21,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:32:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 11:32:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-09-21 11:32:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-21 11:32:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-09-21 11:32:21,891 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 78 [2020-09-21 11:32:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:21,892 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-09-21 11:32:21,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 11:32:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-09-21 11:32:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-21 11:32:21,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:21,893 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:21,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 11:32:21,893 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:21,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:21,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1353050185, now seen corresponding path program 23 times [2020-09-21 11:32:21,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:21,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111852599] [2020-09-21 11:32:21,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:22,188 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:22,188 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:22,189 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:22,189 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:22,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-21 11:32:22,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:22,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-09-21 11:32:22,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:22,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-21 11:32:22,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:22,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-21 11:32:22,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:22,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:22,741 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:22,742 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:22,742 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:22,742 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:22,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:22,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:22,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:22,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:22,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:22,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:22,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:22,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:22,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111852599] [2020-09-21 11:32:22,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:22,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 11:32:22,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408710808] [2020-09-21 11:32:22,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 11:32:22,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:22,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 11:32:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:32:22,758 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 28 states. [2020-09-21 11:32:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:23,795 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-09-21 11:32:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 11:32:23,796 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-09-21 11:32:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:23,797 INFO L225 Difference]: With dead ends: 90 [2020-09-21 11:32:23,797 INFO L226 Difference]: Without dead ends: 85 [2020-09-21 11:32:23,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:32:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-21 11:32:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-09-21 11:32:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-21 11:32:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2020-09-21 11:32:23,806 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 81 [2020-09-21 11:32:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:23,806 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2020-09-21 11:32:23,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 11:32:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2020-09-21 11:32:23,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-21 11:32:23,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:23,813 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:23,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 11:32:23,813 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:23,813 INFO L82 PathProgramCache]: Analyzing trace with hash -22395406, now seen corresponding path program 24 times [2020-09-21 11:32:23,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:23,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455654248] [2020-09-21 11:32:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:24,110 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:24,110 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:24,110 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:24,111 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:24,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-21 11:32:24,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:24,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-09-21 11:32:24,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:24,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-21 11:32:24,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:24,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-09-21 11:32:24,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:24,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:24,723 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:24,724 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:24,724 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:24,724 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:24,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:24,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:24,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:24,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:24,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:24,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:24,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:24,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:24,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455654248] [2020-09-21 11:32:24,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:24,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 11:32:24,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816340030] [2020-09-21 11:32:24,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 11:32:24,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:24,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 11:32:24,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:32:24,745 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand 29 states. [2020-09-21 11:32:25,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:25,837 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-09-21 11:32:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-21 11:32:25,837 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 84 [2020-09-21 11:32:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:25,839 INFO L225 Difference]: With dead ends: 93 [2020-09-21 11:32:25,839 INFO L226 Difference]: Without dead ends: 88 [2020-09-21 11:32:25,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:32:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-21 11:32:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-09-21 11:32:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-21 11:32:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2020-09-21 11:32:25,847 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 84 [2020-09-21 11:32:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:25,847 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2020-09-21 11:32:25,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 11:32:25,847 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2020-09-21 11:32:25,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-21 11:32:25,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:25,848 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:25,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 11:32:25,848 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:25,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1933993047, now seen corresponding path program 25 times [2020-09-21 11:32:25,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:25,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209587144] [2020-09-21 11:32:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:26,134 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:26,134 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:26,135 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:26,135 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:26,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-21 11:32:26,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:26,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-09-21 11:32:26,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-21 11:32:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-21 11:32:26,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:26,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:26,882 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:26,882 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:26,882 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:26,882 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:26,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:26,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:26,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:26,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:26,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:26,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:26,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:26,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:26,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209587144] [2020-09-21 11:32:26,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:26,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 11:32:26,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772470234] [2020-09-21 11:32:26,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 11:32:26,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:26,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 11:32:26,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:32:26,899 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand 30 states. [2020-09-21 11:32:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:28,138 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-09-21 11:32:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 11:32:28,139 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-09-21 11:32:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:28,140 INFO L225 Difference]: With dead ends: 96 [2020-09-21 11:32:28,141 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 11:32:28,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:32:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 11:32:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-09-21 11:32:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-21 11:32:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2020-09-21 11:32:28,148 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 87 [2020-09-21 11:32:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:28,149 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2020-09-21 11:32:28,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 11:32:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2020-09-21 11:32:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-21 11:32:28,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:28,150 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:28,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 11:32:28,151 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash 927028882, now seen corresponding path program 26 times [2020-09-21 11:32:28,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:28,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042561247] [2020-09-21 11:32:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:28,451 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:28,451 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:28,451 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:28,452 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:28,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-21 11:32:28,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:28,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-09-21 11:32:28,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:28,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-21 11:32:28,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:28,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-09-21 11:32:28,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:29,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:29,231 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:29,231 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:29,231 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:29,232 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:29,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:29,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:29,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:29,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:29,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:29,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:29,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:29,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:29,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042561247] [2020-09-21 11:32:29,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:29,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-21 11:32:29,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992220781] [2020-09-21 11:32:29,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-21 11:32:29,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:29,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-21 11:32:29,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:32:29,247 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand 31 states. [2020-09-21 11:32:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:30,503 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2020-09-21 11:32:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-21 11:32:30,504 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 90 [2020-09-21 11:32:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:30,505 INFO L225 Difference]: With dead ends: 99 [2020-09-21 11:32:30,506 INFO L226 Difference]: Without dead ends: 94 [2020-09-21 11:32:30,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:32:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-21 11:32:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-09-21 11:32:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-21 11:32:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2020-09-21 11:32:30,512 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 90 [2020-09-21 11:32:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:30,512 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2020-09-21 11:32:30,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-21 11:32:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2020-09-21 11:32:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 11:32:30,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:30,514 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:30,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 11:32:30,514 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash 5326601, now seen corresponding path program 27 times [2020-09-21 11:32:30,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:30,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520051664] [2020-09-21 11:32:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:30,852 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:30,852 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:30,852 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:30,853 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:30,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-21 11:32:30,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:30,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-09-21 11:32:30,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:30,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-21 11:32:30,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:30,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-21 11:32:30,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:31,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:31,761 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:31,761 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:31,762 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:31,762 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:31,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:31,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:31,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:31,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:31,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:31,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:31,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520051664] [2020-09-21 11:32:31,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:31,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 11:32:31,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177604803] [2020-09-21 11:32:31,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 11:32:31,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:31,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 11:32:31,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:32:31,802 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 32 states. [2020-09-21 11:32:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:33,122 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2020-09-21 11:32:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 11:32:33,123 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-09-21 11:32:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:33,125 INFO L225 Difference]: With dead ends: 102 [2020-09-21 11:32:33,125 INFO L226 Difference]: Without dead ends: 97 [2020-09-21 11:32:33,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:32:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-21 11:32:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-09-21 11:32:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-21 11:32:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2020-09-21 11:32:33,134 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 93 [2020-09-21 11:32:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:33,134 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2020-09-21 11:32:33,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 11:32:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2020-09-21 11:32:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-21 11:32:33,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:33,135 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:33,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 11:32:33,136 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:33,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:33,136 INFO L82 PathProgramCache]: Analyzing trace with hash -701403342, now seen corresponding path program 28 times [2020-09-21 11:32:33,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:33,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831239865] [2020-09-21 11:32:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:33,479 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:33,479 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:33,479 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:33,479 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:33,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-21 11:32:33,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:33,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-09-21 11:32:33,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:33,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-21 11:32:33,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:33,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-21 11:32:33,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:34,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:34,315 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:34,315 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:34,315 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:34,315 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:34,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:34,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:34,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:34,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:34,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:34,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:34,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831239865] [2020-09-21 11:32:34,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:34,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-21 11:32:34,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246479032] [2020-09-21 11:32:34,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-21 11:32:34,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:34,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-21 11:32:34,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:32:34,341 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 33 states. [2020-09-21 11:32:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:35,758 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2020-09-21 11:32:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-21 11:32:35,758 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 96 [2020-09-21 11:32:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:35,760 INFO L225 Difference]: With dead ends: 105 [2020-09-21 11:32:35,760 INFO L226 Difference]: Without dead ends: 100 [2020-09-21 11:32:35,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:32:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-21 11:32:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-09-21 11:32:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-21 11:32:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2020-09-21 11:32:35,773 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 96 [2020-09-21 11:32:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:35,773 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2020-09-21 11:32:35,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-21 11:32:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2020-09-21 11:32:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-21 11:32:35,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:35,774 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:35,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 11:32:35,775 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash -963450263, now seen corresponding path program 29 times [2020-09-21 11:32:35,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:35,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786641169] [2020-09-21 11:32:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:36,127 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:36,127 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:36,127 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:36,128 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:36,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-21 11:32:36,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:36,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-09-21 11:32:36,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-09-21 11:32:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-09-21 11:32:36,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:37,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:37,069 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:37,069 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:37,069 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:37,070 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:37,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:37,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:37,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:37,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:37,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:37,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:37,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786641169] [2020-09-21 11:32:37,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:37,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-21 11:32:37,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600574759] [2020-09-21 11:32:37,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-21 11:32:37,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:37,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-21 11:32:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:32:37,088 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand 34 states. [2020-09-21 11:32:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:38,662 INFO L93 Difference]: Finished difference Result 108 states and 139 transitions. [2020-09-21 11:32:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-21 11:32:38,663 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 99 [2020-09-21 11:32:38,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:38,664 INFO L225 Difference]: With dead ends: 108 [2020-09-21 11:32:38,665 INFO L226 Difference]: Without dead ends: 103 [2020-09-21 11:32:38,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:32:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-21 11:32:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-09-21 11:32:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-21 11:32:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2020-09-21 11:32:38,673 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 99 [2020-09-21 11:32:38,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:38,674 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2020-09-21 11:32:38,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-21 11:32:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2020-09-21 11:32:38,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-21 11:32:38,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:38,675 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:38,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 11:32:38,675 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:38,676 INFO L82 PathProgramCache]: Analyzing trace with hash 647270354, now seen corresponding path program 30 times [2020-09-21 11:32:38,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:38,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85355507] [2020-09-21 11:32:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:39,086 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:39,087 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:39,087 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:39,087 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:39,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-09-21 11:32:39,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:39,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-09-21 11:32:39,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:39,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-21 11:32:39,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:39,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-09-21 11:32:39,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:40,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:40,010 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:40,010 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:40,010 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:40,010 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:40,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:40,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:40,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:32:40,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:40,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:40,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:40,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:40,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:40,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85355507] [2020-09-21 11:32:40,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:40,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-21 11:32:40,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158858973] [2020-09-21 11:32:40,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-21 11:32:40,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-21 11:32:40,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:32:40,030 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand 35 states. [2020-09-21 11:32:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:41,710 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2020-09-21 11:32:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-21 11:32:41,711 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 102 [2020-09-21 11:32:41,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:41,712 INFO L225 Difference]: With dead ends: 111 [2020-09-21 11:32:41,712 INFO L226 Difference]: Without dead ends: 106 [2020-09-21 11:32:41,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:32:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-21 11:32:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-09-21 11:32:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-21 11:32:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2020-09-21 11:32:41,721 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 102 [2020-09-21 11:32:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:41,722 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2020-09-21 11:32:41,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-21 11:32:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2020-09-21 11:32:41,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-21 11:32:41,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:41,723 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:41,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-21 11:32:41,723 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:41,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2044426807, now seen corresponding path program 31 times [2020-09-21 11:32:41,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:41,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998056597] [2020-09-21 11:32:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:42,135 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:42,135 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:42,136 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:42,136 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:42,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-21 11:32:42,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:42,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-09-21 11:32:42,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-09-21 11:32:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-21 11:32:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:43,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:43,163 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:43,163 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:43,164 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:43,164 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:43,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:43,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:43,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:43,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:43,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:43,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:43,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998056597] [2020-09-21 11:32:43,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:43,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-21 11:32:43,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127380478] [2020-09-21 11:32:43,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-21 11:32:43,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:43,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-21 11:32:43,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:32:43,191 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand 36 states. [2020-09-21 11:32:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:44,996 INFO L93 Difference]: Finished difference Result 114 states and 147 transitions. [2020-09-21 11:32:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-21 11:32:44,997 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 105 [2020-09-21 11:32:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:44,998 INFO L225 Difference]: With dead ends: 114 [2020-09-21 11:32:44,998 INFO L226 Difference]: Without dead ends: 109 [2020-09-21 11:32:44,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 11:32:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-21 11:32:45,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-09-21 11:32:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-21 11:32:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 142 transitions. [2020-09-21 11:32:45,008 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 142 transitions. Word has length 105 [2020-09-21 11:32:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:45,009 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 142 transitions. [2020-09-21 11:32:45,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-21 11:32:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 142 transitions. [2020-09-21 11:32:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-21 11:32:45,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:45,010 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:45,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-21 11:32:45,010 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:45,011 INFO L82 PathProgramCache]: Analyzing trace with hash 939833458, now seen corresponding path program 32 times [2020-09-21 11:32:45,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:45,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107722894] [2020-09-21 11:32:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:45,431 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:45,431 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:45,431 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:45,431 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:45,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-21 11:32:45,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:45,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-09-21 11:32:45,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:45,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-21 11:32:45,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:45,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-09-21 11:32:45,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:46,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:46,426 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:46,427 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:46,427 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:46,427 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:46,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:46,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:46,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:46,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:46,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:46,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:46,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107722894] [2020-09-21 11:32:46,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:46,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-21 11:32:46,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630139460] [2020-09-21 11:32:46,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-21 11:32:46,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-21 11:32:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 11:32:46,448 INFO L87 Difference]: Start difference. First operand 109 states and 142 transitions. Second operand 37 states. [2020-09-21 11:32:48,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:48,371 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2020-09-21 11:32:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-21 11:32:48,372 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 108 [2020-09-21 11:32:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:48,374 INFO L225 Difference]: With dead ends: 117 [2020-09-21 11:32:48,374 INFO L226 Difference]: Without dead ends: 112 [2020-09-21 11:32:48,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 11:32:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-21 11:32:48,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-09-21 11:32:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-21 11:32:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 146 transitions. [2020-09-21 11:32:48,384 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 146 transitions. Word has length 108 [2020-09-21 11:32:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:48,384 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 146 transitions. [2020-09-21 11:32:48,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-21 11:32:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 146 transitions. [2020-09-21 11:32:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-21 11:32:48,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:48,386 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:48,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-21 11:32:48,386 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:48,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:48,386 INFO L82 PathProgramCache]: Analyzing trace with hash -785639127, now seen corresponding path program 33 times [2020-09-21 11:32:48,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:48,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95405360] [2020-09-21 11:32:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,762 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,762 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,762 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,763 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-09-21 11:32:48,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-09-21 11:32:48,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-09-21 11:32:48,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:48,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-09-21 11:32:48,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,861 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,862 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,862 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,862 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:49,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:49,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:49,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95405360] [2020-09-21 11:32:49,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:49,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-21 11:32:49,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157247572] [2020-09-21 11:32:49,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-21 11:32:49,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-21 11:32:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 11:32:49,884 INFO L87 Difference]: Start difference. First operand 112 states and 146 transitions. Second operand 38 states. [2020-09-21 11:32:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:51,921 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2020-09-21 11:32:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-21 11:32:51,922 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 111 [2020-09-21 11:32:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:51,923 INFO L225 Difference]: With dead ends: 120 [2020-09-21 11:32:51,923 INFO L226 Difference]: Without dead ends: 115 [2020-09-21 11:32:51,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2020-09-21 11:32:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-21 11:32:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-09-21 11:32:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-21 11:32:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 150 transitions. [2020-09-21 11:32:51,934 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 150 transitions. Word has length 111 [2020-09-21 11:32:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:51,935 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 150 transitions. [2020-09-21 11:32:51,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-21 11:32:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 150 transitions. [2020-09-21 11:32:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-21 11:32:51,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:51,937 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:51,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-21 11:32:51,937 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2124146962, now seen corresponding path program 34 times [2020-09-21 11:32:51,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:51,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480642731] [2020-09-21 11:32:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:52,394 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:52,394 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:52,395 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:52,395 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:52,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-21 11:32:52,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:52,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-09-21 11:32:52,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:52,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-21 11:32:52,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:52,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-09-21 11:32:52,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:53,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:53,567 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:53,568 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:53,568 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:53,568 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:53,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:53,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:53,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:53,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:53,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:53,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480642731] [2020-09-21 11:32:53,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:53,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-21 11:32:53,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157243048] [2020-09-21 11:32:53,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-21 11:32:53,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:53,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-21 11:32:53,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-09-21 11:32:53,612 INFO L87 Difference]: Start difference. First operand 115 states and 150 transitions. Second operand 39 states. [2020-09-21 11:32:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:55,779 INFO L93 Difference]: Finished difference Result 123 states and 159 transitions. [2020-09-21 11:32:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-21 11:32:55,779 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 114 [2020-09-21 11:32:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:55,781 INFO L225 Difference]: With dead ends: 123 [2020-09-21 11:32:55,781 INFO L226 Difference]: Without dead ends: 118 [2020-09-21 11:32:55,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2020-09-21 11:32:55,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-21 11:32:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-09-21 11:32:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-21 11:32:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2020-09-21 11:32:55,793 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 114 [2020-09-21 11:32:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:55,794 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2020-09-21 11:32:55,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-21 11:32:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2020-09-21 11:32:55,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-21 11:32:55,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:55,798 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:55,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-21 11:32:55,798 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2058378103, now seen corresponding path program 35 times [2020-09-21 11:32:55,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:55,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725551386] [2020-09-21 11:32:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat