/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options 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-c90d42b [2020-09-24 16:11:27,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:11:27,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:11:27,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:11:27,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:11:27,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:11:27,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:11:27,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:11:27,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:11:27,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:11:27,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:11:27,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:11:27,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:11:27,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:11:27,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:11:27,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:11:27,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:11:27,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:11:27,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:11:27,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:11:27,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:11:27,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:11:27,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:11:27,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:11:27,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:11:27,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:11:27,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:11:27,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:11:27,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:11:27,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:11:27,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:11:27,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:11:27,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:11:27,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:11:27,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:11:27,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:11:27,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:11:27,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:11:27,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:11:27,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:11:27,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:11:27,665 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 [2020-09-24 16:11:27,689 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:11:27,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:11:27,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:11:27,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:11:27,692 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:11:27,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:11:27,692 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:11:27,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:11:27,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:11:27,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:11:27,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:11:27,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:11:27,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:11:27,693 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:11:27,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:11:27,694 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:11:27,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:11:27,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:11:27,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:11:27,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:11:27,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:11:27,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:11:27,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:11:27,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:11:27,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:11:27,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:11:27,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:11:27,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:11:27,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:11:27,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;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; [2020-09-24 16:11:28,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:11:28,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:11:28,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:11:28,188 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:11:28,190 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:11:28,192 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-24 16:11:28,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e20823e7/6ccc29f492034f10b1e2c3bb59f0b336/FLAG59f859fa4 [2020-09-24 16:11:28,839 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:11:28,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-24 16:11:28,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e20823e7/6ccc29f492034f10b1e2c3bb59f0b336/FLAG59f859fa4 [2020-09-24 16:11:29,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e20823e7/6ccc29f492034f10b1e2c3bb59f0b336 [2020-09-24 16:11:29,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:11:29,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:11:29,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:11:29,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:11:29,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:11:29,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:11:29" (1/1) ... [2020-09-24 16:11:29,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@756d08d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29, skipping insertion in model container [2020-09-24 16:11:29,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:11:29" (1/1) ... [2020-09-24 16:11:29,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:11:29,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:11:29,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:11:29,466 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:11:29,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:11:29,505 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:11:29,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29 WrapperNode [2020-09-24 16:11:29,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:11:29,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:11:29,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:11:29,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:11:29,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29" (1/1) ... [2020-09-24 16:11:29,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29" (1/1) ... [2020-09-24 16:11:29,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29" (1/1) ... [2020-09-24 16:11:29,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29" (1/1) ... [2020-09-24 16:11:29,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29" (1/1) ... [2020-09-24 16:11:29,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29" (1/1) ... [2020-09-24 16:11:29,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29" (1/1) ... [2020-09-24 16:11:29,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:11:29,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:11:29,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:11:29,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:11:29,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29" (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 [2020-09-24 16:11:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:11:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:11:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 16:11:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:11:29,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:11:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:11:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 16:11:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 16:11:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:11:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 16:11:29,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:11:29,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:11:29,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:11:29,942 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:11:29,942 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 16:11:29,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:11:29 BoogieIcfgContainer [2020-09-24 16:11:29,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:11:29,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:11:29,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:11:29,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:11:29,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:11:29" (1/3) ... [2020-09-24 16:11:29,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164263f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:11:29, skipping insertion in model container [2020-09-24 16:11:29,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:29" (2/3) ... [2020-09-24 16:11:29,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164263f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:11:29, skipping insertion in model container [2020-09-24 16:11:29,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:11:29" (3/3) ... [2020-09-24 16:11:29,986 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-24 16:11:30,016 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:11:30,041 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:11:30,066 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:11:30,097 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:11:30,098 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:11:30,098 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:11:30,098 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:11:30,098 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:11:30,099 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:11:30,099 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:11:30,099 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:11:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-24 16:11:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 16:11:30,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:30,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:30,129 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:30,136 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-24 16:11:30,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:30,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338005382] [2020-09-24 16:11:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:30,252 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:30,253 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:30,253 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:30,253 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:30,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 16:11:30,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:30,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 16:11:30,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:30,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:30,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 16:11:30,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:30,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:30,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:30,288 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:30,288 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:30,289 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:30,289 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:30,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:30,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:30,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:11:30,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:30,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:30,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:30,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:30,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:30,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338005382] [2020-09-24 16:11:30,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:11:30,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 16:11:30,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511629493] [2020-09-24 16:11:30,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 16:11:30,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:30,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 16:11:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 16:11:30,328 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-24 16:11:30,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:30,353 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-24 16:11:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 16:11:30,354 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-24 16:11:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:30,363 INFO L225 Difference]: With dead ends: 41 [2020-09-24 16:11:30,364 INFO L226 Difference]: Without dead ends: 22 [2020-09-24 16:11:30,367 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 [2020-09-24 16:11:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-24 16:11:30,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-24 16:11:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 16:11:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-24 16:11:30,407 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-09-24 16:11:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:30,408 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-24 16:11:30,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 16:11:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-24 16:11:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-24 16:11:30,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:30,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:30,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:11:30,410 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:30,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-09-24 16:11:30,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:30,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52386201] [2020-09-24 16:11:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:30,440 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:30,440 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:30,441 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:30,441 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:30,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 16:11:30,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:30,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 16:11:30,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:30,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:11:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 16:11:30,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:30,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:30,503 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:30,503 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:30,503 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:30,504 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:30,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:30,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:30,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:11:30,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:30,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:30,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:30,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:30,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52386201] [2020-09-24 16:11:30,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:11:30,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:11:30,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531391529] [2020-09-24 16:11:30,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:11:30,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:30,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:11:30,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:11:30,515 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-09-24 16:11:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:30,593 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-24 16:11:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:11:30,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-24 16:11:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:30,597 INFO L225 Difference]: With dead ends: 50 [2020-09-24 16:11:30,597 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 16:11:30,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:11:30,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 16:11:30,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-09-24 16:11:30,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-24 16:11:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-24 16:11:30,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-24 16:11:30,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:30,607 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-24 16:11:30,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:11:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-24 16:11:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 16:11:30,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:30,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:30,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:11:30,609 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:30,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:30,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-09-24 16:11:30,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:30,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835647665] [2020-09-24 16:11:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:30,661 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:30,661 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:30,661 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:30,662 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:30,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 16:11:30,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:30,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 16:11:30,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:30,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 16:11:30,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:30,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 16:11:30,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:30,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:30,751 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:30,752 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:30,752 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:30,752 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:30,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:30,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:30,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:30,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:30,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:30,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:30,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:30,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:30,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835647665] [2020-09-24 16:11:30,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:11:30,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 16:11:30,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037774950] [2020-09-24 16:11:30,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 16:11:30,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:30,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 16:11:30,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:11:30,763 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-09-24 16:11:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:30,834 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-09-24 16:11:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 16:11:30,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-24 16:11:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:30,836 INFO L225 Difference]: With dead ends: 38 [2020-09-24 16:11:30,836 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 16:11:30,837 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 [2020-09-24 16:11:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 16:11:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-24 16:11:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 16:11:30,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-24 16:11:30,843 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-09-24 16:11:30,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:30,844 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-24 16:11:30,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 16:11:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-24 16:11:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 16:11:30,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:30,845 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:30,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:11:30,846 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:30,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:30,846 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-09-24 16:11:30,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:30,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317002972] [2020-09-24 16:11:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:30,870 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:30,870 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:30,871 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:30,871 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:30,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 16:11:30,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:30,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 16:11:30,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:11:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 16:11:30,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:30,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:30,915 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:30,915 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:30,916 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:30,916 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:30,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:30,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:30,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:30,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:30,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:30,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:30,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:30,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:30,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317002972] [2020-09-24 16:11:30,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:30,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 16:11:30,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812701575] [2020-09-24 16:11:30,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:11:30,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:30,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:11:30,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:11:30,925 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-24 16:11:30,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:30,992 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-09-24 16:11:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 16:11:30,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-24 16:11:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:30,994 INFO L225 Difference]: With dead ends: 59 [2020-09-24 16:11:30,994 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 16:11:30,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:11:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 16:11:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-09-24 16:11:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 16:11:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-24 16:11:31,002 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-09-24 16:11:31,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:31,003 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-24 16:11:31,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:11:31,003 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-24 16:11:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 16:11:31,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:31,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:31,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:11:31,005 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:31,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-09-24 16:11:31,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:31,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057006087] [2020-09-24 16:11:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:31,055 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:31,055 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:31,055 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:31,056 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:31,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 16:11:31,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:31,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 16:11:31,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:11:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 16:11:31,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:31,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:31,217 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:31,217 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:31,218 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:31,218 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:31,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:31,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:31,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:31,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:31,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:31,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:31,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:31,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:31,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057006087] [2020-09-24 16:11:31,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:31,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 16:11:31,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632411745] [2020-09-24 16:11:31,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:11:31,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:31,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:11:31,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:11:31,226 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-24 16:11:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:31,292 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-24 16:11:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 16:11:31,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-24 16:11:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:31,294 INFO L225 Difference]: With dead ends: 46 [2020-09-24 16:11:31,294 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 16:11:31,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:11:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 16:11:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-24 16:11:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 16:11:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-24 16:11:31,301 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-09-24 16:11:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:31,302 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-24 16:11:31,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:11:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-24 16:11:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 16:11:31,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:31,303 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:31,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:11:31,304 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-09-24 16:11:31,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:31,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533806024] [2020-09-24 16:11:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:31,328 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:31,329 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:31,329 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:31,329 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:31,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 16:11:31,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:31,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 16:11:31,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:31,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 16:11:31,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 16:11:31,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:31,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:31,391 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:31,391 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:31,391 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:31,391 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:31,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:31,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:31,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:31,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:31,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:31,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:31,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:31,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 16:11:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:31,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533806024] [2020-09-24 16:11:31,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:31,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 16:11:31,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599324359] [2020-09-24 16:11:31,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 16:11:31,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:31,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 16:11:31,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:11:31,411 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-09-24 16:11:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:31,486 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-09-24 16:11:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 16:11:31,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-24 16:11:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:31,488 INFO L225 Difference]: With dead ends: 68 [2020-09-24 16:11:31,488 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 16:11:31,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:11:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 16:11:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-09-24 16:11:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 16:11:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-24 16:11:31,496 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2020-09-24 16:11:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:31,497 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-24 16:11:31,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 16:11:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-24 16:11:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 16:11:31,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:31,498 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:31,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:11:31,499 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:31,499 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 2 times [2020-09-24 16:11:31,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:31,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479732140] [2020-09-24 16:11:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:31,566 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:31,567 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:31,567 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:31,567 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:31,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 16:11:31,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:31,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 16:11:31,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:11:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 16:11:31,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:31,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:31,689 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:31,690 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:31,690 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:31,690 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:31,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:31,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:31,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:31,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:31,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:31,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479732140] [2020-09-24 16:11:31,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:31,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 16:11:31,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122975216] [2020-09-24 16:11:31,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:11:31,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:31,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:11:31,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:11:31,701 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-09-24 16:11:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:31,808 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-24 16:11:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 16:11:31,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-09-24 16:11:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:31,810 INFO L225 Difference]: With dead ends: 55 [2020-09-24 16:11:31,810 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 16:11:31,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:11:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 16:11:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-24 16:11:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 16:11:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-24 16:11:31,821 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 35 [2020-09-24 16:11:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:31,822 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-24 16:11:31,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:11:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-24 16:11:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 16:11:31,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:31,827 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:31,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:11:31,828 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:31,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 3 times [2020-09-24 16:11:31,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:31,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872236520] [2020-09-24 16:11:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:31,875 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:31,875 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:31,875 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:31,876 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:31,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 16:11:31,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:31,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 16:11:31,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:31,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:11:31,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:31,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 16:11:31,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:31,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:31,943 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:31,943 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:31,944 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:31,944 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:31,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:31,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:31,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:31,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:31,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:31,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872236520] [2020-09-24 16:11:31,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:31,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 16:11:31,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806399566] [2020-09-24 16:11:31,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:11:31,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:31,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:11:31,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:11:31,956 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-09-24 16:11:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:32,066 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-09-24 16:11:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 16:11:32,067 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-24 16:11:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:32,068 INFO L225 Difference]: With dead ends: 77 [2020-09-24 16:11:32,069 INFO L226 Difference]: Without dead ends: 61 [2020-09-24 16:11:32,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:11:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-24 16:11:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-09-24 16:11:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 16:11:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-24 16:11:32,075 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 42 [2020-09-24 16:11:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:32,076 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-24 16:11:32,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:11:32,076 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-24 16:11:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 16:11:32,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:32,077 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:32,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:11:32,078 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:32,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:32,078 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 3 times [2020-09-24 16:11:32,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:32,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19885747] [2020-09-24 16:11:32,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,120 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,121 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,121 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,121 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 16:11:32,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 16:11:32,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:11:32,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:32,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-24 16:11:32,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:32,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,260 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,260 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,260 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,261 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:32,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:32,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:32,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:32,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:32,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:32,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19885747] [2020-09-24 16:11:32,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:32,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:11:32,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792210414] [2020-09-24 16:11:32,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:11:32,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:11:32,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:11:32,282 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2020-09-24 16:11:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:32,514 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-24 16:11:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:11:32,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-24 16:11:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:32,516 INFO L225 Difference]: With dead ends: 64 [2020-09-24 16:11:32,516 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 16:11:32,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:11:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 16:11:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-24 16:11:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 16:11:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-24 16:11:32,526 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2020-09-24 16:11:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:32,526 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-24 16:11:32,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:11:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-24 16:11:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 16:11:32,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:32,528 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:32,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:11:32,528 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 4 times [2020-09-24 16:11:32,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:32,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785076086] [2020-09-24 16:11:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,551 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,552 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,552 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,552 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 16:11:32,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 16:11:32,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 16:11:32,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:32,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 16:11:32,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:32,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,613 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,613 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,613 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,613 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:32,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:32,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:32,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:32,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:32,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785076086] [2020-09-24 16:11:32,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:32,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 16:11:32,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167703112] [2020-09-24 16:11:32,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:11:32,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:11:32,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:11:32,622 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-09-24 16:11:32,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:32,720 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-09-24 16:11:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 16:11:32,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-24 16:11:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:32,721 INFO L225 Difference]: With dead ends: 86 [2020-09-24 16:11:32,722 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 16:11:32,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:11:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 16:11:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-09-24 16:11:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 16:11:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-24 16:11:32,729 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 51 [2020-09-24 16:11:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:32,729 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-24 16:11:32,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:11:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-24 16:11:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 16:11:32,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:32,731 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:32,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:11:32,731 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:32,732 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 4 times [2020-09-24 16:11:32,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:32,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124962891] [2020-09-24 16:11:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,789 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,790 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,790 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,790 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 16:11:32,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 16:11:32,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:11:32,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:32,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 16:11:32,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:32,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,921 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,921 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,921 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,921 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:32,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:32,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:32,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:32,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:32,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:32,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124962891] [2020-09-24 16:11:32,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:32,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 16:11:32,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181897350] [2020-09-24 16:11:32,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 16:11:32,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:32,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 16:11:32,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:11:32,932 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 13 states. [2020-09-24 16:11:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:33,108 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-09-24 16:11:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 16:11:33,108 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-09-24 16:11:33,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:33,109 INFO L225 Difference]: With dead ends: 73 [2020-09-24 16:11:33,109 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 16:11:33,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:11:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 16:11:33,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-09-24 16:11:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-24 16:11:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-24 16:11:33,117 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2020-09-24 16:11:33,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:33,117 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-24 16:11:33,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 16:11:33,117 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-24 16:11:33,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 16:11:33,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:33,118 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:33,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:11:33,119 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 5 times [2020-09-24 16:11:33,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:33,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906762046] [2020-09-24 16:11:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,146 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,146 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,146 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,146 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 16:11:33,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 16:11:33,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:11:33,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:33,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 16:11:33,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:33,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,215 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,215 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,215 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,215 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:33,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:33,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:33,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:33,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:33,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:33,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906762046] [2020-09-24 16:11:33,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:33,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 16:11:33,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29064493] [2020-09-24 16:11:33,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:11:33,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:33,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:11:33,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:11:33,224 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2020-09-24 16:11:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:33,346 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-09-24 16:11:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 16:11:33,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-09-24 16:11:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:33,348 INFO L225 Difference]: With dead ends: 95 [2020-09-24 16:11:33,348 INFO L226 Difference]: Without dead ends: 79 [2020-09-24 16:11:33,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:11:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-24 16:11:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-09-24 16:11:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 16:11:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-09-24 16:11:33,356 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2020-09-24 16:11:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:33,356 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-09-24 16:11:33,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:11:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-09-24 16:11:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 16:11:33,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:33,358 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:33,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 16:11:33,358 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:33,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:33,358 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 5 times [2020-09-24 16:11:33,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:33,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960597628] [2020-09-24 16:11:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,442 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,443 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,443 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,444 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 16:11:33,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 16:11:33,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:11:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-24 16:11:33,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:33,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,630 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,630 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,631 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,631 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:33,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:33,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:33,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:33,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960597628] [2020-09-24 16:11:33,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:33,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 16:11:33,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502291817] [2020-09-24 16:11:33,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 16:11:33,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 16:11:33,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:11:33,645 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 15 states. [2020-09-24 16:11:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:33,886 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-09-24 16:11:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 16:11:33,886 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-09-24 16:11:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:33,887 INFO L225 Difference]: With dead ends: 82 [2020-09-24 16:11:33,887 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 16:11:33,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:11:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 16:11:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-24 16:11:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 16:11:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-09-24 16:11:33,894 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 62 [2020-09-24 16:11:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:33,895 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-09-24 16:11:33,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 16:11:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-09-24 16:11:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 16:11:33,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:33,896 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:33,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 16:11:33,896 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:33,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 6 times [2020-09-24 16:11:33,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:33,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774621881] [2020-09-24 16:11:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,925 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,925 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,926 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,926 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 16:11:33,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 16:11:33,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 16:11:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 16:11:33,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:33,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,999 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:34,000 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:34,000 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:34,000 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:34,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:34,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:34,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:34,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:34,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:34,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774621881] [2020-09-24 16:11:34,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:34,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 16:11:34,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410447455] [2020-09-24 16:11:34,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 16:11:34,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:34,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 16:11:34,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:11:34,009 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 10 states. [2020-09-24 16:11:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:34,155 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-09-24 16:11:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 16:11:34,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 16:11:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:34,157 INFO L225 Difference]: With dead ends: 104 [2020-09-24 16:11:34,157 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 16:11:34,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-09-24 16:11:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 16:11:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-09-24 16:11:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 16:11:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-09-24 16:11:34,163 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2020-09-24 16:11:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:34,164 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-09-24 16:11:34,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 16:11:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-09-24 16:11:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 16:11:34,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:34,165 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:34,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 16:11:34,165 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:34,166 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 6 times [2020-09-24 16:11:34,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:34,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401456106] [2020-09-24 16:11:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:34,228 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:34,228 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:34,228 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:34,228 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:34,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 16:11:34,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:34,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 16:11:34,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:34,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:11:34,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:34,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 16:11:34,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:34,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:34,411 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:34,412 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:34,412 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:34,412 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:34,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:34,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:34,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:34,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:34,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:34,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401456106] [2020-09-24 16:11:34,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:34,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 16:11:34,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653702503] [2020-09-24 16:11:34,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 16:11:34,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:34,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 16:11:34,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-24 16:11:34,426 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-09-24 16:11:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:34,784 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-09-24 16:11:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 16:11:34,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-09-24 16:11:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:34,786 INFO L225 Difference]: With dead ends: 91 [2020-09-24 16:11:34,786 INFO L226 Difference]: Without dead ends: 84 [2020-09-24 16:11:34,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:11:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-24 16:11:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-09-24 16:11:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 16:11:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-24 16:11:34,796 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2020-09-24 16:11:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:34,796 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-24 16:11:34,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 16:11:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-24 16:11:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 16:11:34,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:34,798 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:34,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 16:11:34,798 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:34,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 7 times [2020-09-24 16:11:34,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:34,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817819143] [2020-09-24 16:11:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:34,835 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:34,836 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:34,836 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:34,836 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:34,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 16:11:34,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:34,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 16:11:34,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:34,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:11:34,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:34,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 16:11:34,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:34,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:34,936 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:34,936 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:34,938 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:34,939 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:34,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:34,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:34,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:11:34,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:34,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:34,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:34,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:34,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 7 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:34,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817819143] [2020-09-24 16:11:34,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:34,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:11:34,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368900712] [2020-09-24 16:11:34,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:11:34,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:34,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:11:34,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:11:34,957 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 11 states. [2020-09-24 16:11:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:35,128 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-09-24 16:11:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 16:11:35,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-09-24 16:11:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:35,130 INFO L225 Difference]: With dead ends: 113 [2020-09-24 16:11:35,130 INFO L226 Difference]: Without dead ends: 97 [2020-09-24 16:11:35,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:11:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-24 16:11:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-09-24 16:11:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-24 16:11:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-09-24 16:11:35,141 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 78 [2020-09-24 16:11:35,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:35,141 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-09-24 16:11:35,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:11:35,142 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-09-24 16:11:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-24 16:11:35,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:35,142 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:35,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 16:11:35,143 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 7 times [2020-09-24 16:11:35,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:35,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498573473] [2020-09-24 16:11:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:35,214 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:35,214 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:35,214 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:35,215 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:35,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-24 16:11:35,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:35,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 16:11:35,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:35,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:11:35,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:35,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 16:11:35,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:35,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:35,457 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:35,457 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:35,457 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:35,457 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:35,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:35,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:35,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:35,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:35,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:35,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:35,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:35,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498573473] [2020-09-24 16:11:35,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:35,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 16:11:35,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965354717] [2020-09-24 16:11:35,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 16:11:35,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 16:11:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:11:35,474 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 19 states. [2020-09-24 16:11:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:35,842 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-09-24 16:11:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 16:11:35,843 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-09-24 16:11:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:35,844 INFO L225 Difference]: With dead ends: 100 [2020-09-24 16:11:35,844 INFO L226 Difference]: Without dead ends: 93 [2020-09-24 16:11:35,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:11:35,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-24 16:11:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-09-24 16:11:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 16:11:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-09-24 16:11:35,852 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 80 [2020-09-24 16:11:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:35,853 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-09-24 16:11:35,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 16:11:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-09-24 16:11:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-24 16:11:35,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:35,854 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:35,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 16:11:35,854 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:35,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:35,855 INFO L82 PathProgramCache]: Analyzing trace with hash -326571328, now seen corresponding path program 8 times [2020-09-24 16:11:35,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:35,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145268252] [2020-09-24 16:11:35,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:35,895 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:35,895 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:35,896 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:35,896 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:35,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-24 16:11:35,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:35,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 16:11:35,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:35,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 16:11:35,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:35,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 16:11:35,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:36,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:36,002 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:36,002 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:36,002 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:36,003 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:36,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:36,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:36,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:36,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:36,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:36,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:36,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:36,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:36,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145268252] [2020-09-24 16:11:36,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:36,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 16:11:36,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852142411] [2020-09-24 16:11:36,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 16:11:36,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:36,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 16:11:36,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:11:36,014 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 12 states. [2020-09-24 16:11:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:36,202 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-09-24 16:11:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 16:11:36,203 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-09-24 16:11:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:36,204 INFO L225 Difference]: With dead ends: 122 [2020-09-24 16:11:36,204 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 16:11:36,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:11:36,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 16:11:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2020-09-24 16:11:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-24 16:11:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-09-24 16:11:36,209 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 87 [2020-09-24 16:11:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:36,210 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-09-24 16:11:36,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 16:11:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-09-24 16:11:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 16:11:36,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:36,211 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:36,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 16:11:36,212 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1680774973, now seen corresponding path program 8 times [2020-09-24 16:11:36,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:36,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625936994] [2020-09-24 16:11:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:36,359 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:36,360 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:36,360 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:36,360 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:36,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 16:11:36,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:36,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-24 16:11:36,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:36,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:11:36,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:36,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 16:11:36,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:36,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:36,656 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:36,656 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:36,656 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:36,657 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:36,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:36,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:36,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:36,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:36,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:36,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:36,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:36,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625936994] [2020-09-24 16:11:36,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:36,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 16:11:36,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119948835] [2020-09-24 16:11:36,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 16:11:36,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:36,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 16:11:36,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:11:36,684 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2020-09-24 16:11:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:37,140 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-09-24 16:11:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 16:11:37,141 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-09-24 16:11:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:37,142 INFO L225 Difference]: With dead ends: 109 [2020-09-24 16:11:37,142 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 16:11:37,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:11:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 16:11:37,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-09-24 16:11:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-24 16:11:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-09-24 16:11:37,149 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 89 [2020-09-24 16:11:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:37,149 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-09-24 16:11:37,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 16:11:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-09-24 16:11:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 16:11:37,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:37,151 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:37,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 16:11:37,152 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:37,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1953349334, now seen corresponding path program 9 times [2020-09-24 16:11:37,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:37,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393209671] [2020-09-24 16:11:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:37,192 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:37,192 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:37,193 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:37,193 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:37,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 16:11:37,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:37,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 16:11:37,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:37,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:11:37,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:37,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-24 16:11:37,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:37,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:37,319 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:37,319 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:37,319 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:37,319 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:37,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:37,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:37,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:37,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:37,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:37,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:37,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:37,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 9 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:37,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393209671] [2020-09-24 16:11:37,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:37,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 16:11:37,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25993383] [2020-09-24 16:11:37,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 16:11:37,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 16:11:37,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:11:37,332 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 13 states. [2020-09-24 16:11:37,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:37,511 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2020-09-24 16:11:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 16:11:37,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-09-24 16:11:37,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:37,512 INFO L225 Difference]: With dead ends: 131 [2020-09-24 16:11:37,512 INFO L226 Difference]: Without dead ends: 115 [2020-09-24 16:11:37,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:11:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-24 16:11:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-09-24 16:11:37,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-24 16:11:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-09-24 16:11:37,518 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 96 [2020-09-24 16:11:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:37,518 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-09-24 16:11:37,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 16:11:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-09-24 16:11:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-24 16:11:37,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:37,520 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:37,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 16:11:37,520 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:37,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1110339751, now seen corresponding path program 9 times [2020-09-24 16:11:37,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:37,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238623228] [2020-09-24 16:11:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:37,653 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:37,654 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:37,654 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:37,654 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:37,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-09-24 16:11:37,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:37,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-09-24 16:11:37,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:37,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 16:11:37,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:37,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-24 16:11:37,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:38,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:38,065 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:38,065 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:38,065 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:38,066 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:38,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:38,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:38,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:38,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:38,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:38,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:38,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:38,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238623228] [2020-09-24 16:11:38,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:38,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 16:11:38,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291771060] [2020-09-24 16:11:38,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 16:11:38,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:38,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 16:11:38,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:11:38,110 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 23 states. [2020-09-24 16:11:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:38,756 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2020-09-24 16:11:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 16:11:38,756 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-09-24 16:11:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:38,757 INFO L225 Difference]: With dead ends: 118 [2020-09-24 16:11:38,757 INFO L226 Difference]: Without dead ends: 111 [2020-09-24 16:11:38,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 16:11:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-24 16:11:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-09-24 16:11:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-24 16:11:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-09-24 16:11:38,763 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 98 [2020-09-24 16:11:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:38,764 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-09-24 16:11:38,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 16:11:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-09-24 16:11:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-24 16:11:38,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:38,765 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:38,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 16:11:38,766 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:38,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1560748928, now seen corresponding path program 10 times [2020-09-24 16:11:38,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:38,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450012469] [2020-09-24 16:11:38,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:38,808 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:38,808 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:38,808 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:38,809 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:38,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-24 16:11:38,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:38,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 16:11:38,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:38,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 16:11:38,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:38,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-24 16:11:38,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:38,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:38,946 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:38,946 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:38,946 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:38,947 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:38,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:38,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:38,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:38,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:38,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:38,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:38,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:38,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 10 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:38,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450012469] [2020-09-24 16:11:38,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:38,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 16:11:38,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951346538] [2020-09-24 16:11:38,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 16:11:38,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:38,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 16:11:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-24 16:11:38,964 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 14 states. [2020-09-24 16:11:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:39,187 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2020-09-24 16:11:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 16:11:39,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-09-24 16:11:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:39,189 INFO L225 Difference]: With dead ends: 140 [2020-09-24 16:11:39,189 INFO L226 Difference]: Without dead ends: 124 [2020-09-24 16:11:39,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-09-24 16:11:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-24 16:11:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2020-09-24 16:11:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 16:11:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-24 16:11:39,196 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 105 [2020-09-24 16:11:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:39,196 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-24 16:11:39,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 16:11:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-24 16:11:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-24 16:11:39,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:39,198 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:39,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 16:11:39,198 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:39,199 INFO L82 PathProgramCache]: Analyzing trace with hash -442207869, now seen corresponding path program 10 times [2020-09-24 16:11:39,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:39,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662869573] [2020-09-24 16:11:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:39,319 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:39,319 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:39,320 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:39,320 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:39,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-09-24 16:11:39,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:39,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-24 16:11:39,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:39,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 16:11:39,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:39,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 16:11:39,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:39,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:39,736 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:39,736 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:39,736 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:39,737 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:39,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:39,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:39,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:39,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:39,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:39,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:39,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:39,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:39,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662869573] [2020-09-24 16:11:39,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:39,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 16:11:39,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694132156] [2020-09-24 16:11:39,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 16:11:39,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:39,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 16:11:39,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-09-24 16:11:39,788 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 25 states. [2020-09-24 16:11:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:40,416 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2020-09-24 16:11:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 16:11:40,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-09-24 16:11:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:40,418 INFO L225 Difference]: With dead ends: 127 [2020-09-24 16:11:40,418 INFO L226 Difference]: Without dead ends: 120 [2020-09-24 16:11:40,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 16:11:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-24 16:11:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-09-24 16:11:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-24 16:11:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-09-24 16:11:40,425 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 107 [2020-09-24 16:11:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:40,426 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-09-24 16:11:40,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 16:11:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-09-24 16:11:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-24 16:11:40,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:40,427 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:40,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 16:11:40,428 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:40,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:40,428 INFO L82 PathProgramCache]: Analyzing trace with hash -108831210, now seen corresponding path program 11 times [2020-09-24 16:11:40,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:40,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242922637] [2020-09-24 16:11:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:40,475 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:40,476 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:40,476 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:40,476 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:40,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-24 16:11:40,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:40,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 16:11:40,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:40,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:11:40,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:40,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-24 16:11:40,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:40,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:40,620 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:40,620 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:40,620 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:40,621 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:40,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:40,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:40,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:40,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:40,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 11 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:40,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242922637] [2020-09-24 16:11:40,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:40,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 16:11:40,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145377866] [2020-09-24 16:11:40,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 16:11:40,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:40,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 16:11:40,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:11:40,638 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 15 states. [2020-09-24 16:11:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:40,893 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2020-09-24 16:11:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 16:11:40,894 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 114 [2020-09-24 16:11:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:40,895 INFO L225 Difference]: With dead ends: 149 [2020-09-24 16:11:40,895 INFO L226 Difference]: Without dead ends: 133 [2020-09-24 16:11:40,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:11:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-24 16:11:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2020-09-24 16:11:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-24 16:11:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-09-24 16:11:40,905 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 114 [2020-09-24 16:11:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:40,906 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-09-24 16:11:40,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 16:11:40,906 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-09-24 16:11:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-24 16:11:40,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:40,907 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:40,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 16:11:40,910 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:40,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:40,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1409048217, now seen corresponding path program 11 times [2020-09-24 16:11:40,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:40,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278577869] [2020-09-24 16:11:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:41,088 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:41,088 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:41,089 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:41,089 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:41,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-09-24 16:11:41,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:41,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-09-24 16:11:41,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 16:11:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-24 16:11:41,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:41,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:41,482 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:41,482 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:41,483 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:41,483 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:41,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:41,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:41,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:41,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:41,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:41,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:41,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:41,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 90 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:41,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278577869] [2020-09-24 16:11:41,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:41,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 16:11:41,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767012748] [2020-09-24 16:11:41,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 16:11:41,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:41,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 16:11:41,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:11:41,521 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 27 states. [2020-09-24 16:11:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:41,783 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2020-09-24 16:11:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 16:11:41,784 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 116 [2020-09-24 16:11:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:41,784 INFO L225 Difference]: With dead ends: 123 [2020-09-24 16:11:41,784 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 16:11:41,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 16:11:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 16:11:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 16:11:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 16:11:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 16:11:41,786 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2020-09-24 16:11:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:41,787 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 16:11:41,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 16:11:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 16:11:41,787 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 16:11:41,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 16:11:41,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 16:11:42,118 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 44 [2020-09-24 16:11:42,124 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 16:11:42,124 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 16:11:42,125 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 16:11:42,125 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 16:11:42,125 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 16:11:42,125 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 16:11:42,125 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 16:11:42,125 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 16:11:42,126 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 16:11:42,126 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 16:11:42,126 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 16:11:42,126 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-09-24 16:11:42,126 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 16:11:42,126 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 16:11:42,127 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-09-24 16:11:42,127 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-09-24 16:11:42,127 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-24 16:11:42,127 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 16:11:42,127 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-24 16:11:42,127 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-24 16:11:42,128 INFO L268 CegarLoopResult]: For program point L16-3(line 16) no Hoare annotation was computed. [2020-09-24 16:11:42,128 INFO L268 CegarLoopResult]: For program point L16-5(lines 16 19) no Hoare annotation was computed. [2020-09-24 16:11:42,128 INFO L268 CegarLoopResult]: For program point L16-6(line 16) no Hoare annotation was computed. [2020-09-24 16:11:42,128 INFO L268 CegarLoopResult]: For program point L16-7(line 16) no Hoare annotation was computed. [2020-09-24 16:11:42,128 INFO L268 CegarLoopResult]: For program point L16-9(line 16) no Hoare annotation was computed. [2020-09-24 16:11:42,128 INFO L268 CegarLoopResult]: For program point L16-10(line 16) no Hoare annotation was computed. [2020-09-24 16:11:42,130 INFO L264 CegarLoopResult]: At program point L16-11(lines 16 19) the Hoare annotation is: (let ((.cse2 (<= 4 main_~y~0)) (.cse1 (* 2 main_~y~0)) (.cse0 (+ main_~x~0 main_~y~0))) (or (and (<= main_~y~0 0) (<= 0 main_~y~0) (<= 1 .cse0)) (and (<= (+ .cse1 3) main_~x~0) .cse2) (and (<= main_~y~0 4) .cse2 (<= 19 (+ main_~x~0 (* 3 main_~y~0)))) (and (<= main_~y~0 3) (<= 3 main_~y~0) (<= 19 (+ main_~x~0 (* 5 main_~y~0)))) (and (<= 1 main_~y~0) (<= main_~y~0 main_~x~0) (<= main_~y~0 1)) (and .cse2 (<= main_~y~0 5) (<= 21 (+ main_~x~0 .cse1))) (and (<= 2 main_~y~0) (<= main_~y~0 2) (<= 4 .cse0)))) [2020-09-24 16:11:42,130 INFO L264 CegarLoopResult]: At program point L16-12(lines 16 19) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2020-09-24 16:11:42,131 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 16:11:42,131 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 16:11:42,131 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 16:11:42,131 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 16:11:42,131 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 16:11:42,131 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 16:11:42,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 04:11:42 BoogieIcfgContainer [2020-09-24 16:11:42,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 16:11:42,175 INFO L168 Benchmark]: Toolchain (without parser) took 12972.61 ms. Allocated memory was 141.0 MB in the beginning and 356.5 MB in the end (delta: 215.5 MB). Free memory was 104.3 MB in the beginning and 139.3 MB in the end (delta: -35.0 MB). Peak memory consumption was 180.5 MB. Max. memory is 7.1 GB. [2020-09-24 16:11:42,176 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-24 16:11:42,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.02 ms. Allocated memory is still 141.0 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 16:11:42,178 INFO L168 Benchmark]: Boogie Preprocessor took 112.35 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.2 MB in the beginning and 183.7 MB in the end (delta: -89.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-24 16:11:42,183 INFO L168 Benchmark]: RCFGBuilder took 328.67 ms. Allocated memory is still 203.9 MB. Free memory was 183.7 MB in the beginning and 169.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-09-24 16:11:42,187 INFO L168 Benchmark]: TraceAbstraction took 12210.57 ms. Allocated memory was 203.9 MB in the beginning and 356.5 MB in the end (delta: 152.6 MB). Free memory was 169.3 MB in the beginning and 139.3 MB in the end (delta: 30.0 MB). Peak memory consumption was 182.6 MB. Max. memory is 7.1 GB. [2020-09-24 16:11:42,192 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.02 ms. Allocated memory is still 141.0 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.35 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.2 MB in the beginning and 183.7 MB in the end (delta: -89.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 328.67 ms. Allocated memory is still 203.9 MB. Free memory was 183.7 MB in the beginning and 169.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12210.57 ms. Allocated memory was 203.9 MB in the beginning and 356.5 MB in the end (delta: 152.6 MB). Free memory was 169.3 MB in the beginning and 139.3 MB in the end (delta: 30.0 MB). Peak memory consumption was 182.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (((((((y <= 0 && 0 <= y) && 1 <= x + y) || (2 * y + 3 <= x && 4 <= y)) || ((y <= 4 && 4 <= y) && 19 <= x + 3 * y)) || ((y <= 3 && 3 <= y) && 19 <= x + 5 * y)) || ((1 <= y && y <= x) && y <= 1)) || ((4 <= y && y <= 5) && 21 <= x + 2 * y)) || ((2 <= y && y <= 2) && 4 <= x + y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.6s, OverallIterations: 25, TraceHistogramMax: 12, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 841 SDtfs, 1809 SDslu, 6597 SDs, 0 SdLazy, 2872 SolverSat, 290 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 541 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=123occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 154 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 31 PreInvPairs, 55 NumberOfFragments, 96 HoareAnnotationTreeSize, 31 FomulaSimplifications, 175 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 349 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 1583 NumberOfCodeBlocks, 1583 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1558 ConstructedInterpolants, 0 QuantifiedInterpolants, 532869 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 156/4488 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...