/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:06:46,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:06:46,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:06:46,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:06:46,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:06:46,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:06:46,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:06:46,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:06:46,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:06:46,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:06:46,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:06:46,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:06:46,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:06:46,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:06:46,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:06:46,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:06:46,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:06:46,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:06:46,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:06:46,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:06:46,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:06:46,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:06:46,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:06:46,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:06:46,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:06:46,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:06:46,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:06:46,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:06:46,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:06:46,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:06:46,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:06:46,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:06:46,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:06:46,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:06:46,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:06:46,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:06:46,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:06:46,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:06:46,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:06:46,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:06:46,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:06:46,444 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 [2020-10-12 16:06:46,487 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:06:46,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:06:46,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:06:46,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:06:46,491 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:06:46,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:06:46,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:06:46,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:06:46,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:06:46,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:06:46,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:06:46,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:06:46,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:06:46,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:06:46,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:06:46,495 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:06:46,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:06:46,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:06:46,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:06:46,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:06:46,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:06:46,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:06:46,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:06:46,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:06:46,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:06:46,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:06:46,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:06:46,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:06:46,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:06:46,497 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:06:46,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:06:46,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:06:46,861 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:06:46,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:06:46,864 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:06:46,864 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-12 16:06:46,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2fbeb84d/0e700f90851941a4810e5ddf04431803/FLAG0576de02a [2020-10-12 16:06:47,436 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:06:47,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-12 16:06:47,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2fbeb84d/0e700f90851941a4810e5ddf04431803/FLAG0576de02a [2020-10-12 16:06:47,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2fbeb84d/0e700f90851941a4810e5ddf04431803 [2020-10-12 16:06:47,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:06:47,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:06:47,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:06:47,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:06:47,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:06:47,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:06:47" (1/1) ... [2020-10-12 16:06:47,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ccf1036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:47, skipping insertion in model container [2020-10-12 16:06:47,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:06:47" (1/1) ... [2020-10-12 16:06:47,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:06:47,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:06:48,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:06:48,102 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:06:48,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:06:48,139 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:06:48,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:48 WrapperNode [2020-10-12 16:06:48,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:06:48,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:06:48,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:06:48,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:06:48,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:48" (1/1) ... [2020-10-12 16:06:48,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:48" (1/1) ... [2020-10-12 16:06:48,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:48" (1/1) ... [2020-10-12 16:06:48,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:48" (1/1) ... [2020-10-12 16:06:48,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:48" (1/1) ... [2020-10-12 16:06:48,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:48" (1/1) ... [2020-10-12 16:06:48,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:48" (1/1) ... [2020-10-12 16:06:48,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:06:48,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:06:48,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:06:48,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:06:48,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:48" (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 [2020-10-12 16:06:48,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:06:48,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:06:48,356 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:06:48,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:06:48,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:06:48,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:06:48,357 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:06:48,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:06:48,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:06:48,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:06:48,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:06:48,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:06:48,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:06:48,619 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:06:48,619 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:06:48,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:06:48 BoogieIcfgContainer [2020-10-12 16:06:48,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:06:48,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:06:48,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:06:48,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:06:48,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:06:47" (1/3) ... [2020-10-12 16:06:48,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9e068b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:06:48, skipping insertion in model container [2020-10-12 16:06:48,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:48" (2/3) ... [2020-10-12 16:06:48,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9e068b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:06:48, skipping insertion in model container [2020-10-12 16:06:48,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:06:48" (3/3) ... [2020-10-12 16:06:48,658 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-10-12 16:06:48,683 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:06:48,695 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:06:48,709 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:06:48,731 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:06:48,731 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:06:48,731 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:06:48,731 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:06:48,732 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:06:48,732 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:06:48,732 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:06:48,732 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:06:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-12 16:06:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:06:48,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:48,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:48,756 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1915647303, now seen corresponding path program 1 times [2020-10-12 16:06:48,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:48,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128745123] [2020-10-12 16:06:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:48,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:48,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:48,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:06:48,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:48,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-12 16:06:48,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:06:48,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:48,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:06:48,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:06:49,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:49,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:49,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:49,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:49,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:49,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:06:49,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:49,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:49,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:49,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:49,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:49,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128745123] [2020-10-12 16:06:49,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:06:49,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:06:49,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016842557] [2020-10-12 16:06:49,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:06:49,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:49,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:06:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:06:49,102 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-12 16:06:49,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:49,184 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-10-12 16:06:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:06:49,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-12 16:06:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:49,196 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:06:49,196 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:06:49,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:06:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:06:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-12 16:06:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-12 16:06:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-12 16:06:49,241 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-10-12 16:06:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:49,241 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-12 16:06:49,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:06:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-12 16:06:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:06:49,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:49,243 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:49,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:06:49,244 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:49,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:49,244 INFO L82 PathProgramCache]: Analyzing trace with hash 249504553, now seen corresponding path program 1 times [2020-10-12 16:06:49,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:49,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915153154] [2020-10-12 16:06:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:49,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:49,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:49,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:06:49,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:49,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-12 16:06:49,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:06:49,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:49,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:06:49,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:49,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:49,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:49,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:49,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:49,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:49,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:06:49,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:49,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:49,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:49,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915153154] [2020-10-12 16:06:49,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:49,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:06:49,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860024962] [2020-10-12 16:06:49,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:06:49,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:49,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:06:49,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:06:49,521 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-10-12 16:06:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:49,578 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-12 16:06:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:06:49,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-12 16:06:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:49,580 INFO L225 Difference]: With dead ends: 24 [2020-10-12 16:06:49,580 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 16:06:49,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:06:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 16:06:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-12 16:06:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:06:49,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-12 16:06:49,587 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2020-10-12 16:06:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:49,588 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-12 16:06:49,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:06:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-12 16:06:49,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:06:49,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:49,589 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:49,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:06:49,590 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:49,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:49,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2070634734, now seen corresponding path program 2 times [2020-10-12 16:06:49,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:49,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213119965] [2020-10-12 16:06:49,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:49,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:49,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:49,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:06:49,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:49,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 16:06:49,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:06:49,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:49,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:06:49,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:49,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:49,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:49,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:49,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:49,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:49,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:06:49,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:49,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:49,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:49,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:49,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:49,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213119965] [2020-10-12 16:06:49,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:49,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:06:49,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338747716] [2020-10-12 16:06:49,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:06:49,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:49,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:06:49,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:06:49,810 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-10-12 16:06:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:49,929 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-12 16:06:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:06:49,932 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-12 16:06:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:49,933 INFO L225 Difference]: With dead ends: 27 [2020-10-12 16:06:49,933 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:06:49,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:06:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:06:49,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 16:06:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 16:06:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-12 16:06:49,943 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 18 [2020-10-12 16:06:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:49,946 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-12 16:06:49,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:06:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-12 16:06:49,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:06:49,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:49,948 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:49,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:06:49,949 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:49,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:49,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1863528073, now seen corresponding path program 3 times [2020-10-12 16:06:49,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:49,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155021615] [2020-10-12 16:06:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:50,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:50,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:50,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:06:50,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:50,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-12 16:06:50,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:50,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:06:50,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:50,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:06:50,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:50,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:50,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:50,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:50,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:50,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:50,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:06:50,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:50,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:50,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:50,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:50,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:50,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155021615] [2020-10-12 16:06:50,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:50,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:06:50,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398224999] [2020-10-12 16:06:50,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:06:50,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:06:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:06:50,256 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-10-12 16:06:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:50,343 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-12 16:06:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:06:50,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-12 16:06:50,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:50,344 INFO L225 Difference]: With dead ends: 30 [2020-10-12 16:06:50,344 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:06:50,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:06:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:06:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:06:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:06:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-10-12 16:06:50,352 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 21 [2020-10-12 16:06:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:50,352 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-10-12 16:06:50,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:06:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-10-12 16:06:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:06:50,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:50,353 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:50,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:06:50,354 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:50,355 INFO L82 PathProgramCache]: Analyzing trace with hash -854829134, now seen corresponding path program 4 times [2020-10-12 16:06:50,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:50,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43417600] [2020-10-12 16:06:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:50,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:50,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:50,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:06:50,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:50,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-12 16:06:50,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:50,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:06:50,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:50,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:06:50,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:50,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:50,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:50,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:50,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:50,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:50,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:50,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:50,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:50,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:50,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:50,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43417600] [2020-10-12 16:06:50,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:50,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:06:50,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599453122] [2020-10-12 16:06:50,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:06:50,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:50,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:06:50,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:06:50,565 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2020-10-12 16:06:50,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:50,648 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-12 16:06:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:06:50,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-12 16:06:50,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:50,650 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:06:50,650 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:06:50,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:06:50,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:06:50,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 16:06:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:06:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-12 16:06:50,658 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2020-10-12 16:06:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:50,658 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-12 16:06:50,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:06:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-12 16:06:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:06:50,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:50,659 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:50,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:06:50,660 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:50,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1826016791, now seen corresponding path program 5 times [2020-10-12 16:06:50,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:50,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673310609] [2020-10-12 16:06:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:50,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:50,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:50,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:06:50,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:50,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-12 16:06:50,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:50,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:06:50,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:50,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:06:50,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:50,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:50,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:50,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:50,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:50,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:50,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:50,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:50,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:50,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673310609] [2020-10-12 16:06:50,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:50,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:06:50,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501820460] [2020-10-12 16:06:50,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:06:50,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:50,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:06:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:06:50,934 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 10 states. [2020-10-12 16:06:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:51,039 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-12 16:06:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:06:51,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-12 16:06:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:51,041 INFO L225 Difference]: With dead ends: 36 [2020-10-12 16:06:51,041 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 16:06:51,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:06:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 16:06:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 16:06:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 16:06:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-12 16:06:51,048 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 27 [2020-10-12 16:06:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:51,049 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-12 16:06:51,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:06:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-12 16:06:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:06:51,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:51,050 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:51,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:06:51,051 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:51,051 INFO L82 PathProgramCache]: Analyzing trace with hash 717166674, now seen corresponding path program 6 times [2020-10-12 16:06:51,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:51,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965785746] [2020-10-12 16:06:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:51,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:51,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:51,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:06:51,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:51,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-12 16:06:51,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:51,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:06:51,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:51,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:06:51,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:51,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:51,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:51,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:51,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:51,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:51,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:51,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:51,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:51,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:51,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:51,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:51,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965785746] [2020-10-12 16:06:51,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:51,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:06:51,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015253547] [2020-10-12 16:06:51,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:06:51,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:51,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:06:51,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:06:51,323 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 11 states. [2020-10-12 16:06:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:51,440 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-12 16:06:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:06:51,440 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 16:06:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:51,442 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:06:51,442 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:06:51,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:06:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:06:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-12 16:06:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 16:06:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-12 16:06:51,449 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2020-10-12 16:06:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:51,449 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-12 16:06:51,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:06:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-12 16:06:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:06:51,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:51,451 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:51,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:06:51,451 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:51,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:51,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1472671049, now seen corresponding path program 7 times [2020-10-12 16:06:51,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:51,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426153543] [2020-10-12 16:06:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:51,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:51,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:51,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:06:51,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:51,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-12 16:06:51,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:06:51,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:51,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:06:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:51,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:51,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:51,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:51,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:51,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:51,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:51,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:51,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426153543] [2020-10-12 16:06:51,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:51,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:06:51,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472896361] [2020-10-12 16:06:51,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:06:51,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:51,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:06:51,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:06:51,782 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 12 states. [2020-10-12 16:06:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:51,981 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-12 16:06:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:06:51,982 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-12 16:06:51,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:51,983 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:06:51,983 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:06:51,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:06:51,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:06:51,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 16:06:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:06:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-10-12 16:06:51,990 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 33 [2020-10-12 16:06:51,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:51,991 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-10-12 16:06:51,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:06:51,991 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-10-12 16:06:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:06:51,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:51,992 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:51,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:06:51,993 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1220091662, now seen corresponding path program 8 times [2020-10-12 16:06:51,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:51,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858550419] [2020-10-12 16:06:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:52,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:52,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:52,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:06:52,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:52,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-12 16:06:52,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:06:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:52,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:06:52,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:52,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:52,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:52,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:52,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:52,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:52,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:52,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:52,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:52,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:52,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:52,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:52,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858550419] [2020-10-12 16:06:52,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:52,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:06:52,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436500951] [2020-10-12 16:06:52,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:06:52,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:52,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:06:52,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:06:52,354 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 13 states. [2020-10-12 16:06:52,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:52,521 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-10-12 16:06:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:06:52,521 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-12 16:06:52,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:52,523 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:06:52,523 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:06:52,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:06:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:06:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 16:06:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:06:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-10-12 16:06:52,530 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 36 [2020-10-12 16:06:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:52,530 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-10-12 16:06:52,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:06:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-10-12 16:06:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:06:52,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:52,532 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:52,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:06:52,532 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:52,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:52,532 INFO L82 PathProgramCache]: Analyzing trace with hash 85139625, now seen corresponding path program 9 times [2020-10-12 16:06:52,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:52,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696433267] [2020-10-12 16:06:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:52,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:52,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:52,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:06:52,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:52,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-12 16:06:52,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:52,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:06:52,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:52,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:06:52,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:53,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:53,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:53,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:53,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:53,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:53,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:53,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:53,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:53,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696433267] [2020-10-12 16:06:53,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:53,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:06:53,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640020607] [2020-10-12 16:06:53,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:06:53,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:53,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:06:53,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:06:53,037 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 14 states. [2020-10-12 16:06:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:53,230 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-10-12 16:06:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:06:53,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-12 16:06:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:53,232 INFO L225 Difference]: With dead ends: 48 [2020-10-12 16:06:53,232 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 16:06:53,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:06:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 16:06:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 16:06:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:06:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-12 16:06:53,239 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 39 [2020-10-12 16:06:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:53,239 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-12 16:06:53,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:06:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-12 16:06:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:06:53,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:53,241 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:53,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:06:53,241 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:53,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1891479954, now seen corresponding path program 10 times [2020-10-12 16:06:53,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:53,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380162803] [2020-10-12 16:06:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:53,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:53,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:53,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:06:53,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:53,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-12 16:06:53,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:53,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:06:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:06:53,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:53,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:53,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:53,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:53,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:53,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:53,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:53,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:53,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:53,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:53,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:53,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:53,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380162803] [2020-10-12 16:06:53,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:53,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:06:53,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806921940] [2020-10-12 16:06:53,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:06:53,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:53,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:06:53,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:06:53,775 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 15 states. [2020-10-12 16:06:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:53,982 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-12 16:06:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:06:53,982 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-12 16:06:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:53,983 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:06:53,983 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 16:06:53,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:06:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 16:06:53,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 16:06:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:06:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-10-12 16:06:53,990 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 42 [2020-10-12 16:06:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:53,991 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-10-12 16:06:53,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:06:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-10-12 16:06:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:06:53,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:53,992 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:53,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:06:53,992 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1363997687, now seen corresponding path program 11 times [2020-10-12 16:06:53,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:53,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218902163] [2020-10-12 16:06:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:54,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:54,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:54,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 16:06:54,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:54,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-12 16:06:54,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:54,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:06:54,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:54,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 16:06:54,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:54,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:54,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:54,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:54,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:54,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:54,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:54,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:54,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:54,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:54,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:54,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218902163] [2020-10-12 16:06:54,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:54,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:06:54,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703518206] [2020-10-12 16:06:54,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:06:54,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:06:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:06:54,641 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 16 states. [2020-10-12 16:06:54,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:54,886 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-12 16:06:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:06:54,886 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-12 16:06:54,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:54,887 INFO L225 Difference]: With dead ends: 54 [2020-10-12 16:06:54,887 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:06:54,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:06:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:06:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-12 16:06:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 16:06:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-10-12 16:06:54,895 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 45 [2020-10-12 16:06:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:54,895 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-10-12 16:06:54,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:06:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-10-12 16:06:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:06:54,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:54,896 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:54,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:06:54,897 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash -641889742, now seen corresponding path program 12 times [2020-10-12 16:06:54,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:54,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811078460] [2020-10-12 16:06:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:54,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:55,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:55,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:06:55,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:55,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-12 16:06:55,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:06:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:06:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:55,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:55,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:55,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:55,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:55,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:55,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:55,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:55,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:55,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:55,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:55,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:55,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811078460] [2020-10-12 16:06:55,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:55,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:06:55,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565900848] [2020-10-12 16:06:55,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:06:55,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:55,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:06:55,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:06:55,597 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 17 states. [2020-10-12 16:06:55,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:55,881 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-12 16:06:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:06:55,881 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-12 16:06:55,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:55,882 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:06:55,883 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:06:55,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:06:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:06:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-12 16:06:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 16:06:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-10-12 16:06:55,890 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 48 [2020-10-12 16:06:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:55,890 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-10-12 16:06:55,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:06:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-10-12 16:06:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:06:55,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:55,891 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:55,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:06:55,892 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:55,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1815285911, now seen corresponding path program 13 times [2020-10-12 16:06:55,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:55,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728024477] [2020-10-12 16:06:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:55,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:56,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:56,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:06:56,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:56,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-12 16:06:56,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:06:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:06:56,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:56,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:56,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:56,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:56,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:56,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:56,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:56,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:56,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:56,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:56,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:56,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:56,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728024477] [2020-10-12 16:06:56,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:56,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:06:56,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373992525] [2020-10-12 16:06:56,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:06:56,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:56,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:06:56,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:06:56,569 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 18 states. [2020-10-12 16:06:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:56,913 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2020-10-12 16:06:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:06:56,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-12 16:06:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:56,915 INFO L225 Difference]: With dead ends: 60 [2020-10-12 16:06:56,915 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 16:06:56,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:06:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 16:06:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-12 16:06:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:06:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-10-12 16:06:56,923 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51 [2020-10-12 16:06:56,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:56,926 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-10-12 16:06:56,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:06:56,926 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-10-12 16:06:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:06:56,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:56,928 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:56,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:06:56,929 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:56,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1721734446, now seen corresponding path program 14 times [2020-10-12 16:06:56,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:56,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262468478] [2020-10-12 16:06:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:56,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:57,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:57,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 16:06:57,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:57,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-12 16:06:57,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:57,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:06:57,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:57,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:06:57,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:57,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:57,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:57,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:57,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:57,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:57,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:06:57,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:57,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:57,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262468478] [2020-10-12 16:06:57,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:57,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:06:57,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299422151] [2020-10-12 16:06:57,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:06:57,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:57,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:06:57,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:06:57,740 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 19 states. [2020-10-12 16:06:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:58,116 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-10-12 16:06:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:06:58,117 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-12 16:06:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:58,118 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:06:58,118 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:06:58,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:06:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:06:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 16:06:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:06:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-10-12 16:06:58,130 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 54 [2020-10-12 16:06:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:58,131 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-10-12 16:06:58,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:06:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-10-12 16:06:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 16:06:58,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:58,133 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:58,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:06:58,136 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:58,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2131151561, now seen corresponding path program 15 times [2020-10-12 16:06:58,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:58,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307263608] [2020-10-12 16:06:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:58,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:58,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:58,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 16:06:58,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:58,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-12 16:06:58,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:58,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:06:58,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:58,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 16:06:58,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:58,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:58,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:58,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:58,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:58,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:58,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:58,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:58,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:58,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:58,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:58,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:58,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307263608] [2020-10-12 16:06:58,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:58,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:06:58,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176830536] [2020-10-12 16:06:58,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:06:58,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:58,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:06:58,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:06:58,944 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 20 states. [2020-10-12 16:06:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:59,340 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-10-12 16:06:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:06:59,341 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-12 16:06:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:59,342 INFO L225 Difference]: With dead ends: 66 [2020-10-12 16:06:59,342 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 16:06:59,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:06:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 16:06:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-12 16:06:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:06:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2020-10-12 16:06:59,349 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 57 [2020-10-12 16:06:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:59,349 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2020-10-12 16:06:59,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:06:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2020-10-12 16:06:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:06:59,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:59,350 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:59,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:06:59,351 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:59,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:59,351 INFO L82 PathProgramCache]: Analyzing trace with hash 457200498, now seen corresponding path program 16 times [2020-10-12 16:06:59,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:59,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050523267] [2020-10-12 16:06:59,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:59,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:59,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:59,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:06:59,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:59,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-10-12 16:06:59,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:59,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:06:59,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:06:59,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 16:06:59,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:00,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:00,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:00,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:00,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:00,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:00,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:00,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:00,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:00,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:00,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:00,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050523267] [2020-10-12 16:07:00,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:00,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:07:00,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137127910] [2020-10-12 16:07:00,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:07:00,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:00,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:07:00,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:07:00,160 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 21 states. [2020-10-12 16:07:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:00,656 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2020-10-12 16:07:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:07:00,657 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2020-10-12 16:07:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:00,658 INFO L225 Difference]: With dead ends: 69 [2020-10-12 16:07:00,658 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 16:07:00,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:07:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 16:07:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-12 16:07:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 16:07:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2020-10-12 16:07:00,673 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 60 [2020-10-12 16:07:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:00,673 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2020-10-12 16:07:00,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:07:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2020-10-12 16:07:00,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 16:07:00,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:00,677 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:00,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:07:00,678 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:00,678 INFO L82 PathProgramCache]: Analyzing trace with hash 646356521, now seen corresponding path program 17 times [2020-10-12 16:07:00,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:00,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894313460] [2020-10-12 16:07:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:00,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:01,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:01,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 16:07:01,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:01,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 549 [2020-10-12 16:07:01,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:01,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:07:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 16:07:01,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:01,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:01,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:01,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:01,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:01,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:01,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:01,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:01,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:01,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:01,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:01,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:01,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894313460] [2020-10-12 16:07:01,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:01,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:07:01,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033926000] [2020-10-12 16:07:01,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:07:01,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:01,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:07:01,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:07:01,706 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand 22 states. [2020-10-12 16:07:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:02,263 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-10-12 16:07:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:07:02,264 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-12 16:07:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:02,265 INFO L225 Difference]: With dead ends: 72 [2020-10-12 16:07:02,265 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 16:07:02,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:07:02,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 16:07:02,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-12 16:07:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 16:07:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2020-10-12 16:07:02,272 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 63 [2020-10-12 16:07:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:02,272 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2020-10-12 16:07:02,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:07:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2020-10-12 16:07:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:07:02,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:02,273 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:02,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:07:02,274 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:02,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:02,274 INFO L82 PathProgramCache]: Analyzing trace with hash 796345362, now seen corresponding path program 18 times [2020-10-12 16:07:02,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:02,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005245288] [2020-10-12 16:07:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:02,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:02,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:02,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 16:07:02,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:02,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-12 16:07:02,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:02,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:07:02,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 16:07:02,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:03,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:03,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:03,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:03,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:03,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:03,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:03,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:03,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:03,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005245288] [2020-10-12 16:07:03,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:03,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:07:03,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188907477] [2020-10-12 16:07:03,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:07:03,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:03,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:07:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:07:03,184 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 23 states. [2020-10-12 16:07:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:03,705 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-10-12 16:07:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:07:03,706 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-10-12 16:07:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:03,707 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:07:03,707 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 16:07:03,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:07:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 16:07:03,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 16:07:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 16:07:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-10-12 16:07:03,724 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 66 [2020-10-12 16:07:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:03,724 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-10-12 16:07:03,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:07:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-10-12 16:07:03,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 16:07:03,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:03,725 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:03,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:07:03,726 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1947047543, now seen corresponding path program 19 times [2020-10-12 16:07:03,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:03,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887340283] [2020-10-12 16:07:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:03,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:04,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:04,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 16:07:04,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:04,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-12 16:07:04,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:04,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:07:04,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:04,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 16:07:04,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:04,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:04,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:04,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:04,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:04,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:04,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:04,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:04,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:04,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887340283] [2020-10-12 16:07:04,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:04,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:07:04,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396940360] [2020-10-12 16:07:04,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:07:04,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:04,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:07:04,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:07:04,844 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 24 states. [2020-10-12 16:07:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:05,445 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-10-12 16:07:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:07:05,446 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-12 16:07:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:05,446 INFO L225 Difference]: With dead ends: 78 [2020-10-12 16:07:05,447 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 16:07:05,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:07:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 16:07:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-12 16:07:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:07:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-10-12 16:07:05,454 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 69 [2020-10-12 16:07:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:05,454 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-10-12 16:07:05,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:07:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-10-12 16:07:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:07:05,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:05,455 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:05,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:07:05,456 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:05,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1432404814, now seen corresponding path program 20 times [2020-10-12 16:07:05,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:05,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198005361] [2020-10-12 16:07:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:05,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:06,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:06,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 16:07:06,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:06,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-12 16:07:06,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:06,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:07:06,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:06,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 16:07:06,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:06,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:06,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:06,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:06,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:06,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:06,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:06,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:06,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:06,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198005361] [2020-10-12 16:07:06,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:06,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:07:06,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105792526] [2020-10-12 16:07:06,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:07:06,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:06,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:07:06,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:07:06,496 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 25 states. [2020-10-12 16:07:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:07,163 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-10-12 16:07:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:07:07,166 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-10-12 16:07:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:07,167 INFO L225 Difference]: With dead ends: 81 [2020-10-12 16:07:07,168 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 16:07:07,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:07:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 16:07:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-12 16:07:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 16:07:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-10-12 16:07:07,179 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 72 [2020-10-12 16:07:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:07,180 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-10-12 16:07:07,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:07:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-10-12 16:07:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 16:07:07,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:07,181 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:07,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:07:07,181 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:07,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:07,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1550855401, now seen corresponding path program 21 times [2020-10-12 16:07:07,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:07,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035819492] [2020-10-12 16:07:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:07,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:07,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:07,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 16:07:07,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:07,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-12 16:07:07,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:07,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:07:07,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:07,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 16:07:07,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:08,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:08,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:08,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:08,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:08,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:08,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:08,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:08,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:08,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:08,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:08,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:08,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035819492] [2020-10-12 16:07:08,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:08,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:07:08,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420077742] [2020-10-12 16:07:08,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:07:08,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:08,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:07:08,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:07:08,312 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 26 states. [2020-10-12 16:07:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:09,059 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-10-12 16:07:09,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:07:09,062 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-10-12 16:07:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:09,063 INFO L225 Difference]: With dead ends: 84 [2020-10-12 16:07:09,063 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 16:07:09,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:07:09,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 16:07:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-12 16:07:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 16:07:09,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2020-10-12 16:07:09,070 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 75 [2020-10-12 16:07:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:09,071 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2020-10-12 16:07:09,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:07:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2020-10-12 16:07:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 16:07:09,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:09,072 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:09,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:07:09,072 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:09,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:09,072 INFO L82 PathProgramCache]: Analyzing trace with hash 97664338, now seen corresponding path program 22 times [2020-10-12 16:07:09,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:09,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846407127] [2020-10-12 16:07:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:09,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:09,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:09,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 16:07:09,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:09,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 796 [2020-10-12 16:07:09,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:09,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:07:09,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:09,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 16:07:09,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:10,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:10,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:10,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:10,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:10,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:10,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:10,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846407127] [2020-10-12 16:07:10,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:10,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:07:10,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834679374] [2020-10-12 16:07:10,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:07:10,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:07:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:07:10,375 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 27 states. [2020-10-12 16:07:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:11,207 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2020-10-12 16:07:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:07:11,208 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2020-10-12 16:07:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:11,209 INFO L225 Difference]: With dead ends: 87 [2020-10-12 16:07:11,209 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 16:07:11,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:07:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 16:07:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-12 16:07:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 16:07:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-10-12 16:07:11,221 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 78 [2020-10-12 16:07:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:11,221 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-10-12 16:07:11,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:07:11,221 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-10-12 16:07:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 16:07:11,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:11,222 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:11,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:07:11,223 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1353050185, now seen corresponding path program 23 times [2020-10-12 16:07:11,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:11,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610257887] [2020-10-12 16:07:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:11,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:11,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:11,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 16:07:11,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:11,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-12 16:07:11,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:07:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:11,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 16:07:11,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:12,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:12,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:12,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:12,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:12,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:12,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:12,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:12,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:12,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:12,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610257887] [2020-10-12 16:07:12,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:12,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:07:12,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961593810] [2020-10-12 16:07:12,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:07:12,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:12,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:07:12,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:07:12,661 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 28 states. [2020-10-12 16:07:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:13,589 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-10-12 16:07:13,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:07:13,590 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-10-12 16:07:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:13,591 INFO L225 Difference]: With dead ends: 90 [2020-10-12 16:07:13,591 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 16:07:13,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:07:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 16:07:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-12 16:07:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 16:07:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2020-10-12 16:07:13,600 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 81 [2020-10-12 16:07:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:13,601 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2020-10-12 16:07:13,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:07:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2020-10-12 16:07:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 16:07:13,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:13,602 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:13,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:07:13,602 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:13,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:13,603 INFO L82 PathProgramCache]: Analyzing trace with hash -22395406, now seen corresponding path program 24 times [2020-10-12 16:07:13,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:13,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860150764] [2020-10-12 16:07:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:13,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:14,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:14,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 16:07:14,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:14,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 946 [2020-10-12 16:07:14,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:14,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:07:14,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:14,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 16:07:14,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:15,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:15,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:15,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:15,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:15,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:15,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:15,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:15,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:15,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:15,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:15,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:15,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860150764] [2020-10-12 16:07:15,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:15,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:07:15,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614815925] [2020-10-12 16:07:15,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:07:15,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:15,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:07:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:07:15,159 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand 29 states. [2020-10-12 16:07:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:16,061 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-10-12 16:07:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:07:16,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 84 [2020-10-12 16:07:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:16,064 INFO L225 Difference]: With dead ends: 93 [2020-10-12 16:07:16,065 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 16:07:16,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:07:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 16:07:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-12 16:07:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 16:07:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2020-10-12 16:07:16,078 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 84 [2020-10-12 16:07:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:16,079 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2020-10-12 16:07:16,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:07:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2020-10-12 16:07:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 16:07:16,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:16,081 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:16,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:07:16,081 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1933993047, now seen corresponding path program 25 times [2020-10-12 16:07:16,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:16,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38375623] [2020-10-12 16:07:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:16,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:17,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:17,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 16:07:17,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:17,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-12 16:07:17,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:07:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 16:07:17,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:17,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:17,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:17,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:17,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:17,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:17,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:17,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:17,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:17,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:17,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:17,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:17,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38375623] [2020-10-12 16:07:17,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:17,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:07:17,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330319696] [2020-10-12 16:07:17,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:07:17,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:17,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:07:17,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:07:17,653 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand 30 states. [2020-10-12 16:07:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:18,642 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-10-12 16:07:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:07:18,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-10-12 16:07:18,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:18,646 INFO L225 Difference]: With dead ends: 96 [2020-10-12 16:07:18,646 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 16:07:18,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:07:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 16:07:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-12 16:07:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 16:07:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2020-10-12 16:07:18,655 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 87 [2020-10-12 16:07:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:18,655 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2020-10-12 16:07:18,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:07:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2020-10-12 16:07:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:07:18,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:18,656 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:18,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:07:18,657 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash 927028882, now seen corresponding path program 26 times [2020-10-12 16:07:18,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:18,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249591326] [2020-10-12 16:07:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:18,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:19,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:19,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 16:07:19,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:19,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-10-12 16:07:19,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:19,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:07:19,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:19,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 16:07:19,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:20,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:20,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:20,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:20,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:20,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:20,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:20,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:20,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:20,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:20,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:20,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:20,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249591326] [2020-10-12 16:07:20,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:20,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:07:20,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732805511] [2020-10-12 16:07:20,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:07:20,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:07:20,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:07:20,243 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand 31 states. [2020-10-12 16:07:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:21,305 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2020-10-12 16:07:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:07:21,306 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 90 [2020-10-12 16:07:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:21,307 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:07:21,308 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 16:07:21,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:07:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 16:07:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-12 16:07:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 16:07:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2020-10-12 16:07:21,316 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 90 [2020-10-12 16:07:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:21,317 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2020-10-12 16:07:21,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:07:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2020-10-12 16:07:21,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 16:07:21,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:21,318 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:21,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:07:21,318 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash 5326601, now seen corresponding path program 27 times [2020-10-12 16:07:21,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:21,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981874784] [2020-10-12 16:07:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:21,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:22,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:22,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 16:07:22,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:22,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-12 16:07:22,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:07:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:22,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 16:07:22,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:22,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:22,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:22,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:22,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:22,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:22,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:22,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:22,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:22,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:22,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:22,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:22,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981874784] [2020-10-12 16:07:22,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:22,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:07:22,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987213613] [2020-10-12 16:07:22,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:07:22,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:22,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:07:22,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:07:22,871 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 32 states. [2020-10-12 16:07:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:24,034 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2020-10-12 16:07:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:07:24,034 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-10-12 16:07:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:24,036 INFO L225 Difference]: With dead ends: 102 [2020-10-12 16:07:24,036 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 16:07:24,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:07:24,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 16:07:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-12 16:07:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 16:07:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2020-10-12 16:07:24,045 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 93 [2020-10-12 16:07:24,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:24,045 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2020-10-12 16:07:24,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:07:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2020-10-12 16:07:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 16:07:24,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:24,046 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:24,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:07:24,047 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash -701403342, now seen corresponding path program 28 times [2020-10-12 16:07:24,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:24,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118388916] [2020-10-12 16:07:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:24,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:24,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:24,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 16:07:24,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:24,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 855 [2020-10-12 16:07:24,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:07:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-12 16:07:24,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:25,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:25,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:25,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:25,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:25,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:25,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:25,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:25,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:25,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:25,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118388916] [2020-10-12 16:07:25,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:25,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:07:25,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821615253] [2020-10-12 16:07:25,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:07:25,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:25,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:07:25,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:07:25,689 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 33 states. [2020-10-12 16:07:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:26,905 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2020-10-12 16:07:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:07:26,906 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 96 [2020-10-12 16:07:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:26,907 INFO L225 Difference]: With dead ends: 105 [2020-10-12 16:07:26,907 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 16:07:26,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:07:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 16:07:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-12 16:07:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 16:07:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2020-10-12 16:07:26,917 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 96 [2020-10-12 16:07:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:26,918 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2020-10-12 16:07:26,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:07:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2020-10-12 16:07:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 16:07:26,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:26,919 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:26,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:07:26,920 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:26,920 INFO L82 PathProgramCache]: Analyzing trace with hash -963450263, now seen corresponding path program 29 times [2020-10-12 16:07:26,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:26,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046319301] [2020-10-12 16:07:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:26,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:27,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:27,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 16:07:27,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 825 [2020-10-12 16:07:27,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:07:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 16:07:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:28,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:28,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:28,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:28,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:28,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:28,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:28,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:28,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:28,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:28,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:28,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046319301] [2020-10-12 16:07:28,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:28,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:07:28,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258419359] [2020-10-12 16:07:28,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:07:28,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:28,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:07:28,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:07:28,516 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand 34 states. [2020-10-12 16:07:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:29,783 INFO L93 Difference]: Finished difference Result 108 states and 139 transitions. [2020-10-12 16:07:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:07:29,784 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 99 [2020-10-12 16:07:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:29,785 INFO L225 Difference]: With dead ends: 108 [2020-10-12 16:07:29,786 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 16:07:29,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:07:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 16:07:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-12 16:07:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 16:07:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2020-10-12 16:07:29,799 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 99 [2020-10-12 16:07:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:29,799 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2020-10-12 16:07:29,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:07:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2020-10-12 16:07:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 16:07:29,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:29,801 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:29,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:07:29,801 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash 647270354, now seen corresponding path program 30 times [2020-10-12 16:07:29,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:29,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044262913] [2020-10-12 16:07:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:29,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:30,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:30,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 16:07:30,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:30,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-12 16:07:30,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:30,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:07:30,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:30,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-12 16:07:30,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:31,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:31,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:31,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:31,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:31,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:31,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:31,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:31,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:31,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:31,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:31,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:31,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044262913] [2020-10-12 16:07:31,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:31,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:07:31,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380651490] [2020-10-12 16:07:31,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:07:31,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:31,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:07:31,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:07:31,669 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand 35 states. [2020-10-12 16:07:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:33,038 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2020-10-12 16:07:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:07:33,039 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 102 [2020-10-12 16:07:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:33,040 INFO L225 Difference]: With dead ends: 111 [2020-10-12 16:07:33,040 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 16:07:33,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:07:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 16:07:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-12 16:07:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 16:07:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2020-10-12 16:07:33,050 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 102 [2020-10-12 16:07:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:33,051 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2020-10-12 16:07:33,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:07:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2020-10-12 16:07:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-12 16:07:33,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:33,052 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:33,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:07:33,053 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2044426807, now seen corresponding path program 31 times [2020-10-12 16:07:33,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:33,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168571585] [2020-10-12 16:07:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:33,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:33,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:33,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-12 16:07:33,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:33,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 830 [2020-10-12 16:07:33,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:33,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:07:33,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:33,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 16:07:33,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:34,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:34,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:34,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:34,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:34,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:34,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:34,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:34,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:34,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:34,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:34,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:34,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168571585] [2020-10-12 16:07:34,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:34,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:07:34,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241561158] [2020-10-12 16:07:34,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:07:34,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:07:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:07:34,858 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand 36 states. [2020-10-12 16:07:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:36,340 INFO L93 Difference]: Finished difference Result 114 states and 147 transitions. [2020-10-12 16:07:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:07:36,340 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 105 [2020-10-12 16:07:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:36,342 INFO L225 Difference]: With dead ends: 114 [2020-10-12 16:07:36,342 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 16:07:36,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:07:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 16:07:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-12 16:07:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 16:07:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 142 transitions. [2020-10-12 16:07:36,353 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 142 transitions. Word has length 105 [2020-10-12 16:07:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:36,353 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 142 transitions. [2020-10-12 16:07:36,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:07:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 142 transitions. [2020-10-12 16:07:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 16:07:36,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:36,354 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:36,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:07:36,355 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:36,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:36,355 INFO L82 PathProgramCache]: Analyzing trace with hash 939833458, now seen corresponding path program 32 times [2020-10-12 16:07:36,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:36,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25464013] [2020-10-12 16:07:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:36,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:37,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:37,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 16:07:37,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:37,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-12 16:07:37,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:37,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:07:37,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:37,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-12 16:07:37,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:38,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:38,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:38,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:38,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:38,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:38,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:38,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:38,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:38,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:38,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:38,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:38,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25464013] [2020-10-12 16:07:38,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:38,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:07:38,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661325960] [2020-10-12 16:07:38,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:07:38,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:38,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:07:38,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:07:38,237 INFO L87 Difference]: Start difference. First operand 109 states and 142 transitions. Second operand 37 states. [2020-10-12 16:07:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:39,842 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2020-10-12 16:07:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:07:39,843 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 108 [2020-10-12 16:07:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:39,845 INFO L225 Difference]: With dead ends: 117 [2020-10-12 16:07:39,845 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 16:07:39,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:07:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 16:07:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-12 16:07:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 16:07:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 146 transitions. [2020-10-12 16:07:39,856 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 146 transitions. Word has length 108 [2020-10-12 16:07:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:39,857 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 146 transitions. [2020-10-12 16:07:39,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:07:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 146 transitions. [2020-10-12 16:07:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-12 16:07:39,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:39,858 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:39,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:07:39,858 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash -785639127, now seen corresponding path program 33 times [2020-10-12 16:07:39,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:39,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615343608] [2020-10-12 16:07:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:40,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:40,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 16:07:40,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:40,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 949 [2020-10-12 16:07:40,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:40,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:07:40,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:40,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 16:07:40,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:41,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:41,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:41,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:41,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:41,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:41,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:41,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:41,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:41,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:41,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615343608] [2020-10-12 16:07:41,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:41,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:07:41,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621670655] [2020-10-12 16:07:41,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:07:41,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:41,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:07:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:07:41,829 INFO L87 Difference]: Start difference. First operand 112 states and 146 transitions. Second operand 38 states. [2020-10-12 16:07:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:43,546 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2020-10-12 16:07:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:07:43,547 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 111 [2020-10-12 16:07:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:43,548 INFO L225 Difference]: With dead ends: 120 [2020-10-12 16:07:43,548 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 16:07:43,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:07:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 16:07:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-12 16:07:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 16:07:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 150 transitions. [2020-10-12 16:07:43,560 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 150 transitions. Word has length 111 [2020-10-12 16:07:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:43,560 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 150 transitions. [2020-10-12 16:07:43,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:07:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 150 transitions. [2020-10-12 16:07:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 16:07:43,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:43,562 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:43,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:07:43,562 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:43,562 INFO L82 PathProgramCache]: Analyzing trace with hash 2124146962, now seen corresponding path program 34 times [2020-10-12 16:07:43,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:43,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587229237] [2020-10-12 16:07:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:43,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:44,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:44,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 16:07:44,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:44,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-10-12 16:07:44,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:44,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:07:44,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:44,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-12 16:07:44,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:45,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:45,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:45,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:45,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:45,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:45,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:45,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:45,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:45,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:45,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:45,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:45,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587229237] [2020-10-12 16:07:45,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:45,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:07:45,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865161548] [2020-10-12 16:07:45,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:07:45,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:45,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:07:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:07:45,628 INFO L87 Difference]: Start difference. First operand 115 states and 150 transitions. Second operand 39 states. [2020-10-12 16:07:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:47,421 INFO L93 Difference]: Finished difference Result 123 states and 159 transitions. [2020-10-12 16:07:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:07:47,422 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 114 [2020-10-12 16:07:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:47,424 INFO L225 Difference]: With dead ends: 123 [2020-10-12 16:07:47,424 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 16:07:47,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:07:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 16:07:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-12 16:07:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 16:07:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2020-10-12 16:07:47,437 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 114 [2020-10-12 16:07:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:47,437 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2020-10-12 16:07:47,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:07:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2020-10-12 16:07:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-12 16:07:47,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:47,439 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:47,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:07:47,439 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2058378103, now seen corresponding path program 35 times [2020-10-12 16:07:47,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:47,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552452609] [2020-10-12 16:07:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:47,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:48,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:48,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-12 16:07:48,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:48,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1147 [2020-10-12 16:07:48,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:48,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:07:48,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:48,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-12 16:07:48,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:49,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:49,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:49,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:49,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:49,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:49,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:49,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:49,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:49,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552452609] [2020-10-12 16:07:49,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:49,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:07:49,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012724374] [2020-10-12 16:07:49,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:07:49,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:07:49,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:07:49,719 INFO L87 Difference]: Start difference. First operand 118 states and 154 transitions. Second operand 40 states. [2020-10-12 16:07:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:51,642 INFO L93 Difference]: Finished difference Result 126 states and 163 transitions. [2020-10-12 16:07:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:07:51,642 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2020-10-12 16:07:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:51,644 INFO L225 Difference]: With dead ends: 126 [2020-10-12 16:07:51,644 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 16:07:51,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:07:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 16:07:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-12 16:07:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 16:07:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 158 transitions. [2020-10-12 16:07:51,654 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 158 transitions. Word has length 117 [2020-10-12 16:07:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:51,655 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 158 transitions. [2020-10-12 16:07:51,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:07:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 158 transitions. [2020-10-12 16:07:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 16:07:51,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:51,656 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:51,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:07:51,656 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1928602034, now seen corresponding path program 36 times [2020-10-12 16:07:51,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:51,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184755338] [2020-10-12 16:07:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:51,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:52,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:52,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 16:07:52,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:52,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-12 16:07:52,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:52,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:07:52,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:52,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-12 16:07:52,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:53,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:53,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:53,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:53,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:53,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:53,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:53,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:53,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:53,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:53,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:53,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:53,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184755338] [2020-10-12 16:07:53,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:53,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:07:53,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221986412] [2020-10-12 16:07:53,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:07:53,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:53,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:07:53,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:07:53,994 INFO L87 Difference]: Start difference. First operand 121 states and 158 transitions. Second operand 41 states. [2020-10-12 16:07:56,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:56,038 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2020-10-12 16:07:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:07:56,039 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 120 [2020-10-12 16:07:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:56,040 INFO L225 Difference]: With dead ends: 129 [2020-10-12 16:07:56,040 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 16:07:56,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:07:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 16:07:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-12 16:07:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 16:07:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2020-10-12 16:07:56,052 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 120 [2020-10-12 16:07:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:56,052 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2020-10-12 16:07:56,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:07:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2020-10-12 16:07:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-12 16:07:56,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:56,053 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:56,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:07:56,053 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:56,053 INFO L82 PathProgramCache]: Analyzing trace with hash 733292521, now seen corresponding path program 37 times [2020-10-12 16:07:56,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:56,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442021232] [2020-10-12 16:07:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:56,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:57,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:57,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-12 16:07:57,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:57,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1386 [2020-10-12 16:07:57,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:07:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:57,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-12 16:07:57,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:58,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:58,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:58,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:58,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:58,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:58,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:07:58,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:58,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:58,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:58,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:58,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:58,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442021232] [2020-10-12 16:07:58,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:58,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:07:58,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419692705] [2020-10-12 16:07:58,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:07:58,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:07:58,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:07:58,703 INFO L87 Difference]: Start difference. First operand 124 states and 162 transitions. Second operand 42 states. [2020-10-12 16:08:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:00,825 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions. [2020-10-12 16:08:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:08:00,826 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 123 [2020-10-12 16:08:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:00,827 INFO L225 Difference]: With dead ends: 132 [2020-10-12 16:08:00,828 INFO L226 Difference]: Without dead ends: 127 [2020-10-12 16:08:00,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:08:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-12 16:08:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-12 16:08:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 16:08:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2020-10-12 16:08:00,841 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 123 [2020-10-12 16:08:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:00,841 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2020-10-12 16:08:00,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:08:00,841 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2020-10-12 16:08:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 16:08:00,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:00,842 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:00,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:08:00,843 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:00,843 INFO L82 PathProgramCache]: Analyzing trace with hash 841441874, now seen corresponding path program 38 times [2020-10-12 16:08:00,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:00,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65559693] [2020-10-12 16:08:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:00,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:02,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:02,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 16:08:02,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:02,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-12 16:08:02,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:02,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:08:02,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:08:02,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-12 16:08:02,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:03,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:03,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:03,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:03,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:03,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:03,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:03,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:03,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:03,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65559693] [2020-10-12 16:08:03,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:03,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:08:03,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118358955] [2020-10-12 16:08:03,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:08:03,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:03,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:08:03,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:08:03,451 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand 43 states. [2020-10-12 16:08:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:05,691 INFO L93 Difference]: Finished difference Result 135 states and 175 transitions. [2020-10-12 16:08:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:08:05,692 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 126 [2020-10-12 16:08:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:05,694 INFO L225 Difference]: With dead ends: 135 [2020-10-12 16:08:05,694 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 16:08:05,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:08:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 16:08:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-12 16:08:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-12 16:08:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 170 transitions. [2020-10-12 16:08:05,708 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 170 transitions. Word has length 126 [2020-10-12 16:08:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:05,709 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 170 transitions. [2020-10-12 16:08:05,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:08:05,709 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 170 transitions. [2020-10-12 16:08:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-12 16:08:05,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:05,710 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:05,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:08:05,710 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:05,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1493345097, now seen corresponding path program 39 times [2020-10-12 16:08:05,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:05,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590333542] [2020-10-12 16:08:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:05,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:07,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:07,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-12 16:08:07,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:07,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-12 16:08:07,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:08:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:08:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-12 16:08:07,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:08,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:08,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:08,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:08,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:08,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:08,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:08,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:08,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:08,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:08,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:08,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:08,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590333542] [2020-10-12 16:08:08,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:08,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:08:08,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438420629] [2020-10-12 16:08:08,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:08:08,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:08:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:08:08,680 INFO L87 Difference]: Start difference. First operand 130 states and 170 transitions. Second operand 44 states. [2020-10-12 16:08:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:11,028 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2020-10-12 16:08:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:08:11,029 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 129 [2020-10-12 16:08:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:11,030 INFO L225 Difference]: With dead ends: 138 [2020-10-12 16:08:11,031 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 16:08:11,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:08:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 16:08:11,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-12 16:08:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 16:08:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2020-10-12 16:08:11,042 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 129 [2020-10-12 16:08:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:11,042 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2020-10-12 16:08:11,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:08:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2020-10-12 16:08:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 16:08:11,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:11,043 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:11,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:08:11,043 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:11,044 INFO L82 PathProgramCache]: Analyzing trace with hash 500148978, now seen corresponding path program 40 times [2020-10-12 16:08:11,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:11,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663179368] [2020-10-12 16:08:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:11,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:12,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:12,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 16:08:12,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:12,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1499 [2020-10-12 16:08:12,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:12,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:08:12,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:08:12,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-12 16:08:12,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:13,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:13,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:13,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:13,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:13,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:13,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:08:13,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:13,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:13,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:13,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:13,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:14,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663179368] [2020-10-12 16:08:14,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:14,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:08:14,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537307259] [2020-10-12 16:08:14,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:08:14,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:14,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:08:14,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:08:14,001 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand 45 states. [2020-10-12 16:08:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:16,327 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2020-10-12 16:08:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:08:16,328 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 132 [2020-10-12 16:08:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:16,329 INFO L225 Difference]: With dead ends: 141 [2020-10-12 16:08:16,330 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 16:08:16,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:08:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 16:08:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-12 16:08:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 16:08:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 178 transitions. [2020-10-12 16:08:16,350 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 178 transitions. Word has length 132 [2020-10-12 16:08:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:16,351 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 178 transitions. [2020-10-12 16:08:16,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:08:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 178 transitions. [2020-10-12 16:08:16,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-12 16:08:16,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:16,352 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:16,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:08:16,353 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:16,353 INFO L82 PathProgramCache]: Analyzing trace with hash 224269993, now seen corresponding path program 41 times [2020-10-12 16:08:16,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:16,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77861471] [2020-10-12 16:08:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:16,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:17,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:17,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-12 16:08:17,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:17,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1584 [2020-10-12 16:08:17,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:17,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:08:17,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:08:17,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-12 16:08:17,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:19,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:19,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:19,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:19,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:19,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:19,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:08:19,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:19,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:19,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:19,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:08:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:19,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77861471] [2020-10-12 16:08:19,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:19,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:08:19,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544432094] [2020-10-12 16:08:19,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:08:19,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:19,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:08:19,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:08:19,404 INFO L87 Difference]: Start difference. First operand 136 states and 178 transitions. Second operand 46 states. [2020-10-12 16:08:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:21,904 INFO L93 Difference]: Finished difference Result 144 states and 187 transitions. [2020-10-12 16:08:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:08:21,905 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 135 [2020-10-12 16:08:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:21,907 INFO L225 Difference]: With dead ends: 144 [2020-10-12 16:08:21,907 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 16:08:21,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:08:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 16:08:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-12 16:08:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 16:08:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 182 transitions. [2020-10-12 16:08:21,921 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 182 transitions. Word has length 135 [2020-10-12 16:08:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:21,921 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 182 transitions. [2020-10-12 16:08:21,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:08:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 182 transitions. [2020-10-12 16:08:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 16:08:21,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:21,923 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:21,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:08:21,923 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:21,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:21,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2080832402, now seen corresponding path program 42 times [2020-10-12 16:08:21,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:21,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969445980] [2020-10-12 16:08:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:21,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:23,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:23,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 16:08:23,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:23,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1546 [2020-10-12 16:08:23,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:08:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:08:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-12 16:08:23,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:25,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:25,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:25,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:25,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:25,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:25,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:25,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:25,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:25,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969445980] [2020-10-12 16:08:25,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:25,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:08:25,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939777191] [2020-10-12 16:08:25,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:08:25,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:25,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:08:25,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:08:25,033 INFO L87 Difference]: Start difference. First operand 139 states and 182 transitions. Second operand 47 states. [2020-10-12 16:08:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:27,620 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2020-10-12 16:08:27,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:08:27,621 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 138 [2020-10-12 16:08:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:27,622 INFO L225 Difference]: With dead ends: 147 [2020-10-12 16:08:27,622 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 16:08:27,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:08:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 16:08:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-12 16:08:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-12 16:08:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2020-10-12 16:08:27,637 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 138 [2020-10-12 16:08:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:27,637 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2020-10-12 16:08:27,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:08:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2020-10-12 16:08:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-12 16:08:27,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:27,639 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:27,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:08:27,639 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash 342721033, now seen corresponding path program 43 times [2020-10-12 16:08:27,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:27,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068051761] [2020-10-12 16:08:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:27,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:29,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:29,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-12 16:08:29,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:29,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1868 [2020-10-12 16:08:29,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:29,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:08:29,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:08:29,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-12 16:08:29,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:31,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:31,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:31,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:31,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:31,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:31,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:31,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:31,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:31,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:31,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:31,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:31,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068051761] [2020-10-12 16:08:31,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:31,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:08:31,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014548424] [2020-10-12 16:08:31,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:08:31,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:31,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:08:31,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:08:31,108 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand 48 states. [2020-10-12 16:08:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:33,757 INFO L93 Difference]: Finished difference Result 150 states and 195 transitions. [2020-10-12 16:08:33,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:08:33,758 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 141 [2020-10-12 16:08:33,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:33,759 INFO L225 Difference]: With dead ends: 150 [2020-10-12 16:08:33,760 INFO L226 Difference]: Without dead ends: 145 [2020-10-12 16:08:33,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:08:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-12 16:08:33,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-12 16:08:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 16:08:33,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 190 transitions. [2020-10-12 16:08:33,774 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 190 transitions. Word has length 141 [2020-10-12 16:08:33,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:33,774 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 190 transitions. [2020-10-12 16:08:33,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:08:33,774 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 190 transitions. [2020-10-12 16:08:33,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-12 16:08:33,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:33,775 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:33,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:08:33,775 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:33,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:33,776 INFO L82 PathProgramCache]: Analyzing trace with hash 392647730, now seen corresponding path program 44 times [2020-10-12 16:08:33,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:33,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779864934] [2020-10-12 16:08:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:33,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:35,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:35,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-12 16:08:35,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:35,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-12 16:08:35,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:35,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:08:35,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:08:35,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-12 16:08:35,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:37,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:37,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:37,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:37,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:37,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:37,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:37,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:37,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:37,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:37,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:37,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:37,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779864934] [2020-10-12 16:08:37,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:37,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:08:37,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819895750] [2020-10-12 16:08:37,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:08:37,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:37,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:08:37,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:08:37,294 INFO L87 Difference]: Start difference. First operand 145 states and 190 transitions. Second operand 49 states. [2020-10-12 16:08:40,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:40,214 INFO L93 Difference]: Finished difference Result 153 states and 199 transitions. [2020-10-12 16:08:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:08:40,215 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 144 [2020-10-12 16:08:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:40,217 INFO L225 Difference]: With dead ends: 153 [2020-10-12 16:08:40,217 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 16:08:40,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:08:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 16:08:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-12 16:08:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-12 16:08:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2020-10-12 16:08:40,232 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 144 [2020-10-12 16:08:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:40,232 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2020-10-12 16:08:40,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:08:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2020-10-12 16:08:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-12 16:08:40,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:40,233 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:40,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:08:40,234 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:40,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1700193641, now seen corresponding path program 45 times [2020-10-12 16:08:40,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:40,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274672459] [2020-10-12 16:08:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:40,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:42,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:42,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-12 16:08:42,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:42,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1836 [2020-10-12 16:08:42,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:08:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:08:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-12 16:08:42,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:43,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:43,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:43,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:43,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:43,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:43,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:43,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:43,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274672459] [2020-10-12 16:08:43,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:43,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:08:43,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981236156] [2020-10-12 16:08:43,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:08:43,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:43,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:08:43,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:08:43,840 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand 50 states. [2020-10-12 16:08:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:46,778 INFO L93 Difference]: Finished difference Result 156 states and 203 transitions. [2020-10-12 16:08:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:08:46,779 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 147 [2020-10-12 16:08:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:46,781 INFO L225 Difference]: With dead ends: 156 [2020-10-12 16:08:46,781 INFO L226 Difference]: Without dead ends: 151 [2020-10-12 16:08:46,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:08:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-12 16:08:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-12 16:08:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 16:08:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2020-10-12 16:08:46,797 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 147 [2020-10-12 16:08:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:46,797 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2020-10-12 16:08:46,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:08:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2020-10-12 16:08:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 16:08:46,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:46,798 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:46,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:08:46,798 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:46,798 INFO L82 PathProgramCache]: Analyzing trace with hash -552946478, now seen corresponding path program 46 times [2020-10-12 16:08:46,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:46,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252284097] [2020-10-12 16:08:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:48,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:48,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 16:08:48,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:48,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1855 [2020-10-12 16:08:48,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:48,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 16:08:48,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:08:48,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-12 16:08:48,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:50,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:50,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:50,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:50,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:50,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:50,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:08:50,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:50,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:50,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252284097] [2020-10-12 16:08:50,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:50,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 16:08:50,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38572994] [2020-10-12 16:08:50,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 16:08:50,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:50,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 16:08:50,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:08:50,529 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand 51 states. [2020-10-12 16:08:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:08:53,506 INFO L93 Difference]: Finished difference Result 159 states and 207 transitions. [2020-10-12 16:08:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 16:08:53,506 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 150 [2020-10-12 16:08:53,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:08:53,508 INFO L225 Difference]: With dead ends: 159 [2020-10-12 16:08:53,508 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 16:08:53,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:08:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 16:08:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-12 16:08:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 16:08:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 202 transitions. [2020-10-12 16:08:53,522 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 202 transitions. Word has length 150 [2020-10-12 16:08:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:08:53,522 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 202 transitions. [2020-10-12 16:08:53,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 16:08:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 202 transitions. [2020-10-12 16:08:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-12 16:08:53,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:08:53,524 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:08:53,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:08:53,524 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:08:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:08:53,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2101329719, now seen corresponding path program 47 times [2020-10-12 16:08:53,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:08:53,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842622416] [2020-10-12 16:08:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:08:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:53,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:55,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:55,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-12 16:08:55,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:55,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2038 [2020-10-12 16:08:55,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:08:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:08:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-12 16:08:55,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:57,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:08:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:08:57,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:08:57,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:08:57,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:08:57,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:08:57,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:08:57,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:08:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:08:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:08:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:08:57,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:08:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:08:57,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842622416] [2020-10-12 16:08:57,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:08:57,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:08:57,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223199784] [2020-10-12 16:08:57,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:08:57,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:08:57,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:08:57,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:08:57,509 INFO L87 Difference]: Start difference. First operand 154 states and 202 transitions. Second operand 52 states. [2020-10-12 16:09:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:00,603 INFO L93 Difference]: Finished difference Result 162 states and 211 transitions. [2020-10-12 16:09:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:09:00,604 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 153 [2020-10-12 16:09:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:00,605 INFO L225 Difference]: With dead ends: 162 [2020-10-12 16:09:00,605 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 16:09:00,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:09:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 16:09:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-12 16:09:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 16:09:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2020-10-12 16:09:00,623 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 153 [2020-10-12 16:09:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:00,623 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2020-10-12 16:09:00,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 16:09:00,624 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2020-10-12 16:09:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 16:09:00,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:00,625 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:00,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:09:00,625 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2037703310, now seen corresponding path program 48 times [2020-10-12 16:09:00,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:00,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744913428] [2020-10-12 16:09:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:00,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:02,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:02,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-12 16:09:02,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:02,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2026 [2020-10-12 16:09:02,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:02,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:09:02,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:02,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-12 16:09:02,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:04,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:04,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:04,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:04,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:04,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:04,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:04,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:04,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:04,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:04,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:04,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:04,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744913428] [2020-10-12 16:09:04,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:04,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:09:04,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958089665] [2020-10-12 16:09:04,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:09:04,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:04,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:09:04,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:09:04,709 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand 53 states. [2020-10-12 16:09:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:07,955 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2020-10-12 16:09:07,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:09:07,956 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 156 [2020-10-12 16:09:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:07,958 INFO L225 Difference]: With dead ends: 165 [2020-10-12 16:09:07,958 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 16:09:07,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:09:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 16:09:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-12 16:09:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 16:09:07,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 210 transitions. [2020-10-12 16:09:07,975 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 210 transitions. Word has length 156 [2020-10-12 16:09:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:07,976 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 210 transitions. [2020-10-12 16:09:07,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:09:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 210 transitions. [2020-10-12 16:09:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-12 16:09:07,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:07,977 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:07,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:09:07,977 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:07,978 INFO L82 PathProgramCache]: Analyzing trace with hash -623930327, now seen corresponding path program 49 times [2020-10-12 16:09:07,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:07,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969223009] [2020-10-12 16:09:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:08,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:10,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:10,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-12 16:09:10,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:10,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2186 [2020-10-12 16:09:10,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:09:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-12 16:09:10,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:12,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:12,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:12,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:12,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:12,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:12,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:12,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:12,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:12,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969223009] [2020-10-12 16:09:12,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:12,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:09:12,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040060240] [2020-10-12 16:09:12,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:09:12,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:12,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:09:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:09:12,309 INFO L87 Difference]: Start difference. First operand 160 states and 210 transitions. Second operand 54 states. [2020-10-12 16:09:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:15,612 INFO L93 Difference]: Finished difference Result 168 states and 219 transitions. [2020-10-12 16:09:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:09:15,613 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 159 [2020-10-12 16:09:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:15,614 INFO L225 Difference]: With dead ends: 168 [2020-10-12 16:09:15,614 INFO L226 Difference]: Without dead ends: 163 [2020-10-12 16:09:15,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:09:15,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-12 16:09:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-12 16:09:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 16:09:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 214 transitions. [2020-10-12 16:09:15,629 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 214 transitions. Word has length 159 [2020-10-12 16:09:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:15,629 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 214 transitions. [2020-10-12 16:09:15,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:09:15,630 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 214 transitions. [2020-10-12 16:09:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-12 16:09:15,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:15,631 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:15,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:09:15,631 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:15,631 INFO L82 PathProgramCache]: Analyzing trace with hash 637701650, now seen corresponding path program 50 times [2020-10-12 16:09:15,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:15,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796704774] [2020-10-12 16:09:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:15,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:17,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:17,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-12 16:09:17,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:17,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2332 [2020-10-12 16:09:17,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:17,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 16:09:17,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:17,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-12 16:09:17,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:20,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:20,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:20,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:20,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:20,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:20,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:20,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:20,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:20,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:20,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:20,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:20,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796704774] [2020-10-12 16:09:20,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:20,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 16:09:20,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914360847] [2020-10-12 16:09:20,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 16:09:20,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:20,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 16:09:20,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:09:20,191 INFO L87 Difference]: Start difference. First operand 163 states and 214 transitions. Second operand 55 states. [2020-10-12 16:09:23,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:23,886 INFO L93 Difference]: Finished difference Result 171 states and 223 transitions. [2020-10-12 16:09:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:09:23,887 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 162 [2020-10-12 16:09:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:23,889 INFO L225 Difference]: With dead ends: 171 [2020-10-12 16:09:23,889 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 16:09:23,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:09:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 16:09:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-12 16:09:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 16:09:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 218 transitions. [2020-10-12 16:09:23,904 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 218 transitions. Word has length 162 [2020-10-12 16:09:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:23,904 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 218 transitions. [2020-10-12 16:09:23,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 16:09:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 218 transitions. [2020-10-12 16:09:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-12 16:09:23,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:23,905 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:23,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:09:23,906 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:23,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:23,906 INFO L82 PathProgramCache]: Analyzing trace with hash 657121161, now seen corresponding path program 51 times [2020-10-12 16:09:23,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:23,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112889970] [2020-10-12 16:09:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:24,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:26,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-12 16:09:26,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:26,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2469 [2020-10-12 16:09:26,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:09:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-12 16:09:26,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:28,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:28,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:28,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:28,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:28,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:28,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:28,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:28,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:28,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:28,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 0 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:28,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112889970] [2020-10-12 16:09:28,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:28,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:09:28,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725828957] [2020-10-12 16:09:28,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:09:28,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:28,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:09:28,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:09:28,727 INFO L87 Difference]: Start difference. First operand 166 states and 218 transitions. Second operand 56 states. [2020-10-12 16:09:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:32,413 INFO L93 Difference]: Finished difference Result 174 states and 227 transitions. [2020-10-12 16:09:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:09:32,414 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 165 [2020-10-12 16:09:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:32,415 INFO L225 Difference]: With dead ends: 174 [2020-10-12 16:09:32,416 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 16:09:32,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:09:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 16:09:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-12 16:09:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 16:09:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 222 transitions. [2020-10-12 16:09:32,433 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 222 transitions. Word has length 165 [2020-10-12 16:09:32,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:32,433 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 222 transitions. [2020-10-12 16:09:32,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:09:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 222 transitions. [2020-10-12 16:09:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-12 16:09:32,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:32,434 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:32,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:09:32,434 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:32,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:32,435 INFO L82 PathProgramCache]: Analyzing trace with hash -636811598, now seen corresponding path program 52 times [2020-10-12 16:09:32,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:32,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629364004] [2020-10-12 16:09:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:32,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:35,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-12 16:09:35,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:35,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2628 [2020-10-12 16:09:35,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:09:35,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:35,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-12 16:09:35,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:37,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:37,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:37,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:37,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:37,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:37,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:37,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:37,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:37,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:37,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 0 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:37,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629364004] [2020-10-12 16:09:37,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:37,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:09:37,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400373934] [2020-10-12 16:09:37,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:09:37,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:37,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:09:37,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:09:37,525 INFO L87 Difference]: Start difference. First operand 169 states and 222 transitions. Second operand 57 states. [2020-10-12 16:09:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:41,383 INFO L93 Difference]: Finished difference Result 177 states and 231 transitions. [2020-10-12 16:09:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 16:09:41,385 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 168 [2020-10-12 16:09:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:41,386 INFO L225 Difference]: With dead ends: 177 [2020-10-12 16:09:41,387 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 16:09:41,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:09:41,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 16:09:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-12 16:09:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 16:09:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 226 transitions. [2020-10-12 16:09:41,406 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 226 transitions. Word has length 168 [2020-10-12 16:09:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:41,406 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 226 transitions. [2020-10-12 16:09:41,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:09:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 226 transitions. [2020-10-12 16:09:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-12 16:09:41,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:41,407 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:41,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:09:41,408 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash -856153367, now seen corresponding path program 53 times [2020-10-12 16:09:41,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:41,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319011754] [2020-10-12 16:09:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:41,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:44,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-12 16:09:44,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:44,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2884 [2020-10-12 16:09:44,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:44,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 16:09:44,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:44,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-12 16:09:44,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:46,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:46,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:46,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:46,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:46,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:46,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:46,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:46,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:46,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:46,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 0 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:46,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319011754] [2020-10-12 16:09:46,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:46,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 16:09:46,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341761651] [2020-10-12 16:09:46,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 16:09:46,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 16:09:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:09:46,935 INFO L87 Difference]: Start difference. First operand 172 states and 226 transitions. Second operand 58 states. [2020-10-12 16:09:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:50,884 INFO L93 Difference]: Finished difference Result 180 states and 235 transitions. [2020-10-12 16:09:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:09:50,885 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 171 [2020-10-12 16:09:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:50,886 INFO L225 Difference]: With dead ends: 180 [2020-10-12 16:09:50,886 INFO L226 Difference]: Without dead ends: 175 [2020-10-12 16:09:50,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:09:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-12 16:09:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-10-12 16:09:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-12 16:09:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2020-10-12 16:09:50,906 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 171 [2020-10-12 16:09:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:50,906 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2020-10-12 16:09:50,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 16:09:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2020-10-12 16:09:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-12 16:09:50,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:50,907 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:50,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:09:50,908 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1673430866, now seen corresponding path program 54 times [2020-10-12 16:09:50,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:50,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414679979] [2020-10-12 16:09:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:50,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:53,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 16:09:53,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:53,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2674 [2020-10-12 16:09:53,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:53,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 16:09:53,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:53,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-12 16:09:53,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:56,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:56,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:56,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:56,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:56,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:56,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:56,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:56,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:56,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:56,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:56,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 0 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:56,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414679979] [2020-10-12 16:09:56,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:56,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 16:09:56,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806358380] [2020-10-12 16:09:56,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 16:09:56,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:56,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 16:09:56,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:09:56,295 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand 59 states. [2020-10-12 16:10:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:00,461 INFO L93 Difference]: Finished difference Result 183 states and 239 transitions. [2020-10-12 16:10:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 16:10:00,463 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 174 [2020-10-12 16:10:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:00,464 INFO L225 Difference]: With dead ends: 183 [2020-10-12 16:10:00,465 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 16:10:00,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:10:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 16:10:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-12 16:10:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 16:10:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 234 transitions. [2020-10-12 16:10:00,479 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 234 transitions. Word has length 174 [2020-10-12 16:10:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:00,479 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 234 transitions. [2020-10-12 16:10:00,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 16:10:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 234 transitions. [2020-10-12 16:10:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-12 16:10:00,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:00,480 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:00,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:10:00,480 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:00,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1021140553, now seen corresponding path program 55 times [2020-10-12 16:10:00,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:00,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080810148] [2020-10-12 16:10:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:00,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:03,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:03,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-12 16:10:03,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:03,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2781 [2020-10-12 16:10:03,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 16:10:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-12 16:10:03,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:06,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:06,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:06,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:06,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:06,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:06,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:06,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:06,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:06,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080810148] [2020-10-12 16:10:06,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:06,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 16:10:06,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504181794] [2020-10-12 16:10:06,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 16:10:06,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:06,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 16:10:06,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:10:06,145 INFO L87 Difference]: Start difference. First operand 178 states and 234 transitions. Second operand 60 states. [2020-10-12 16:10:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:10,412 INFO L93 Difference]: Finished difference Result 186 states and 243 transitions. [2020-10-12 16:10:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 16:10:10,413 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 177 [2020-10-12 16:10:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:10,415 INFO L225 Difference]: With dead ends: 186 [2020-10-12 16:10:10,415 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 16:10:10,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:10:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 16:10:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2020-10-12 16:10:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 16:10:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 238 transitions. [2020-10-12 16:10:10,436 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 238 transitions. Word has length 177 [2020-10-12 16:10:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:10,437 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 238 transitions. [2020-10-12 16:10:10,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 16:10:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 238 transitions. [2020-10-12 16:10:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-12 16:10:10,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:10,438 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:10,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:10:10,439 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:10,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:10,439 INFO L82 PathProgramCache]: Analyzing trace with hash -927526926, now seen corresponding path program 56 times [2020-10-12 16:10:10,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:10,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347065618] [2020-10-12 16:10:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:10,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:13,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:13,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-12 16:10:13,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:13,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3076 [2020-10-12 16:10:13,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:13,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 16:10:13,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:13,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-12 16:10:13,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:16,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:16,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:16,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 0 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:16,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347065618] [2020-10-12 16:10:16,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:16,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 16:10:16,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160706071] [2020-10-12 16:10:16,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 16:10:16,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 16:10:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:10:16,721 INFO L87 Difference]: Start difference. First operand 181 states and 238 transitions. Second operand 61 states. [2020-10-12 16:10:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:21,140 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2020-10-12 16:10:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 16:10:21,142 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 180 [2020-10-12 16:10:21,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:21,144 INFO L225 Difference]: With dead ends: 189 [2020-10-12 16:10:21,144 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 16:10:21,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:10:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 16:10:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-12 16:10:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 16:10:21,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 242 transitions. [2020-10-12 16:10:21,165 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 242 transitions. Word has length 180 [2020-10-12 16:10:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:21,165 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 242 transitions. [2020-10-12 16:10:21,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 16:10:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 242 transitions. [2020-10-12 16:10:21,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-12 16:10:21,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:21,167 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:21,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:10:21,167 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:21,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1392546217, now seen corresponding path program 57 times [2020-10-12 16:10:21,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:21,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35847519] [2020-10-12 16:10:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:21,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:24,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-12 16:10:24,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:24,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3193 [2020-10-12 16:10:24,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 16:10:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-12 16:10:24,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:27,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:27,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:27,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:27,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:27,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:27,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:27,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:27,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:27,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:27,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:27,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:27,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35847519] [2020-10-12 16:10:27,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:27,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 16:10:27,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461845217] [2020-10-12 16:10:27,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 16:10:27,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:27,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 16:10:27,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:10:27,652 INFO L87 Difference]: Start difference. First operand 184 states and 242 transitions. Second operand 62 states. [2020-10-12 16:10:32,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:32,423 INFO L93 Difference]: Finished difference Result 192 states and 251 transitions. [2020-10-12 16:10:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 16:10:32,424 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 183 [2020-10-12 16:10:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:32,426 INFO L225 Difference]: With dead ends: 192 [2020-10-12 16:10:32,426 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 16:10:32,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:10:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 16:10:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-12 16:10:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 16:10:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 246 transitions. [2020-10-12 16:10:32,446 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 246 transitions. Word has length 183 [2020-10-12 16:10:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:32,446 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 246 transitions. [2020-10-12 16:10:32,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 16:10:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 246 transitions. [2020-10-12 16:10:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-12 16:10:32,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:32,447 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:32,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:10:32,448 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:32,448 INFO L82 PathProgramCache]: Analyzing trace with hash -217145198, now seen corresponding path program 58 times [2020-10-12 16:10:32,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:32,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430298761] [2020-10-12 16:10:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:32,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:35,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:35,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-12 16:10:35,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:35,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3238 [2020-10-12 16:10:35,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:35,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 16:10:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 183 [2020-10-12 16:10:35,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:39,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:39,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:39,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:39,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:39,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 0 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:39,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430298761] [2020-10-12 16:10:39,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:39,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 16:10:39,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362624573] [2020-10-12 16:10:39,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 16:10:39,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:39,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 16:10:39,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:10:39,310 INFO L87 Difference]: Start difference. First operand 187 states and 246 transitions. Second operand 63 states.