/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-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:11:41,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:11:41,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:11:41,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:11:41,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:11:41,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:11:41,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:11:41,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:11:41,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:11:41,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:11:41,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:11:41,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:11:41,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:11:41,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:11:41,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:11:41,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:11:41,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:11:41,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:11:41,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:11:41,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:11:41,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:11:41,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:11:41,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:11:41,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:11:41,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:11:41,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:11:41,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:11:41,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:11:41,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:11:41,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:11:41,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:11:41,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:11:41,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:11:41,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:11:41,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:11:41,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:11:41,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:11:41,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:11:41,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:11:41,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:11:41,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:11:41,436 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 16:11:41,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:11:41,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:11:41,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:11:41,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:11:41,488 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:11:41,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:11:41,488 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:11:41,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:11:41,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:11:41,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:11:41,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:11:41,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:11:41,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:11:41,490 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:11:41,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:11:41,490 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:11:41,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:11:41,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:11:41,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:11:41,491 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:11:41,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:11:41,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:11:41,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:11:41,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:11:41,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:11:41,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:11:41,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:11:41,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:11:41,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:11:41,493 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 16:11:41,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:11:41,974 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:11:41,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:11:41,981 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:11:41,981 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:11:41,982 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2020-09-24 16:11:42,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48ee1b210/75d9064bc31f4da4a9a9e7bdac3dd634/FLAG382867e7e [2020-09-24 16:11:42,592 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:11:42,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_1.i [2020-09-24 16:11:42,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48ee1b210/75d9064bc31f4da4a9a9e7bdac3dd634/FLAG382867e7e [2020-09-24 16:11:42,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48ee1b210/75d9064bc31f4da4a9a9e7bdac3dd634 [2020-09-24 16:11:42,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:11:42,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:11:42,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:11:42,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:11:42,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:11:42,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:11:42" (1/1) ... [2020-09-24 16:11:42,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12755b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:42, skipping insertion in model container [2020-09-24 16:11:42,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:11:42" (1/1) ... [2020-09-24 16:11:42,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:11:43,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:11:43,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:11:43,227 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:11:43,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:11:43,262 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:11:43,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:43 WrapperNode [2020-09-24 16:11:43,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:11:43,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:11:43,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:11:43,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:11:43,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:43" (1/1) ... [2020-09-24 16:11:43,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:43" (1/1) ... [2020-09-24 16:11:43,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:43" (1/1) ... [2020-09-24 16:11:43,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:43" (1/1) ... [2020-09-24 16:11:43,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:43" (1/1) ... [2020-09-24 16:11:43,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:43" (1/1) ... [2020-09-24 16:11:43,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:43" (1/1) ... [2020-09-24 16:11:43,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:11:43,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:11:43,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:11:43,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:11:43,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:43" (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 16:11:43,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:11:43,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:11:43,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 16:11:43,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:11:43,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:11:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:11:43,452 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 16:11:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 16:11:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:11:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 16:11:43,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:11:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:11:43,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:11:43,655 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:11:43,655 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 16:11:43,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:11:43 BoogieIcfgContainer [2020-09-24 16:11:43,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:11:43,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:11:43,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:11:43,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:11:43,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:11:42" (1/3) ... [2020-09-24 16:11:43,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322e09f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:11:43, skipping insertion in model container [2020-09-24 16:11:43,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:43" (2/3) ... [2020-09-24 16:11:43,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322e09f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:11:43, skipping insertion in model container [2020-09-24 16:11:43,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:11:43" (3/3) ... [2020-09-24 16:11:43,670 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2020-09-24 16:11:43,681 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:11:43,691 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:11:43,714 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:11:43,746 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:11:43,746 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:11:43,747 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:11:43,747 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:11:43,747 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:11:43,747 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:11:43,747 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:11:43,748 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:11:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-24 16:11:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 16:11:43,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:43,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:43,780 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:43,788 INFO L82 PathProgramCache]: Analyzing trace with hash 574813456, now seen corresponding path program 1 times [2020-09-24 16:11:43,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:43,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572352865] [2020-09-24 16:11:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:43,924 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:43,924 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:43,925 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:43,925 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:43,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 16:11:43,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:43,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 16:11:43,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:11:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:43,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 16:11:43,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:43,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:43,988 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:43,988 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:43,989 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:43,989 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:43,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:43,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:43,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:11:43,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:43,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:43,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:43,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:44,002 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 16:11:44,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572352865] [2020-09-24 16:11:44,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:11:44,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 16:11:44,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860664557] [2020-09-24 16:11:44,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 16:11:44,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:44,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 16:11:44,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:11:44,043 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-09-24 16:11:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:44,130 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-09-24 16:11:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 16:11:44,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-24 16:11:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:44,176 INFO L225 Difference]: With dead ends: 37 [2020-09-24 16:11:44,176 INFO L226 Difference]: Without dead ends: 18 [2020-09-24 16:11:44,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:11:44,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-24 16:11:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-09-24 16:11:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-24 16:11:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-24 16:11:44,260 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-24 16:11:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:44,260 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-24 16:11:44,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 16:11:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-24 16:11:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-24 16:11:44,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:44,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:44,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:11:44,262 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1625616653, now seen corresponding path program 1 times [2020-09-24 16:11:44,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:44,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616516611] [2020-09-24 16:11:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:44,301 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:44,302 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:44,302 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:44,302 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:44,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 16:11:44,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:44,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 16:11:44,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:44,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:11:44,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:44,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 16:11:44,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:44,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:44,361 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:44,361 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:44,361 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:44,362 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:44,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:44,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:44,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:11:44,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:44,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:44,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616516611] [2020-09-24 16:11:44,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:44,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 16:11:44,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451866962] [2020-09-24 16:11:44,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:11:44,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:11:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:11:44,373 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-09-24 16:11:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:44,449 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-09-24 16:11:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:11:44,449 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-24 16:11:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:44,451 INFO L225 Difference]: With dead ends: 27 [2020-09-24 16:11:44,451 INFO L226 Difference]: Without dead ends: 22 [2020-09-24 16:11:44,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:11:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-24 16:11:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-09-24 16:11:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-24 16:11:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-09-24 16:11:44,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2020-09-24 16:11:44,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:44,459 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-09-24 16:11:44,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:11:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-09-24 16:11:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 16:11:44,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:44,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:44,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:11:44,462 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:44,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:44,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1174316682, now seen corresponding path program 2 times [2020-09-24 16:11:44,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:44,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029539035] [2020-09-24 16:11:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:44,501 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:44,502 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:44,502 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:44,502 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:44,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 16:11:44,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:44,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 16:11:44,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:44,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:11:44,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:44,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 16:11:44,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:44,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:44,582 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:44,582 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:44,582 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:44,583 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:44,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:44,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:44,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:44,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:44,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:44,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:44,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029539035] [2020-09-24 16:11:44,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:44,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 16:11:44,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820977639] [2020-09-24 16:11:44,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:11:44,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:44,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:11:44,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:11:44,594 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-09-24 16:11:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:44,683 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-24 16:11:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 16:11:44,684 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-24 16:11:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:44,685 INFO L225 Difference]: With dead ends: 31 [2020-09-24 16:11:44,685 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 16:11:44,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:11:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 16:11:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-09-24 16:11:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-24 16:11:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-09-24 16:11:44,692 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2020-09-24 16:11:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:44,693 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-09-24 16:11:44,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:11:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-09-24 16:11:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 16:11:44,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:44,694 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:44,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:11:44,695 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:44,695 INFO L82 PathProgramCache]: Analyzing trace with hash -199797369, now seen corresponding path program 3 times [2020-09-24 16:11:44,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:44,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939008867] [2020-09-24 16:11:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:44,770 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:44,771 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:44,771 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:44,771 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:44,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 16:11:44,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:44,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 16:11:44,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:44,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:11:44,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:44,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 16:11:44,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:44,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:44,886 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:44,887 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:44,887 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:44,887 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:44,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:44,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:44,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:44,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:44,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:44,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:44,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:44,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:44,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939008867] [2020-09-24 16:11:44,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:44,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 16:11:44,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580526519] [2020-09-24 16:11:44,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:11:44,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:44,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:11:44,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:11:44,897 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-09-24 16:11:45,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:45,029 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-24 16:11:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:11:45,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-09-24 16:11:45,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:45,031 INFO L225 Difference]: With dead ends: 35 [2020-09-24 16:11:45,031 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 16:11:45,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:11:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 16:11:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-24 16:11:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 16:11:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-09-24 16:11:45,038 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 23 [2020-09-24 16:11:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:45,038 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-09-24 16:11:45,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:11:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-09-24 16:11:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 16:11:45,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:45,040 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:45,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:11:45,040 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:45,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2014723588, now seen corresponding path program 4 times [2020-09-24 16:11:45,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:45,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486147691] [2020-09-24 16:11:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:45,090 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:45,091 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:45,091 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:45,091 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:45,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 16:11:45,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:45,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 16:11:45,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:11:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:45,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 16:11:45,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 16:11:45,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:45,231 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:45,231 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:45,231 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:45,231 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:45,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:45,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:45,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:45,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:45,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:45,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:45,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486147691] [2020-09-24 16:11:45,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:45,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:11:45,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523547643] [2020-09-24 16:11:45,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:11:45,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:45,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:11:45,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:11:45,239 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-09-24 16:11:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:45,382 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-24 16:11:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 16:11:45,383 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-24 16:11:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:45,384 INFO L225 Difference]: With dead ends: 39 [2020-09-24 16:11:45,384 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 16:11:45,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:11:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 16:11:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-24 16:11:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 16:11:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 16:11:45,391 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2020-09-24 16:11:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:45,391 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 16:11:45,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:11:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 16:11:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 16:11:45,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:45,393 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:45,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:11:45,393 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1723686911, now seen corresponding path program 5 times [2020-09-24 16:11:45,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:45,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936406348] [2020-09-24 16:11:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:45,444 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:45,445 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:45,445 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:45,445 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:45,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 16:11:45,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:45,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 16:11:45,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:45,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:11:45,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:45,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 16:11:45,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:45,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:45,584 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:45,584 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:45,584 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:45,585 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:45,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:45,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:45,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:11:45,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:45,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:45,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:45,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:45,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 16:11:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:45,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936406348] [2020-09-24 16:11:45,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:45,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 16:11:45,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437742726] [2020-09-24 16:11:45,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 16:11:45,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:45,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 16:11:45,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:11:45,601 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 13 states. [2020-09-24 16:11:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:45,834 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-09-24 16:11:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 16:11:45,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-09-24 16:11:45,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:45,836 INFO L225 Difference]: With dead ends: 43 [2020-09-24 16:11:45,837 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 16:11:45,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:11:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 16:11:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-24 16:11:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 16:11:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-09-24 16:11:45,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 31 [2020-09-24 16:11:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:45,852 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-09-24 16:11:45,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 16:11:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-09-24 16:11:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 16:11:45,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:45,854 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:45,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:11:45,854 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:45,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1455178882, now seen corresponding path program 6 times [2020-09-24 16:11:45,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:45,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994725808] [2020-09-24 16:11:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:45,978 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:45,978 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:45,978 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:45,979 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:45,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 16:11:45,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:45,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-24 16:11:45,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:11:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 16:11:45,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:46,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:46,166 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:46,166 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:46,166 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:46,167 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:46,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:46,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:46,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:46,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:46,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:46,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994725808] [2020-09-24 16:11:46,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:46,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 16:11:46,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585358394] [2020-09-24 16:11:46,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 16:11:46,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:46,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 16:11:46,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:11:46,174 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 15 states. [2020-09-24 16:11:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:46,393 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-09-24 16:11:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 16:11:46,394 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-09-24 16:11:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:46,395 INFO L225 Difference]: With dead ends: 47 [2020-09-24 16:11:46,395 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 16:11:46,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:11:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 16:11:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-24 16:11:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 16:11:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-09-24 16:11:46,402 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 35 [2020-09-24 16:11:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:46,403 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-09-24 16:11:46,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 16:11:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-09-24 16:11:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 16:11:46,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:46,404 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:46,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:11:46,405 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1411436667, now seen corresponding path program 7 times [2020-09-24 16:11:46,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:46,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375164898] [2020-09-24 16:11:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:46,466 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:46,466 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:46,467 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:46,467 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:46,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 16:11:46,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:46,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 16:11:46,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:11:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 16:11:46,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:46,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:46,650 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:46,650 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:46,650 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:46,650 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:46,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:46,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:46,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:46,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:46,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375164898] [2020-09-24 16:11:46,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:46,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 16:11:46,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312248836] [2020-09-24 16:11:46,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 16:11:46,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 16:11:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-24 16:11:46,658 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 17 states. [2020-09-24 16:11:46,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:46,947 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-24 16:11:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 16:11:46,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-09-24 16:11:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:46,952 INFO L225 Difference]: With dead ends: 51 [2020-09-24 16:11:46,952 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 16:11:46,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:11:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 16:11:46,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-09-24 16:11:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 16:11:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-09-24 16:11:46,970 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 39 [2020-09-24 16:11:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:46,970 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-09-24 16:11:46,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 16:11:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-09-24 16:11:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 16:11:46,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:46,971 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:46,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:11:46,971 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:46,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:46,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1883315960, now seen corresponding path program 8 times [2020-09-24 16:11:46,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:46,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71807480] [2020-09-24 16:11:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:47,081 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:47,082 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:47,082 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:47,082 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:47,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 16:11:47,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:47,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-24 16:11:47,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:47,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:11:47,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:47,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 16:11:47,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:47,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:47,287 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:47,287 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:47,288 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:47,288 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:47,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:47,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:47,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:47,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:47,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:47,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:47,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71807480] [2020-09-24 16:11:47,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:47,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 16:11:47,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548364677] [2020-09-24 16:11:47,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 16:11:47,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:47,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 16:11:47,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:11:47,303 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 19 states. [2020-09-24 16:11:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:47,644 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-09-24 16:11:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 16:11:47,645 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-09-24 16:11:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:47,646 INFO L225 Difference]: With dead ends: 55 [2020-09-24 16:11:47,646 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 16:11:47,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:11:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 16:11:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-09-24 16:11:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-24 16:11:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-09-24 16:11:47,653 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 43 [2020-09-24 16:11:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:47,653 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-09-24 16:11:47,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 16:11:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-09-24 16:11:47,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 16:11:47,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:47,655 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:47,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:11:47,655 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:47,656 INFO L82 PathProgramCache]: Analyzing trace with hash -831789323, now seen corresponding path program 9 times [2020-09-24 16:11:47,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:47,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214422051] [2020-09-24 16:11:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:47,726 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:47,726 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:47,726 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:47,727 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:47,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-24 16:11:47,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:47,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 16:11:47,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:47,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:11:47,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:47,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 16:11:47,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:47,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:47,965 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:47,966 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:47,966 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:47,966 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:47,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:47,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:47,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:47,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:47,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:47,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:47,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:47,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:47,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214422051] [2020-09-24 16:11:47,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:47,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 16:11:47,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613842776] [2020-09-24 16:11:47,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 16:11:47,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:47,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 16:11:47,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:11:47,973 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 21 states. [2020-09-24 16:11:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:48,411 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-09-24 16:11:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 16:11:48,411 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-09-24 16:11:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:48,412 INFO L225 Difference]: With dead ends: 59 [2020-09-24 16:11:48,413 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 16:11:48,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=984, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 16:11:48,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 16:11:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-09-24 16:11:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 16:11:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-24 16:11:48,420 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 47 [2020-09-24 16:11:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:48,421 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-24 16:11:48,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 16:11:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-24 16:11:48,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 16:11:48,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:48,422 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:48,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:11:48,422 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:48,423 INFO L82 PathProgramCache]: Analyzing trace with hash 164128882, now seen corresponding path program 10 times [2020-09-24 16:11:48,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:48,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793380989] [2020-09-24 16:11:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:48,503 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:48,504 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:48,504 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:48,504 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:48,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 16:11:48,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:48,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-24 16:11:48,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:48,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 16:11:48,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:48,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 16:11:48,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:48,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:48,755 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:48,755 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:48,755 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:48,756 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:48,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:48,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:48,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:48,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:48,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:48,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:48,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:48,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:48,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793380989] [2020-09-24 16:11:48,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:48,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 16:11:48,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911331258] [2020-09-24 16:11:48,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 16:11:48,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:48,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 16:11:48,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:11:48,765 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 23 states. [2020-09-24 16:11:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:49,276 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-09-24 16:11:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 16:11:49,276 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-09-24 16:11:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:49,278 INFO L225 Difference]: With dead ends: 63 [2020-09-24 16:11:49,278 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 16:11:49,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 16:11:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 16:11:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-09-24 16:11:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 16:11:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-09-24 16:11:49,285 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 51 [2020-09-24 16:11:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:49,285 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-09-24 16:11:49,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 16:11:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-09-24 16:11:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 16:11:49,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:49,287 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:49,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:11:49,287 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:49,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:49,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1474159471, now seen corresponding path program 11 times [2020-09-24 16:11:49,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:49,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584460929] [2020-09-24 16:11:49,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:49,377 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:49,377 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:49,377 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:49,378 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:49,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:11:49,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:49,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-24 16:11:49,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:49,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 16:11:49,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:49,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 16:11:49,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:49,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:49,727 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:49,727 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:49,727 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:49,728 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:49,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:49,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:49,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:49,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:49,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:49,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:49,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:49,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:49,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584460929] [2020-09-24 16:11:49,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:49,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 16:11:49,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449767379] [2020-09-24 16:11:49,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 16:11:49,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:49,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 16:11:49,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-24 16:11:49,735 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 25 states. [2020-09-24 16:11:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:50,320 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-09-24 16:11:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 16:11:50,321 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-09-24 16:11:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:50,322 INFO L225 Difference]: With dead ends: 67 [2020-09-24 16:11:50,322 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 16:11:50,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 16:11:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 16:11:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-09-24 16:11:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 16:11:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-09-24 16:11:50,334 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 55 [2020-09-24 16:11:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:50,334 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-09-24 16:11:50,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 16:11:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-09-24 16:11:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 16:11:50,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:50,338 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:50,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 16:11:50,339 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:50,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:50,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1486067692, now seen corresponding path program 12 times [2020-09-24 16:11:50,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:50,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669439400] [2020-09-24 16:11:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:50,441 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:50,441 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:50,442 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:50,442 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:50,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 16:11:50,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:50,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-24 16:11:50,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:50,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 16:11:50,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:50,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 16:11:50,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:50,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:50,814 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:50,814 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:50,814 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:50,814 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:50,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:50,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:50,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:50,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:50,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:50,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:50,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:50,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:50,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669439400] [2020-09-24 16:11:50,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:50,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 16:11:50,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678593930] [2020-09-24 16:11:50,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 16:11:50,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 16:11:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:11:50,821 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 27 states. [2020-09-24 16:11:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:51,515 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-24 16:11:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-24 16:11:51,516 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-09-24 16:11:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:51,517 INFO L225 Difference]: With dead ends: 71 [2020-09-24 16:11:51,517 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 16:11:51,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=843, Invalid=1707, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 16:11:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 16:11:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-09-24 16:11:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 16:11:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-09-24 16:11:51,526 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 59 [2020-09-24 16:11:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:51,526 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-09-24 16:11:51,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 16:11:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-09-24 16:11:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 16:11:51,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:51,528 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:51,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 16:11:51,528 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash -433011223, now seen corresponding path program 13 times [2020-09-24 16:11:51,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:51,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736814419] [2020-09-24 16:11:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:51,640 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:51,640 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:51,640 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:51,641 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:51,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 16:11:51,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:51,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-24 16:11:51,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:51,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 16:11:51,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:51,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 16:11:51,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:52,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:52,030 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:52,030 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:52,030 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:52,030 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:52,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:52,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:52,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:52,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:52,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:52,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:52,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:52,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736814419] [2020-09-24 16:11:52,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:52,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 16:11:52,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649602232] [2020-09-24 16:11:52,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 16:11:52,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 16:11:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-09-24 16:11:52,038 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 29 states. [2020-09-24 16:11:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:52,761 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-09-24 16:11:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 16:11:52,761 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-09-24 16:11:52,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:52,762 INFO L225 Difference]: With dead ends: 75 [2020-09-24 16:11:52,762 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 16:11:52,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2020-09-24 16:11:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 16:11:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-09-24 16:11:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-24 16:11:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-09-24 16:11:52,770 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 63 [2020-09-24 16:11:52,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:52,770 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-09-24 16:11:52,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 16:11:52,771 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-09-24 16:11:52,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 16:11:52,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:52,772 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:52,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 16:11:52,772 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:52,773 INFO L82 PathProgramCache]: Analyzing trace with hash -446911130, now seen corresponding path program 14 times [2020-09-24 16:11:52,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:52,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020218718] [2020-09-24 16:11:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:52,902 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:52,903 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:52,903 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:52,903 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:52,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 16:11:52,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:52,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-24 16:11:52,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:52,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 16:11:52,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:52,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-24 16:11:52,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:53,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:53,332 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:53,332 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:53,332 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:53,333 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:53,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:53,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:53,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:53,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:53,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:53,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:53,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:53,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020218718] [2020-09-24 16:11:53,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:53,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-24 16:11:53,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139396306] [2020-09-24 16:11:53,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-24 16:11:53,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:53,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-24 16:11:53,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:11:53,348 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 31 states. [2020-09-24 16:11:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:54,179 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-09-24 16:11:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-24 16:11:54,179 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-09-24 16:11:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:54,180 INFO L225 Difference]: With dead ends: 79 [2020-09-24 16:11:54,180 INFO L226 Difference]: Without dead ends: 74 [2020-09-24 16:11:54,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1123, Invalid=2299, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 16:11:54,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-24 16:11:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-09-24 16:11:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 16:11:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-09-24 16:11:54,187 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 67 [2020-09-24 16:11:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:54,188 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-09-24 16:11:54,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-24 16:11:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-09-24 16:11:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 16:11:54,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:54,189 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:54,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 16:11:54,190 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:54,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash 354324067, now seen corresponding path program 15 times [2020-09-24 16:11:54,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:54,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390460746] [2020-09-24 16:11:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:54,332 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:54,333 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:54,333 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:54,333 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:54,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 16:11:54,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:54,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-09-24 16:11:54,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:54,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 16:11:54,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:54,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 16:11:54,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:54,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:54,904 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:54,905 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:54,905 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:54,905 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:54,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:54,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:54,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:54,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:54,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:54,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:54,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:54,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:54,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390460746] [2020-09-24 16:11:54,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:54,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-24 16:11:54,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162316263] [2020-09-24 16:11:54,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-24 16:11:54,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:54,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-24 16:11:54,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 16:11:54,915 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 33 states. [2020-09-24 16:11:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:55,849 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-09-24 16:11:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-24 16:11:55,850 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-09-24 16:11:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:55,851 INFO L225 Difference]: With dead ends: 83 [2020-09-24 16:11:55,851 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 16:11:55,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1278, Invalid=2628, Unknown=0, NotChecked=0, Total=3906 [2020-09-24 16:11:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 16:11:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-24 16:11:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 16:11:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-09-24 16:11:55,860 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 71 [2020-09-24 16:11:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:55,860 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-09-24 16:11:55,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-24 16:11:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-09-24 16:11:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 16:11:55,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:55,862 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:55,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 16:11:55,862 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash -555898656, now seen corresponding path program 16 times [2020-09-24 16:11:55,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:55,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467116185] [2020-09-24 16:11:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:56,037 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:56,037 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:56,037 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:56,037 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:56,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 16:11:56,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:56,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-09-24 16:11:56,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:56,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 16:11:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 16:11:56,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:56,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:56,621 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:56,621 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:56,621 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:56,621 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:56,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:56,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:56,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:56,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:56,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:56,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:56,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467116185] [2020-09-24 16:11:56,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:56,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-24 16:11:56,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086619204] [2020-09-24 16:11:56,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-24 16:11:56,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:56,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-24 16:11:56,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:11:56,638 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 35 states. [2020-09-24 16:11:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:57,666 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-09-24 16:11:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 16:11:57,667 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2020-09-24 16:11:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:57,668 INFO L225 Difference]: With dead ends: 87 [2020-09-24 16:11:57,668 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 16:11:57,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2020-09-24 16:11:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 16:11:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-09-24 16:11:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-24 16:11:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-09-24 16:11:57,682 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 75 [2020-09-24 16:11:57,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:57,682 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-09-24 16:11:57,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-24 16:11:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-09-24 16:11:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 16:11:57,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:57,684 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:57,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 16:11:57,685 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash 643906781, now seen corresponding path program 17 times [2020-09-24 16:11:57,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:57,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536733928] [2020-09-24 16:11:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:57,858 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:57,859 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:57,859 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:57,859 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:57,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-24 16:11:57,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-09-24 16:11:57,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 16:11:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 16:11:57,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:58,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:58,429 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:58,429 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:58,429 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:58,430 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:58,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:58,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:58,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:58,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:58,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:58,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:58,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:58,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:58,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536733928] [2020-09-24 16:11:58,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:58,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-24 16:11:58,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691996433] [2020-09-24 16:11:58,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-24 16:11:58,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:58,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-24 16:11:58,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 16:11:58,443 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 37 states. [2020-09-24 16:11:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:59,609 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-09-24 16:11:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-24 16:11:59,610 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-09-24 16:11:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:59,611 INFO L225 Difference]: With dead ends: 91 [2020-09-24 16:11:59,611 INFO L226 Difference]: Without dead ends: 86 [2020-09-24 16:11:59,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1618, Invalid=3352, Unknown=0, NotChecked=0, Total=4970 [2020-09-24 16:11:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-24 16:11:59,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-09-24 16:11:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 16:11:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-09-24 16:11:59,617 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 79 [2020-09-24 16:11:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:59,617 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-09-24 16:11:59,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-24 16:11:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-09-24 16:11:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 16:11:59,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:59,618 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:59,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 16:11:59,619 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:59,619 INFO L82 PathProgramCache]: Analyzing trace with hash 433097306, now seen corresponding path program 18 times [2020-09-24 16:11:59,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:59,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919758260] [2020-09-24 16:11:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:59,797 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:59,798 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:59,798 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:59,798 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:59,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 16:11:59,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:59,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-09-24 16:11:59,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 16:11:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:11:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 16:11:59,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:00,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:00,573 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:00,573 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:00,574 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:00,574 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:00,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:00,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:00,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:00,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:00,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:00,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:00,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:00,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:00,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919758260] [2020-09-24 16:12:00,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:00,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-24 16:12:00,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960125556] [2020-09-24 16:12:00,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-24 16:12:00,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:00,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-24 16:12:00,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 16:12:00,585 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 39 states. [2020-09-24 16:12:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:01,903 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-09-24 16:12:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-24 16:12:01,904 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-09-24 16:12:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:01,905 INFO L225 Difference]: With dead ends: 95 [2020-09-24 16:12:01,905 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 16:12:01,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1803, Invalid=3747, Unknown=0, NotChecked=0, Total=5550 [2020-09-24 16:12:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 16:12:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-09-24 16:12:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-24 16:12:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-09-24 16:12:01,911 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 83 [2020-09-24 16:12:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:01,911 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-09-24 16:12:01,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-24 16:12:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-09-24 16:12:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-24 16:12:01,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:01,913 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:01,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 16:12:01,913 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:01,913 INFO L82 PathProgramCache]: Analyzing trace with hash 28496215, now seen corresponding path program 19 times [2020-09-24 16:12:01,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:01,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075854034] [2020-09-24 16:12:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:02,142 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:02,142 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:02,143 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:02,143 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:02,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-24 16:12:02,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:02,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-09-24 16:12:02,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:02,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 16:12:02,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:12:02,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 16:12:02,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:12:02,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:02,980 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:02,980 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:02,980 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:02,980 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:02,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:02,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:02,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:02,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:02,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:02,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:02,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:02,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:02,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075854034] [2020-09-24 16:12:02,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:02,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-24 16:12:02,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261029896] [2020-09-24 16:12:02,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-24 16:12:02,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:02,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-24 16:12:02,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 16:12:02,991 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 41 states. [2020-09-24 16:12:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:04,434 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-09-24 16:12:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-24 16:12:04,435 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 87 [2020-09-24 16:12:04,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:04,436 INFO L225 Difference]: With dead ends: 99 [2020-09-24 16:12:04,436 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 16:12:04,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2020-09-24 16:12:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 16:12:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-09-24 16:12:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-24 16:12:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-09-24 16:12:04,442 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 87 [2020-09-24 16:12:04,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:04,442 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-09-24 16:12:04,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-24 16:12:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-09-24 16:12:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 16:12:04,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:04,443 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:04,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 16:12:04,444 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:04,444 INFO L82 PathProgramCache]: Analyzing trace with hash 284119508, now seen corresponding path program 20 times [2020-09-24 16:12:04,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:04,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528214535] [2020-09-24 16:12:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:04,688 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:04,688 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:04,688 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:04,689 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:04,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-24 16:12:04,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:04,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-09-24 16:12:04,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-24 16:12:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:12:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-24 16:12:04,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:05,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:05,587 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:05,587 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:05,587 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:05,587 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:05,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:05,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:05,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:05,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:05,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:05,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:05,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:05,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:05,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528214535] [2020-09-24 16:12:05,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:05,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-24 16:12:05,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553618921] [2020-09-24 16:12:05,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-24 16:12:05,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:05,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-24 16:12:05,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 16:12:05,615 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 43 states. [2020-09-24 16:12:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:07,132 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-09-24 16:12:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-24 16:12:07,133 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 91 [2020-09-24 16:12:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:07,134 INFO L225 Difference]: With dead ends: 103 [2020-09-24 16:12:07,135 INFO L226 Difference]: Without dead ends: 98 [2020-09-24 16:12:07,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2203, Invalid=4603, Unknown=0, NotChecked=0, Total=6806 [2020-09-24 16:12:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-24 16:12:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-09-24 16:12:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-24 16:12:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-09-24 16:12:07,142 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 91 [2020-09-24 16:12:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:07,142 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-09-24 16:12:07,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-24 16:12:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-09-24 16:12:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-24 16:12:07,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:07,144 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:07,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 16:12:07,144 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:07,144 INFO L82 PathProgramCache]: Analyzing trace with hash 885869521, now seen corresponding path program 21 times [2020-09-24 16:12:07,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:07,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54201660] [2020-09-24 16:12:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:07,382 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:07,383 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:07,383 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:07,383 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:07,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-24 16:12:07,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:07,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-09-24 16:12:07,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-09-24 16:12:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:12:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 16:12:07,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:08,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:08,502 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:08,502 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:08,503 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:08,503 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:08,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:08,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:08,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:08,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:08,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:08,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:08,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:08,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:08,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54201660] [2020-09-24 16:12:08,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:08,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-24 16:12:08,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196304677] [2020-09-24 16:12:08,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-24 16:12:08,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:08,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-24 16:12:08,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2020-09-24 16:12:08,526 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 45 states. [2020-09-24 16:12:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:10,113 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-09-24 16:12:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-09-24 16:12:10,116 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 95 [2020-09-24 16:12:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:10,117 INFO L225 Difference]: With dead ends: 107 [2020-09-24 16:12:10,117 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 16:12:10,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2418, Invalid=5064, Unknown=0, NotChecked=0, Total=7482 [2020-09-24 16:12:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 16:12:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-09-24 16:12:10,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 16:12:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-09-24 16:12:10,122 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 95 [2020-09-24 16:12:10,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:10,123 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-09-24 16:12:10,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-24 16:12:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-09-24 16:12:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-24 16:12:10,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:10,124 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:10,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 16:12:10,125 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:10,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:10,125 INFO L82 PathProgramCache]: Analyzing trace with hash -453771442, now seen corresponding path program 22 times [2020-09-24 16:12:10,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:10,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248585017] [2020-09-24 16:12:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:10,382 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:10,383 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:10,383 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:10,383 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:10,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-24 16:12:10,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:10,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-09-24 16:12:10,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:10,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-09-24 16:12:10,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:12:10,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-24 16:12:10,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:11,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:11,628 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:11,628 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:11,628 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:11,629 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:11,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:11,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:11,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:11,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:11,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:11,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:11,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:11,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:12:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:11,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248585017] [2020-09-24 16:12:11,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:11,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-09-24 16:12:11,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913779333] [2020-09-24 16:12:11,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-24 16:12:11,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:11,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-24 16:12:11,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 16:12:11,662 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 47 states. [2020-09-24 16:12:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:13,430 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-09-24 16:12:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-09-24 16:12:13,431 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 99 [2020-09-24 16:12:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:13,432 INFO L225 Difference]: With dead ends: 111 [2020-09-24 16:12:13,432 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 16:12:13,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2020-09-24 16:12:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 16:12:13,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-09-24 16:12:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 16:12:13,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-09-24 16:12:13,439 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 99 [2020-09-24 16:12:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:13,439 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-09-24 16:12:13,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-24 16:12:13,440 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-09-24 16:12:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 16:12:13,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:13,441 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:13,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 16:12:13,442 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:13,442 INFO L82 PathProgramCache]: Analyzing trace with hash -211112885, now seen corresponding path program 23 times [2020-09-24 16:12:13,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:13,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938477287] [2020-09-24 16:12:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:13,745 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:13,746 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:13,746 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:13,746 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:13,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-24 16:12:13,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:13,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-09-24 16:12:13,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:13,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-09-24 16:12:13,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:12:13,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-24 16:12:13,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:14,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:14,804 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:14,804 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:14,804 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:14,805 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:14,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:14,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:14,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:14,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:14,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:14,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:14,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:14,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:14,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938477287] [2020-09-24 16:12:14,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:14,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-09-24 16:12:14,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764898624] [2020-09-24 16:12:14,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-24 16:12:14,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:14,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-24 16:12:14,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2020-09-24 16:12:14,824 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 49 states. [2020-09-24 16:12:16,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:16,775 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-09-24 16:12:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-09-24 16:12:16,776 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 103 [2020-09-24 16:12:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:16,777 INFO L225 Difference]: With dead ends: 115 [2020-09-24 16:12:16,777 INFO L226 Difference]: Without dead ends: 110 [2020-09-24 16:12:16,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2020-09-24 16:12:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-24 16:12:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-09-24 16:12:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-24 16:12:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-09-24 16:12:16,784 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 103 [2020-09-24 16:12:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:16,784 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-09-24 16:12:16,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-24 16:12:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-09-24 16:12:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-24 16:12:16,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:16,785 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:16,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 16:12:16,786 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:16,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:16,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1553502920, now seen corresponding path program 24 times [2020-09-24 16:12:16,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:16,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036820054] [2020-09-24 16:12:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:17,097 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:17,098 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:17,098 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:17,098 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:17,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-09-24 16:12:17,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:17,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-09-24 16:12:17,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:17,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-09-24 16:12:17,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:12:17,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-09-24 16:12:17,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:18,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:18,481 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:18,482 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:18,482 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:18,482 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:18,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:18,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:18,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:18,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:18,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:18,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:18,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:18,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:18,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036820054] [2020-09-24 16:12:18,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:18,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-09-24 16:12:18,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336031766] [2020-09-24 16:12:18,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-09-24 16:12:18,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-09-24 16:12:18,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 16:12:18,498 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 51 states. [2020-09-24 16:12:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:20,731 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2020-09-24 16:12:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-09-24 16:12:20,734 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 107 [2020-09-24 16:12:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:20,735 INFO L225 Difference]: With dead ends: 119 [2020-09-24 16:12:20,735 INFO L226 Difference]: Without dead ends: 114 [2020-09-24 16:12:20,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3123, Invalid=6579, Unknown=0, NotChecked=0, Total=9702 [2020-09-24 16:12:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-24 16:12:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-09-24 16:12:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-24 16:12:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-09-24 16:12:20,740 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 107 [2020-09-24 16:12:20,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:20,740 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-09-24 16:12:20,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-09-24 16:12:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-09-24 16:12:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-24 16:12:20,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:20,742 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:20,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 16:12:20,742 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:20,742 INFO L82 PathProgramCache]: Analyzing trace with hash 390394565, now seen corresponding path program 25 times [2020-09-24 16:12:20,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:20,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642647259] [2020-09-24 16:12:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:21,100 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:21,101 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:21,101 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:21,101 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:21,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-09-24 16:12:21,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:21,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-09-24 16:12:21,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:21,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-09-24 16:12:21,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:12:21,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-24 16:12:21,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:22,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:22,579 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:22,580 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:22,580 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:22,580 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:22,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:22,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:22,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:22,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:22,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:22,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642647259] [2020-09-24 16:12:22,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:22,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-09-24 16:12:22,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992738007] [2020-09-24 16:12:22,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-24 16:12:22,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-24 16:12:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2020-09-24 16:12:22,594 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 53 states. [2020-09-24 16:12:24,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:24,931 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2020-09-24 16:12:24,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-09-24 16:12:24,931 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 111 [2020-09-24 16:12:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:24,932 INFO L225 Difference]: With dead ends: 123 [2020-09-24 16:12:24,933 INFO L226 Difference]: Without dead ends: 118 [2020-09-24 16:12:24,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2020-09-24 16:12:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-24 16:12:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-09-24 16:12:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-24 16:12:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-09-24 16:12:24,937 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 111 [2020-09-24 16:12:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:24,938 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-09-24 16:12:24,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-24 16:12:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-09-24 16:12:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 16:12:24,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:24,939 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:24,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 16:12:24,939 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:24,940 INFO L82 PathProgramCache]: Analyzing trace with hash -459862974, now seen corresponding path program 26 times [2020-09-24 16:12:24,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:24,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541183655] [2020-09-24 16:12:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:25,287 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:25,288 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:25,289 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:25,289 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:25,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-09-24 16:12:25,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:25,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-09-24 16:12:25,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:25,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-09-24 16:12:25,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:12:25,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-09-24 16:12:25,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:26,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:26,908 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:26,908 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:26,908 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:26,909 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:26,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:26,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:26,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:26,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:26,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:26,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:26,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:26,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:26,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541183655] [2020-09-24 16:12:26,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:26,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-09-24 16:12:26,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507190332] [2020-09-24 16:12:26,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-09-24 16:12:26,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:26,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-09-24 16:12:26,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2020-09-24 16:12:26,923 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 55 states. [2020-09-24 16:12:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:29,402 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2020-09-24 16:12:29,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-09-24 16:12:29,403 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 115 [2020-09-24 16:12:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:29,404 INFO L225 Difference]: With dead ends: 127 [2020-09-24 16:12:29,404 INFO L226 Difference]: Without dead ends: 122 [2020-09-24 16:12:29,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3643, Invalid=7699, Unknown=0, NotChecked=0, Total=11342 [2020-09-24 16:12:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-24 16:12:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-09-24 16:12:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-24 16:12:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2020-09-24 16:12:29,410 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 115 [2020-09-24 16:12:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:29,410 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2020-09-24 16:12:29,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-09-24 16:12:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2020-09-24 16:12:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-24 16:12:29,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:29,411 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:29,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-24 16:12:29,412 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:29,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:29,412 INFO L82 PathProgramCache]: Analyzing trace with hash 538320703, now seen corresponding path program 27 times [2020-09-24 16:12:29,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:29,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045134057] [2020-09-24 16:12:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:29,792 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:29,793 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:29,793 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:29,793 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:29,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-24 16:12:29,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:29,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-09-24 16:12:29,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-09-24 16:12:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:12:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-09-24 16:12:29,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:31,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:31,532 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:31,532 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:31,532 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:31,532 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:31,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:31,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:31,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:31,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:31,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:31,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:31,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:31,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045134057] [2020-09-24 16:12:31,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:31,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-09-24 16:12:31,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885179403] [2020-09-24 16:12:31,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-09-24 16:12:31,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:31,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-09-24 16:12:31,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2020-09-24 16:12:31,551 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 57 states. [2020-09-24 16:12:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:34,307 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-09-24 16:12:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-09-24 16:12:34,308 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 119 [2020-09-24 16:12:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:34,309 INFO L225 Difference]: With dead ends: 131 [2020-09-24 16:12:34,309 INFO L226 Difference]: Without dead ends: 126 [2020-09-24 16:12:34,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3918, Invalid=8292, Unknown=0, NotChecked=0, Total=12210 [2020-09-24 16:12:34,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-24 16:12:34,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-09-24 16:12:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-24 16:12:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2020-09-24 16:12:34,315 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 119 [2020-09-24 16:12:34,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:34,315 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2020-09-24 16:12:34,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-09-24 16:12:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2020-09-24 16:12:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-24 16:12:34,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:34,316 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:34,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-24 16:12:34,317 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:34,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1884722244, now seen corresponding path program 28 times [2020-09-24 16:12:34,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:34,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088745868] [2020-09-24 16:12:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:34,714 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:34,714 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:34,715 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:34,715 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:34,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-09-24 16:12:34,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:34,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-09-24 16:12:34,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:34,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-09-24 16:12:34,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:12:34,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-24 16:12:34,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:12:36,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:36,507 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:36,508 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:36,508 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:36,508 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:36,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:36,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:36,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:36,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:36,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:36,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088745868] [2020-09-24 16:12:36,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:36,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-09-24 16:12:36,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319280887] [2020-09-24 16:12:36,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-09-24 16:12:36,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:36,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-09-24 16:12:36,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 16:12:36,522 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 59 states. [2020-09-24 16:12:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:39,486 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-09-24 16:12:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-09-24 16:12:39,487 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 123 [2020-09-24 16:12:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:39,487 INFO L225 Difference]: With dead ends: 135 [2020-09-24 16:12:39,488 INFO L226 Difference]: Without dead ends: 130 [2020-09-24 16:12:39,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2020-09-24 16:12:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-24 16:12:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-09-24 16:12:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-24 16:12:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-09-24 16:12:39,496 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 123 [2020-09-24 16:12:39,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:39,497 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-09-24 16:12:39,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-09-24 16:12:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-09-24 16:12:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-24 16:12:39,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:39,498 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:39,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-24 16:12:39,499 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:39,500 INFO L82 PathProgramCache]: Analyzing trace with hash 865612217, now seen corresponding path program 29 times [2020-09-24 16:12:39,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:39,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476434139] [2020-09-24 16:12:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat