/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=NARROWEST --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/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:51:37,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:51:37,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:51:37,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:51:37,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:51:37,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:51:37,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:51:37,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:51:37,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:51:37,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:51:37,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:51:37,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:51:37,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:51:37,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:51:37,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:51:37,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:51:37,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:51:37,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:51:37,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:51:37,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:51:37,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:51:37,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:51:37,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:51:37,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:51:37,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:51:37,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:51:37,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:51:37,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:51:37,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:51:37,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:51:37,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:51:37,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:51:37,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:51:37,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:51:37,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:51:37,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:51:37,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:51:37,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:51:37,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:51:37,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:51:37,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:51:37,464 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 [2020-10-13 10:51:37,490 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:51:37,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:51:37,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:51:37,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:51:37,492 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:51:37,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:51:37,492 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:51:37,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:51:37,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:51:37,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:51:37,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:51:37,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:51:37,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:51:37,493 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:51:37,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:51:37,494 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:51:37,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:51:37,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:51:37,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:51:37,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:51:37,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:51:37,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:51:37,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:51:37,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:51:37,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:51:37,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:51:37,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:51:37,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:51:37,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:51:37,497 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:51:37,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:51:37,868 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:51:37,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:51:37,876 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:51:37,876 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:51:37,877 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2020-10-13 10:51:37,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9592e4aa4/d8570663bed94562be414598d252ca26/FLAG4e92d6e90 [2020-10-13 10:51:38,368 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:51:38,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007.i [2020-10-13 10:51:38,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9592e4aa4/d8570663bed94562be414598d252ca26/FLAG4e92d6e90 [2020-10-13 10:51:38,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9592e4aa4/d8570663bed94562be414598d252ca26 [2020-10-13 10:51:38,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:51:38,763 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:51:38,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:38,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:51:38,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:51:38,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:38" (1/1) ... [2020-10-13 10:51:38,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cc40f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:38, skipping insertion in model container [2020-10-13 10:51:38,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:38" (1/1) ... [2020-10-13 10:51:38,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:51:38,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:51:38,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:38,969 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:51:38,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:39,000 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:51:39,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:39 WrapperNode [2020-10-13 10:51:39,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:39,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:51:39,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:51:39,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:51:39,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:39" (1/1) ... [2020-10-13 10:51:39,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:39" (1/1) ... [2020-10-13 10:51:39,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:39" (1/1) ... [2020-10-13 10:51:39,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:39" (1/1) ... [2020-10-13 10:51:39,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:39" (1/1) ... [2020-10-13 10:51:39,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:39" (1/1) ... [2020-10-13 10:51:39,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:39" (1/1) ... [2020-10-13 10:51:39,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:51:39,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:51:39,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:51:39,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:51:39,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:39" (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 [2020-10-13 10:51:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:51:39,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:51:39,196 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:51:39,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:51:39,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:51:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:51:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:51:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:51:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:51:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:51:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:51:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:51:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:51:39,365 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:51:39,366 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:51:39,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:39 BoogieIcfgContainer [2020-10-13 10:51:39,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:51:39,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:51:39,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:51:39,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:51:39,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:51:38" (1/3) ... [2020-10-13 10:51:39,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75645295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:39, skipping insertion in model container [2020-10-13 10:51:39,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:39" (2/3) ... [2020-10-13 10:51:39,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75645295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:39, skipping insertion in model container [2020-10-13 10:51:39,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:39" (3/3) ... [2020-10-13 10:51:39,379 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.i [2020-10-13 10:51:39,391 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:51:39,399 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:51:39,415 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:51:39,440 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:51:39,440 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:51:39,440 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:51:39,441 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:51:39,441 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:51:39,441 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:51:39,441 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:51:39,441 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:51:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 10:51:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:51:39,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:39,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:39,465 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash -64670033, now seen corresponding path program 1 times [2020-10-13 10:51:39,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:39,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620728698] [2020-10-13 10:51:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:39,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:39,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:51:39,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:39,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 10:51:39,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:39,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:39,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:39,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:51:39,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:51:39,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:39,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:39,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:39,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:39,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:51:39,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:39,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:39,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:39,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:39,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:39,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620728698] [2020-10-13 10:51:39,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:39,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:51:39,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879588368] [2020-10-13 10:51:39,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:51:39,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:39,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:51:39,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:51:39,737 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-13 10:51:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:39,785 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-10-13 10:51:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:51:39,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:51:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:39,797 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:51:39,797 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:51:39,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:51:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:51:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:51:39,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:51:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 10:51:39,845 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-13 10:51:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:39,846 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 10:51:39,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:51:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 10:51:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:51:39,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:39,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:39,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:51:39,848 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash -972579924, now seen corresponding path program 1 times [2020-10-13 10:51:39,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:39,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023525117] [2020-10-13 10:51:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:39,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:39,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:51:39,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:39,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-13 10:51:39,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:39,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:39,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:51:39,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:51:39,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:39,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:39,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:39,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:39,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:39,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:39,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:51:39,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:39,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:39,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:39,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:39,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:39,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023525117] [2020-10-13 10:51:39,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:39,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:51:39,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164216097] [2020-10-13 10:51:39,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:51:39,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:39,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:51:39,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:51:39,957 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-13 10:51:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:39,982 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-13 10:51:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:51:39,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-13 10:51:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:39,984 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:51:39,984 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:51:39,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:51:39,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:51:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:51:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:51:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 10:51:39,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-13 10:51:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:39,991 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 10:51:39,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:51:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 10:51:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:51:39,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:39,993 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:39,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:51:39,993 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:39,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:39,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1538365785, now seen corresponding path program 1 times [2020-10-13 10:51:39,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:39,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946217798] [2020-10-13 10:51:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:51:40,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:40,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-13 10:51:40,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:51:40,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:51:40,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:51:40,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:40,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:40,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:40,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:51:40,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:40,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:40,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:40,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:40,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946217798] [2020-10-13 10:51:40,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:40,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:51:40,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924319741] [2020-10-13 10:51:40,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:51:40,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:40,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:51:40,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:40,163 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 10:51:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:40,198 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-13 10:51:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:51:40,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:51:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:40,201 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:51:40,201 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:51:40,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:40,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:51:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-13 10:51:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:51:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-13 10:51:40,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-13 10:51:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:40,209 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-13 10:51:40,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:51:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-13 10:51:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:51:40,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:40,211 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:40,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:51:40,211 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:40,212 INFO L82 PathProgramCache]: Analyzing trace with hash 202268386, now seen corresponding path program 2 times [2020-10-13 10:51:40,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:40,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422235327] [2020-10-13 10:51:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:51:40,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:40,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-13 10:51:40,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:51:40,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:40,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:51:40,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:40,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:40,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:40,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:40,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:40,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:51:40,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422235327] [2020-10-13 10:51:40,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:40,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:51:40,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21550146] [2020-10-13 10:51:40,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:51:40,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:40,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:51:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:40,429 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-13 10:51:40,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:40,454 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:51:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:51:40,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 10:51:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:40,456 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:51:40,456 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:51:40,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:51:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 10:51:40,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:51:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 10:51:40,463 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-13 10:51:40,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:40,463 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 10:51:40,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:51:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 10:51:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:51:40,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:40,465 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:40,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:51:40,465 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:40,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:40,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1692511713, now seen corresponding path program 3 times [2020-10-13 10:51:40,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:40,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319459423] [2020-10-13 10:51:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:51:40,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:40,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-13 10:51:40,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:51:40,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:40,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:40,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:40,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:40,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:40,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:40,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:40,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:40,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:40,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-10-13 10:51:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:51:40,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319459423] [2020-10-13 10:51:40,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:40,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:51:40,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719911633] [2020-10-13 10:51:40,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:40,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:40,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:40,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:40,671 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-13 10:51:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:40,703 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-13 10:51:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:51:40,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 10:51:40,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:40,705 INFO L225 Difference]: With dead ends: 27 [2020-10-13 10:51:40,705 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:51:40,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:51:40,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-13 10:51:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:51:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-13 10:51:40,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-10-13 10:51:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:40,713 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-13 10:51:40,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-13 10:51:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:51:40,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:40,714 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:40,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:51:40,714 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:40,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:40,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1903080358, now seen corresponding path program 4 times [2020-10-13 10:51:40,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:40,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308867840] [2020-10-13 10:51:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:51:40,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:40,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-13 10:51:40,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:51:40,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:40,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:51:40,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:40,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:40,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:40,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:40,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:40,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:51:40,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:40,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:51:40,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308867840] [2020-10-13 10:51:40,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:40,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:51:40,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396928482] [2020-10-13 10:51:40,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:40,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:40,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:40,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:40,926 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-10-13 10:51:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:40,959 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-13 10:51:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:51:40,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 10:51:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:40,961 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:51:40,961 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:51:40,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:51:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 10:51:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:51:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 10:51:40,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 20 [2020-10-13 10:51:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:40,968 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 10:51:40,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 10:51:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:51:40,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:40,970 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:40,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:51:40,970 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:40,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1640716567, now seen corresponding path program 5 times [2020-10-13 10:51:40,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:40,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647952306] [2020-10-13 10:51:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:40,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:51:41,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:41,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-13 10:51:41,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:41,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:51:41,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:51:41,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:41,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:41,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:41,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:41,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:41,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:51:41,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647952306] [2020-10-13 10:51:41,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:41,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:51:41,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113175358] [2020-10-13 10:51:41,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:51:41,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:51:41,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:41,245 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-13 10:51:41,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:41,288 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-13 10:51:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:51:41,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 10:51:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:41,290 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:51:41,290 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:51:41,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:51:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 10:51:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:51:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-13 10:51:41,297 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2020-10-13 10:51:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:41,297 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-13 10:51:41,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:51:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-13 10:51:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:51:41,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:41,298 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:41,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:51:41,299 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:41,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1578661202, now seen corresponding path program 6 times [2020-10-13 10:51:41,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:41,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255409588] [2020-10-13 10:51:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:51:41,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:41,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-13 10:51:41,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:51:41,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:41,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:41,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:41,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:41,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:41,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:51:41,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255409588] [2020-10-13 10:51:41,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:41,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:51:41,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297496127] [2020-10-13 10:51:41,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:51:41,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:51:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:41,563 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-13 10:51:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:41,603 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-10-13 10:51:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:51:41,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 10:51:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:41,604 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:51:41,605 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:51:41,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:41,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:51:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:51:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:51:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 10:51:41,611 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 24 [2020-10-13 10:51:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:41,612 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 10:51:41,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:51:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 10:51:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:51:41,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:41,613 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:41,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:51:41,614 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:41,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1210852465, now seen corresponding path program 7 times [2020-10-13 10:51:41,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:41,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652479919] [2020-10-13 10:51:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:51:41,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:41,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-13 10:51:41,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:41,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:51:41,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:51:41,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:41,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:41,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:41,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:41,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:41,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:41,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:41,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:51:41,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652479919] [2020-10-13 10:51:41,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:41,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:51:41,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548196025] [2020-10-13 10:51:41,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:51:41,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:41,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:51:41,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:41,921 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-10-13 10:51:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:41,959 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-13 10:51:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:41,960 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 10:51:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:41,961 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:51:41,961 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 10:51:41,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 10:51:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 10:51:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:51:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-13 10:51:41,967 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 26 [2020-10-13 10:51:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:41,967 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-13 10:51:41,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:51:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-13 10:51:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:51:41,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:41,968 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:41,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:51:41,969 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:41,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:41,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1409956298, now seen corresponding path program 8 times [2020-10-13 10:51:41,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:41,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275554216] [2020-10-13 10:51:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:51:42,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:42,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-13 10:51:42,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:42,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:42,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:51:42,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:42,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:42,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:42,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:42,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:51:42,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275554216] [2020-10-13 10:51:42,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:42,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:51:42,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731430242] [2020-10-13 10:51:42,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:51:42,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:51:42,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:42,254 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2020-10-13 10:51:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:42,285 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-10-13 10:51:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:42,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 10:51:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:42,286 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:51:42,287 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:51:42,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:51:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 10:51:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:51:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 10:51:42,292 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 28 [2020-10-13 10:51:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:42,292 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 10:51:42,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:51:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 10:51:42,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:51:42,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:42,294 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:42,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:51:42,294 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:42,294 INFO L82 PathProgramCache]: Analyzing trace with hash -117556857, now seen corresponding path program 9 times [2020-10-13 10:51:42,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:42,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339250875] [2020-10-13 10:51:42,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:51:42,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:42,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-13 10:51:42,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:51:42,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:51:42,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:51:42,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:42,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:42,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:42,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:42,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 10:51:42,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339250875] [2020-10-13 10:51:42,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:42,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:51:42,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794293039] [2020-10-13 10:51:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:51:42,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:51:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:42,660 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 8 states. [2020-10-13 10:51:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:42,705 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-13 10:51:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:51:42,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:51:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:42,706 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:51:42,706 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 10:51:42,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 10:51:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 10:51:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:51:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-13 10:51:42,712 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 30 [2020-10-13 10:51:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:42,712 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-13 10:51:42,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:51:42,713 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-13 10:51:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:51:42,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:42,714 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:42,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:51:42,714 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:42,715 INFO L82 PathProgramCache]: Analyzing trace with hash -199951934, now seen corresponding path program 10 times [2020-10-13 10:51:42,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:42,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406574] [2020-10-13 10:51:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:51:43,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:43,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-13 10:51:43,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:51:43,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:43,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:51:43,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:43,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:43,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:43,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:43,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:43,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 10:51:43,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406574] [2020-10-13 10:51:43,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:43,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:51:43,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771988163] [2020-10-13 10:51:43,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:51:43,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:43,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:51:43,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:43,165 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2020-10-13 10:51:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:43,221 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-13 10:51:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:51:43,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 10:51:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:43,223 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:51:43,223 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:51:43,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:51:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 10:51:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:51:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-13 10:51:43,236 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2020-10-13 10:51:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:43,236 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-13 10:51:43,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:51:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-13 10:51:43,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:51:43,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:43,242 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:43,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:51:43,243 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:43,244 INFO L82 PathProgramCache]: Analyzing trace with hash -78064897, now seen corresponding path program 11 times [2020-10-13 10:51:43,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:43,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403049403] [2020-10-13 10:51:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:51:43,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-13 10:51:43,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:51:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:51:43,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:51:43,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:43,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:43,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:43,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:43,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:43,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:43,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:43,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:51:43,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403049403] [2020-10-13 10:51:43,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:43,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:51:43,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560066323] [2020-10-13 10:51:43,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:51:43,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:43,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:51:43,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:43,889 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 9 states. [2020-10-13 10:51:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:43,950 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-13 10:51:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:51:43,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-13 10:51:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:43,952 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:51:43,952 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:51:43,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:51:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 10:51:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:51:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-13 10:51:43,962 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 34 [2020-10-13 10:51:43,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:43,963 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-13 10:51:43,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:51:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-13 10:51:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:51:43,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:43,965 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:43,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:51:43,965 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:43,966 INFO L82 PathProgramCache]: Analyzing trace with hash -902884038, now seen corresponding path program 12 times [2020-10-13 10:51:43,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:43,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827233851] [2020-10-13 10:51:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:44,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:51:44,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:44,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-13 10:51:44,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:51:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:51:44,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:44,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:44,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:44,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:44,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:44,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:44,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:44,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:44,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:44,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:51:44,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827233851] [2020-10-13 10:51:44,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:44,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:51:44,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192925983] [2020-10-13 10:51:44,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:51:44,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:51:44,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:44,600 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 9 states. [2020-10-13 10:51:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:44,655 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2020-10-13 10:51:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:51:44,657 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 10:51:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:44,658 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:51:44,658 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:51:44,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:51:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 10:51:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:51:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-13 10:51:44,666 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 36 [2020-10-13 10:51:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:44,666 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-13 10:51:44,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:51:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-13 10:51:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:51:44,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:44,667 INFO L422 BasicCegarLoop]: trace histogram [14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:44,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:51:44,668 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1832519671, now seen corresponding path program 13 times [2020-10-13 10:51:44,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:44,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270471012] [2020-10-13 10:51:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:45,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:51:45,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:45,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-13 10:51:45,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:45,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:51:45,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:51:45,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:51:45,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:45,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:45,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:45,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:45,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:45,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:45,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:45,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:45,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:45,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:45,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 10:51:45,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270471012] [2020-10-13 10:51:45,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:45,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:51:45,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850985509] [2020-10-13 10:51:45,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:51:45,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:45,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:51:45,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:45,564 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2020-10-13 10:51:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:45,623 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-13 10:51:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:51:45,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 10:51:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:45,625 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:51:45,625 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:51:45,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:51:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 10:51:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:51:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-13 10:51:45,637 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 38 [2020-10-13 10:51:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:45,637 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-13 10:51:45,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:51:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-13 10:51:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:51:45,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:45,639 INFO L422 BasicCegarLoop]: trace histogram [15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:45,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:51:45,639 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:45,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:45,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1217850418, now seen corresponding path program 14 times [2020-10-13 10:51:45,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:45,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657964278] [2020-10-13 10:51:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:45,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:46,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:51:46,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:46,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-10-13 10:51:46,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:51:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:46,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:51:46,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:46,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:46,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:46,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:46,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:46,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:46,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 10:51:46,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657964278] [2020-10-13 10:51:46,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:46,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:51:46,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586915271] [2020-10-13 10:51:46,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:51:46,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:46,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:51:46,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:46,479 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 10 states. [2020-10-13 10:51:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:46,529 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-13 10:51:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:51:46,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 10:51:46,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:46,530 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:51:46,530 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:51:46,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:46,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:51:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 10:51:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:51:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-13 10:51:46,535 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 40 [2020-10-13 10:51:46,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:46,536 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-13 10:51:46,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:51:46,536 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-13 10:51:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:51:46,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:46,537 INFO L422 BasicCegarLoop]: trace histogram [16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:46,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:51:46,537 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:46,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:46,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1287636881, now seen corresponding path program 15 times [2020-10-13 10:51:46,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:46,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092574060] [2020-10-13 10:51:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:46,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:47,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:51:47,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:47,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-13 10:51:47,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:47,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:51:47,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 10:51:47,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:51:47,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:47,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:47,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:47,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:47,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:47,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:47,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:47,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:47,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:47,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:47,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 64 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 10:51:47,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092574060] [2020-10-13 10:51:47,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:47,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:51:47,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294784080] [2020-10-13 10:51:47,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:51:47,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:47,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:51:47,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:47,382 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 11 states. [2020-10-13 10:51:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:47,455 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-13 10:51:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:51:47,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-13 10:51:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:47,457 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:51:47,457 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:51:47,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:51:47,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 10:51:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:51:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-13 10:51:47,467 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 42 [2020-10-13 10:51:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:47,467 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-13 10:51:47,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:51:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-13 10:51:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:51:47,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:47,471 INFO L422 BasicCegarLoop]: trace histogram [17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:47,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:51:47,471 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:47,472 INFO L82 PathProgramCache]: Analyzing trace with hash 634576554, now seen corresponding path program 16 times [2020-10-13 10:51:47,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:47,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548596843] [2020-10-13 10:51:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:47,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:48,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:51:48,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:48,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 708 [2020-10-13 10:51:48,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:48,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:51:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:51:48,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:48,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:48,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:48,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:48,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:48,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:48,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:48,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 10:51:48,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548596843] [2020-10-13 10:51:48,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:48,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:51:48,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349464821] [2020-10-13 10:51:48,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:51:48,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:48,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:51:48,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:48,284 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 11 states. [2020-10-13 10:51:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:48,332 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-10-13 10:51:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:51:48,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 10:51:48,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:48,333 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:51:48,333 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:51:48,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:51:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 10:51:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:51:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-13 10:51:48,338 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 44 [2020-10-13 10:51:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:48,339 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-13 10:51:48,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:51:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-13 10:51:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:51:48,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:48,340 INFO L422 BasicCegarLoop]: trace histogram [18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:48,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:51:48,340 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:48,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1179763815, now seen corresponding path program 17 times [2020-10-13 10:51:48,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:48,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818643445] [2020-10-13 10:51:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:48,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:49,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:49,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:51:49,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:49,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-13 10:51:49,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:51:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 10:51:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:51:49,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:49,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:49,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:49,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:49,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:49,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:49,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:49,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:49,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:49,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 10:51:49,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818643445] [2020-10-13 10:51:49,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:49,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:51:49,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181053946] [2020-10-13 10:51:49,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:51:49,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:49,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:51:49,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:49,309 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 12 states. [2020-10-13 10:51:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:49,374 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-10-13 10:51:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:51:49,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 10:51:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:49,376 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:51:49,376 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:51:49,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:49,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:51:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-13 10:51:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:51:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-13 10:51:49,381 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 46 [2020-10-13 10:51:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:49,381 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-13 10:51:49,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:51:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-13 10:51:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:51:49,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:49,382 INFO L422 BasicCegarLoop]: trace histogram [19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:49,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:51:49,383 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash 984698018, now seen corresponding path program 18 times [2020-10-13 10:51:49,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:49,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011200353] [2020-10-13 10:51:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:49,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:49,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:50,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:51:50,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:50,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-13 10:51:50,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:50,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:51:50,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:50,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:51:50,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:50,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:50,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:50,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:50,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:50,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:50,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:50,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:50,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:50,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:50,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 90 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 10:51:50,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011200353] [2020-10-13 10:51:50,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:50,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:51:50,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667921340] [2020-10-13 10:51:50,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:51:50,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:50,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:51:50,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:50,249 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 12 states. [2020-10-13 10:51:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:50,298 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2020-10-13 10:51:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:51:50,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-13 10:51:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:50,300 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:51:50,300 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 10:51:50,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 10:51:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 10:51:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:51:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-13 10:51:50,305 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 48 [2020-10-13 10:51:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:50,305 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-13 10:51:50,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:51:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-13 10:51:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:51:50,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:50,306 INFO L422 BasicCegarLoop]: trace histogram [20, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:50,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:51:50,306 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:50,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1851978785, now seen corresponding path program 19 times [2020-10-13 10:51:50,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:50,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578032808] [2020-10-13 10:51:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:50,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:51,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:51,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:51:51,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:51,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 901 [2020-10-13 10:51:51,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:51,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:51:51,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 10:51:51,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:51:51,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:51,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:51,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:51,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:51,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:51,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:51,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:51,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:51,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 100 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 10:51:51,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578032808] [2020-10-13 10:51:51,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:51,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:51:51,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728500010] [2020-10-13 10:51:51,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:51:51,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:51:51,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:51,342 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 13 states. [2020-10-13 10:51:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:51,415 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-10-13 10:51:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:51:51,416 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-13 10:51:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:51,417 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:51:51,417 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:51:51,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:51:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 10:51:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:51:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-13 10:51:51,425 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 50 [2020-10-13 10:51:51,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:51,428 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-13 10:51:51,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:51:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-13 10:51:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:51:51,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:51,429 INFO L422 BasicCegarLoop]: trace histogram [21, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:51,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:51:51,430 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:51,430 INFO L82 PathProgramCache]: Analyzing trace with hash -532113894, now seen corresponding path program 20 times [2020-10-13 10:51:51,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:51,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773393783] [2020-10-13 10:51:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:51,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:51,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:52,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:51:52,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:52,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1234 [2020-10-13 10:51:52,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:52,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:51:52,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:52,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:51:52,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:52,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:52,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:52,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:52,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:52,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:52,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:52,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:52,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:52,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:52,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 110 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 10:51:52,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773393783] [2020-10-13 10:51:52,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:52,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:51:52,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404636702] [2020-10-13 10:51:52,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:51:52,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:52,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:51:52,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:52,821 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 13 states. [2020-10-13 10:51:52,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:52,879 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-10-13 10:51:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:51:52,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-13 10:51:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:52,880 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:51:52,880 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:51:52,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:51:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 10:51:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:51:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-13 10:51:52,885 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 52 [2020-10-13 10:51:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:52,885 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-13 10:51:52,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:51:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-13 10:51:52,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:51:52,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:52,887 INFO L422 BasicCegarLoop]: trace histogram [22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:52,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:51:52,888 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:52,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:52,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1352167127, now seen corresponding path program 21 times [2020-10-13 10:51:52,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:52,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225866989] [2020-10-13 10:51:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:52,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:54,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:51:54,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:54,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1486 [2020-10-13 10:51:54,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:51:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 10:51:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:51:54,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:54,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:54,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:54,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:54,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:54,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:54,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:54,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:54,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:54,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:54,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 121 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-13 10:51:54,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225866989] [2020-10-13 10:51:54,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:54,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:51:54,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761216589] [2020-10-13 10:51:54,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:51:54,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:54,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:51:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:51:54,507 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 14 states. [2020-10-13 10:51:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:54,582 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-13 10:51:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:51:54,582 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 10:51:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:54,583 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:51:54,583 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 10:51:54,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:51:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 10:51:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-13 10:51:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:51:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-10-13 10:51:54,588 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 54 [2020-10-13 10:51:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:54,589 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-10-13 10:51:54,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:51:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-10-13 10:51:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:51:54,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:54,590 INFO L422 BasicCegarLoop]: trace histogram [23, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:54,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:51:54,590 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:54,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash -839443694, now seen corresponding path program 22 times [2020-10-13 10:51:54,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:54,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494491509] [2020-10-13 10:51:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:54,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:55,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:55,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:51:55,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:55,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-13 10:51:55,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:55,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:51:55,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:55,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:51:55,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:56,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:56,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:56,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:56,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:56,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:56,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:56,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:56,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:56,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:56,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:56,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 132 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 10:51:56,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494491509] [2020-10-13 10:51:56,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:56,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:51:56,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447446506] [2020-10-13 10:51:56,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:51:56,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:56,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:51:56,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:51:56,028 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 14 states. [2020-10-13 10:51:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:56,111 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2020-10-13 10:51:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:51:56,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-13 10:51:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:56,113 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:51:56,113 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:51:56,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:51:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:51:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 10:51:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:51:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-13 10:51:56,118 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 56 [2020-10-13 10:51:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:56,118 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-13 10:51:56,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:51:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-13 10:51:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:51:56,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:56,119 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:56,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:51:56,120 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:56,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:56,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1828867407, now seen corresponding path program 23 times [2020-10-13 10:51:56,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:56,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876487954] [2020-10-13 10:51:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:56,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:56,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:57,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:51:57,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:57,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1683 [2020-10-13 10:51:57,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:57,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:51:57,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 10:51:57,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:51:57,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:57,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:57,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:57,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:57,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:57,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:57,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:57,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:57,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 144 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-13 10:51:57,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876487954] [2020-10-13 10:51:57,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:57,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:51:57,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612115987] [2020-10-13 10:51:57,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:51:57,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:57,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:51:57,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:57,991 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 15 states. [2020-10-13 10:51:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:58,061 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-10-13 10:51:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:51:58,061 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-13 10:51:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:58,062 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:51:58,062 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:51:58,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:51:58,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-13 10:51:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:51:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-13 10:51:58,066 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 58 [2020-10-13 10:51:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:58,068 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-13 10:51:58,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:51:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-13 10:51:58,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:51:58,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:58,069 INFO L422 BasicCegarLoop]: trace histogram [25, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:58,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:51:58,069 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2002992010, now seen corresponding path program 24 times [2020-10-13 10:51:58,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:58,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616245439] [2020-10-13 10:51:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:58,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:58,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:59,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:51:59,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:59,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1595 [2020-10-13 10:51:59,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:59,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:51:59,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:51:59,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:59,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:59,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:59,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:59,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:59,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:59,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:59,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:59,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:59,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:59,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 156 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 10:51:59,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616245439] [2020-10-13 10:51:59,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:59,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:51:59,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860526975] [2020-10-13 10:51:59,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:51:59,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:51:59,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:59,809 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 15 states. [2020-10-13 10:51:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:59,857 INFO L93 Difference]: Finished difference Result 95 states and 122 transitions. [2020-10-13 10:51:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:51:59,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-13 10:51:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:59,858 INFO L225 Difference]: With dead ends: 95 [2020-10-13 10:51:59,859 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:51:59,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:59,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:51:59,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-13 10:51:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:51:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-13 10:51:59,864 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 60 [2020-10-13 10:51:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:59,864 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-13 10:51:59,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:51:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-13 10:51:59,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:51:59,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:59,866 INFO L422 BasicCegarLoop]: trace histogram [26, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:59,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:51:59,866 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:59,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1558251335, now seen corresponding path program 25 times [2020-10-13 10:51:59,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:59,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100187639] [2020-10-13 10:51:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:00,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:00,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:52:00,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:00,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-10-13 10:52:00,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:00,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:52:00,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 10:52:00,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:52:00,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:01,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:01,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:01,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:01,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:01,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:01,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:01,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:01,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:01,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:01,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:01,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 169 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-13 10:52:01,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100187639] [2020-10-13 10:52:01,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:01,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:52:01,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125388696] [2020-10-13 10:52:01,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:52:01,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:01,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:52:01,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:52:01,014 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 16 states. [2020-10-13 10:52:01,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:01,093 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-13 10:52:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:52:01,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-13 10:52:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:01,095 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:52:01,095 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:52:01,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:52:01,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:52:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-13 10:52:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:52:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2020-10-13 10:52:01,100 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 62 [2020-10-13 10:52:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:01,100 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2020-10-13 10:52:01,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:52:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2020-10-13 10:52:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:52:01,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:01,101 INFO L422 BasicCegarLoop]: trace histogram [27, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:01,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:52:01,101 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash -361015422, now seen corresponding path program 26 times [2020-10-13 10:52:01,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:01,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854269959] [2020-10-13 10:52:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:01,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:01,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:02,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:52:02,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:02,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-13 10:52:02,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:02,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:52:02,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:02,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:52:02,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:02,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:02,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:02,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:02,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:02,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:02,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:02,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:02,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 182 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 10:52:02,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854269959] [2020-10-13 10:52:02,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:02,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:52:02,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574719610] [2020-10-13 10:52:02,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:52:02,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:02,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:52:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:52:02,276 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand 16 states. [2020-10-13 10:52:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:02,334 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-10-13 10:52:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:52:02,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-13 10:52:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:02,336 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:52:02,336 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:52:02,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:52:02,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:52:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 10:52:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:52:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2020-10-13 10:52:02,344 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 64 [2020-10-13 10:52:02,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:02,345 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2020-10-13 10:52:02,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:52:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2020-10-13 10:52:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:52:02,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:02,346 INFO L422 BasicCegarLoop]: trace histogram [28, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:02,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:52:02,346 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:02,347 INFO L82 PathProgramCache]: Analyzing trace with hash 8584383, now seen corresponding path program 27 times [2020-10-13 10:52:02,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:02,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535608037] [2020-10-13 10:52:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:02,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:04,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:04,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:52:04,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1769 [2020-10-13 10:52:04,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:52:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 10:52:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:52:04,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:04,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:04,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:04,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:04,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:04,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:04,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:04,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:04,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:04,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:04,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:04,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 196 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 10:52:04,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535608037] [2020-10-13 10:52:04,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:04,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:52:04,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835224207] [2020-10-13 10:52:04,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:52:04,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:04,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:52:04,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:52:04,301 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 17 states. [2020-10-13 10:52:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:04,381 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-10-13 10:52:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:52:04,381 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-10-13 10:52:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:04,382 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:52:04,382 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 10:52:04,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:52:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 10:52:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-13 10:52:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:52:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-10-13 10:52:04,389 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 66 [2020-10-13 10:52:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:04,389 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-10-13 10:52:04,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:52:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-10-13 10:52:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:52:04,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:04,390 INFO L422 BasicCegarLoop]: trace histogram [29, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:04,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:52:04,390 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:04,391 INFO L82 PathProgramCache]: Analyzing trace with hash 762695418, now seen corresponding path program 28 times [2020-10-13 10:52:04,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:04,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845662856] [2020-10-13 10:52:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:04,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:04,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:05,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:05,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:52:05,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:05,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 896 [2020-10-13 10:52:05,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:52:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:52:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:05,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:05,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:05,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:05,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:05,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:05,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:05,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:05,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:05,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 210 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 10:52:05,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845662856] [2020-10-13 10:52:05,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:05,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:52:05,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000459027] [2020-10-13 10:52:05,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:52:05,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:52:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:52:05,482 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 17 states. [2020-10-13 10:52:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:05,547 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2020-10-13 10:52:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:52:05,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-13 10:52:05,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:05,549 INFO L225 Difference]: With dead ends: 107 [2020-10-13 10:52:05,549 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:52:05,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:52:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:52:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 10:52:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 10:52:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-10-13 10:52:05,554 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 68 [2020-10-13 10:52:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:05,554 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-10-13 10:52:05,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:52:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-10-13 10:52:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:52:05,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:05,555 INFO L422 BasicCegarLoop]: trace histogram [30, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:05,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:52:05,556 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:05,556 INFO L82 PathProgramCache]: Analyzing trace with hash 8293815, now seen corresponding path program 29 times [2020-10-13 10:52:05,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:05,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708197650] [2020-10-13 10:52:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:05,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:05,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:07,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:52:07,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:07,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2163 [2020-10-13 10:52:07,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:07,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:52:07,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 10:52:07,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:52:07,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:07,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:07,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:07,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:07,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:07,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:07,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:07,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 225 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 10:52:07,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708197650] [2020-10-13 10:52:07,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:07,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:52:07,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308713202] [2020-10-13 10:52:07,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:52:07,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:07,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:52:07,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:52:07,960 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 18 states. [2020-10-13 10:52:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:08,069 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-10-13 10:52:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:52:08,071 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-13 10:52:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:08,072 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:52:08,072 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:52:08,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:52:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:52:08,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 10:52:08,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:52:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-13 10:52:08,077 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 70 [2020-10-13 10:52:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:08,077 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-13 10:52:08,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:52:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-13 10:52:08,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:52:08,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:08,079 INFO L422 BasicCegarLoop]: trace histogram [31, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:08,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:52:08,080 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:08,081 INFO L82 PathProgramCache]: Analyzing trace with hash 483459570, now seen corresponding path program 30 times [2020-10-13 10:52:08,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:08,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75849384] [2020-10-13 10:52:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:08,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:08,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:09,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:52:09,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:09,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1321 [2020-10-13 10:52:09,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:09,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:52:09,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:09,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:52:09,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:09,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:09,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:09,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:09,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:09,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:52:09,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:09,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:09,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:09,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:09,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 240 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 10:52:09,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75849384] [2020-10-13 10:52:09,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:09,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:52:09,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251775614] [2020-10-13 10:52:09,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:52:09,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:52:09,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:52:09,617 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 18 states. [2020-10-13 10:52:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:09,689 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2020-10-13 10:52:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:52:09,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-13 10:52:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:09,690 INFO L225 Difference]: With dead ends: 113 [2020-10-13 10:52:09,690 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 10:52:09,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:52:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 10:52:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-13 10:52:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:52:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-10-13 10:52:09,695 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 72 [2020-10-13 10:52:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:09,695 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-10-13 10:52:09,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:52:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-10-13 10:52:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:52:09,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:09,696 INFO L422 BasicCegarLoop]: trace histogram [32, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:09,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:52:09,697 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:09,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:09,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1414391249, now seen corresponding path program 31 times [2020-10-13 10:52:09,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:09,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669075092] [2020-10-13 10:52:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:09,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:11,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:11,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:52:11,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:11,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1869 [2020-10-13 10:52:11,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:11,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:52:11,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 10:52:11,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:52:11,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:11,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:11,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:11,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:11,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:11,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:11,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:11,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:11,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:11,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:11,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:11,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 256 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-13 10:52:11,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669075092] [2020-10-13 10:52:11,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:11,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:52:11,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676525638] [2020-10-13 10:52:11,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:52:11,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:11,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:52:11,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:52:11,790 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 19 states. [2020-10-13 10:52:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:11,886 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2020-10-13 10:52:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:52:11,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2020-10-13 10:52:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:11,888 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:52:11,888 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:52:11,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:52:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:52:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 10:52:11,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:52:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2020-10-13 10:52:11,898 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 74 [2020-10-13 10:52:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:11,898 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2020-10-13 10:52:11,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:52:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2020-10-13 10:52:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:52:11,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:11,900 INFO L422 BasicCegarLoop]: trace histogram [33, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:11,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:52:11,900 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:11,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:11,900 INFO L82 PathProgramCache]: Analyzing trace with hash -917286806, now seen corresponding path program 32 times [2020-10-13 10:52:11,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:11,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141688895] [2020-10-13 10:52:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:11,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:12,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:12,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:12,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 10:52:12,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:12,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-13 10:52:12,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:12,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:52:12,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:12,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:52:12,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:13,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:13,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:13,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:13,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:13,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:13,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:13,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 272 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 10:52:13,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141688895] [2020-10-13 10:52:13,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:13,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:52:13,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925943456] [2020-10-13 10:52:13,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:52:13,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:13,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:52:13,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:52:13,097 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 19 states. [2020-10-13 10:52:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:13,183 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2020-10-13 10:52:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:52:13,184 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2020-10-13 10:52:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:13,185 INFO L225 Difference]: With dead ends: 119 [2020-10-13 10:52:13,185 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 10:52:13,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:52:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 10:52:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 10:52:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:52:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2020-10-13 10:52:13,189 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 76 [2020-10-13 10:52:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:13,189 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2020-10-13 10:52:13,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:52:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2020-10-13 10:52:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 10:52:13,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:13,191 INFO L422 BasicCegarLoop]: trace histogram [34, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:13,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:52:13,191 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:13,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1430520359, now seen corresponding path program 33 times [2020-10-13 10:52:13,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:13,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610429241] [2020-10-13 10:52:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:13,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:13,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:14,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:14,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:52:14,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:14,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-13 10:52:14,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:52:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:52:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:52:14,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:14,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:14,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:14,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:14,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:14,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:14,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:14,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:14,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:14,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:14,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:14,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 289 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-13 10:52:14,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610429241] [2020-10-13 10:52:14,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:14,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:52:14,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647810375] [2020-10-13 10:52:14,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:52:14,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:14,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:52:14,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:52:14,677 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 20 states. [2020-10-13 10:52:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:14,782 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-13 10:52:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:52:14,782 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2020-10-13 10:52:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:14,783 INFO L225 Difference]: With dead ends: 87 [2020-10-13 10:52:14,783 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:52:14,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:52:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:52:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-13 10:52:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:52:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2020-10-13 10:52:14,787 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 78 [2020-10-13 10:52:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:14,788 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2020-10-13 10:52:14,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:52:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2020-10-13 10:52:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 10:52:14,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:14,789 INFO L422 BasicCegarLoop]: trace histogram [35, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:14,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:52:14,789 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:14,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:14,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1443568226, now seen corresponding path program 34 times [2020-10-13 10:52:14,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:14,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678547654] [2020-10-13 10:52:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:14,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:14,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:16,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:16,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:52:16,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:16,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1413 [2020-10-13 10:52:16,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:16,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:52:16,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:16,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:52:16,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:16,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:16,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:16,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:16,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:16,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:16,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:16,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:16,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:16,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:16,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:16,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 306 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 10:52:16,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678547654] [2020-10-13 10:52:16,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:16,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:52:16,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911458099] [2020-10-13 10:52:16,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:52:16,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:16,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:52:16,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:52:16,413 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 20 states. [2020-10-13 10:52:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:16,494 INFO L93 Difference]: Finished difference Result 125 states and 162 transitions. [2020-10-13 10:52:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:52:16,494 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-13 10:52:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:16,495 INFO L225 Difference]: With dead ends: 125 [2020-10-13 10:52:16,495 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 10:52:16,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:52:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 10:52:16,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 10:52:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 10:52:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-10-13 10:52:16,501 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 80 [2020-10-13 10:52:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:16,502 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-10-13 10:52:16,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:52:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-10-13 10:52:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 10:52:16,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:16,504 INFO L422 BasicCegarLoop]: trace histogram [36, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:16,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:52:16,505 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:16,505 INFO L82 PathProgramCache]: Analyzing trace with hash 849520031, now seen corresponding path program 35 times [2020-10-13 10:52:16,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:16,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273595142] [2020-10-13 10:52:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:16,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:16,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:19,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:19,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 10:52:19,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:19,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2621 [2020-10-13 10:52:19,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:52:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 10:52:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:52:19,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:19,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:19,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:19,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:19,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:19,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:19,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:19,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:19,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:19,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:19,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:19,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 324 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-13 10:52:19,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273595142] [2020-10-13 10:52:19,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:19,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:52:19,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308473708] [2020-10-13 10:52:19,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:52:19,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:52:19,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:52:19,391 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 21 states. [2020-10-13 10:52:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:19,505 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2020-10-13 10:52:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:52:19,505 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2020-10-13 10:52:19,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:19,506 INFO L225 Difference]: With dead ends: 91 [2020-10-13 10:52:19,506 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 10:52:19,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:52:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 10:52:19,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-13 10:52:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 10:52:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2020-10-13 10:52:19,511 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 82 [2020-10-13 10:52:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:19,511 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2020-10-13 10:52:19,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:52:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2020-10-13 10:52:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 10:52:19,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:19,512 INFO L422 BasicCegarLoop]: trace histogram [37, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:19,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:52:19,513 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:19,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:19,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1448001498, now seen corresponding path program 36 times [2020-10-13 10:52:19,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:19,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319632541] [2020-10-13 10:52:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:19,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:19,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:21,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 10:52:21,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:21,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1649 [2020-10-13 10:52:21,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:21,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:52:21,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:21,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:52:21,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:21,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:21,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:21,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:21,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:21,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:21,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:21,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 342 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 10:52:21,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319632541] [2020-10-13 10:52:21,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:21,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:52:21,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633211998] [2020-10-13 10:52:21,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:52:21,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:21,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:52:21,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:52:21,409 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 21 states. [2020-10-13 10:52:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:21,473 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2020-10-13 10:52:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:52:21,473 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-13 10:52:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:21,474 INFO L225 Difference]: With dead ends: 131 [2020-10-13 10:52:21,474 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:52:21,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:52:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:52:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-13 10:52:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 10:52:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2020-10-13 10:52:21,479 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 84 [2020-10-13 10:52:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:21,479 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2020-10-13 10:52:21,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:52:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2020-10-13 10:52:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 10:52:21,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:21,480 INFO L422 BasicCegarLoop]: trace histogram [38, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:21,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:52:21,480 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:21,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1182505833, now seen corresponding path program 37 times [2020-10-13 10:52:21,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:21,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965863959] [2020-10-13 10:52:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:21,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:23,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:23,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 10:52:23,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:23,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1775 [2020-10-13 10:52:23,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:23,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:52:23,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 10:52:23,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:52:23,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:23,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:23,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:23,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:23,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:23,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:23,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:23,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:23,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 361 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-13 10:52:23,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965863959] [2020-10-13 10:52:23,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:23,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:52:23,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923121772] [2020-10-13 10:52:23,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:52:23,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:52:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:52:23,540 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 22 states. [2020-10-13 10:52:23,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:23,650 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-10-13 10:52:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:52:23,651 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2020-10-13 10:52:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:23,652 INFO L225 Difference]: With dead ends: 95 [2020-10-13 10:52:23,652 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 10:52:23,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:52:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 10:52:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-13 10:52:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 10:52:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2020-10-13 10:52:23,659 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 86 [2020-10-13 10:52:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:23,660 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2020-10-13 10:52:23,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:52:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2020-10-13 10:52:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 10:52:23,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:23,661 INFO L422 BasicCegarLoop]: trace histogram [39, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:23,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:52:23,661 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:23,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:23,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1413701422, now seen corresponding path program 38 times [2020-10-13 10:52:23,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:23,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398965038] [2020-10-13 10:52:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:23,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:23,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:25,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:25,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 10:52:25,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:25,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1835 [2020-10-13 10:52:25,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:25,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:52:25,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:25,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:52:25,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:25,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:25,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:25,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:25,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:25,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:25,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:25,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:25,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:25,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:25,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:25,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 380 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 10:52:25,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398965038] [2020-10-13 10:52:25,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:25,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:52:25,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333950127] [2020-10-13 10:52:25,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:52:25,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:25,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:52:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:52:25,754 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand 22 states. [2020-10-13 10:52:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:25,837 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2020-10-13 10:52:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:52:25,838 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-10-13 10:52:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:25,839 INFO L225 Difference]: With dead ends: 137 [2020-10-13 10:52:25,839 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 10:52:25,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:52:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 10:52:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 10:52:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:52:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2020-10-13 10:52:25,845 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 88 [2020-10-13 10:52:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:25,846 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2020-10-13 10:52:25,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:52:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2020-10-13 10:52:25,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:52:25,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:25,847 INFO L422 BasicCegarLoop]: trace histogram [40, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:25,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:52:25,847 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:25,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:25,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2112331535, now seen corresponding path program 39 times [2020-10-13 10:52:25,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:25,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789828684] [2020-10-13 10:52:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:25,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:25,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:27,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 10:52:27,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:27,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2042 [2020-10-13 10:52:27,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:52:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 10:52:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:52:27,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:28,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:28,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:28,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:28,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:28,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:28,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:28,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:28,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 400 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-13 10:52:28,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789828684] [2020-10-13 10:52:28,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:28,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:52:28,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315123595] [2020-10-13 10:52:28,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:52:28,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:28,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:52:28,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:52:28,177 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand 23 states. [2020-10-13 10:52:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:28,294 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-10-13 10:52:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:52:28,295 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2020-10-13 10:52:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:28,296 INFO L225 Difference]: With dead ends: 99 [2020-10-13 10:52:28,297 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 10:52:28,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:52:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 10:52:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-13 10:52:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 10:52:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-10-13 10:52:28,302 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 90 [2020-10-13 10:52:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:28,302 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-10-13 10:52:28,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:52:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-10-13 10:52:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 10:52:28,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:28,304 INFO L422 BasicCegarLoop]: trace histogram [41, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:28,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:52:28,304 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:28,304 INFO L82 PathProgramCache]: Analyzing trace with hash -465887926, now seen corresponding path program 40 times [2020-10-13 10:52:28,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:28,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931694153] [2020-10-13 10:52:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:28,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:28,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:30,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:30,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 10:52:30,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:30,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2134 [2020-10-13 10:52:30,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:52:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:52:30,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:30,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:30,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:30,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:30,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:30,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:30,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:30,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:30,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:30,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:30,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 420 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 10:52:30,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931694153] [2020-10-13 10:52:30,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:30,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:52:30,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31977029] [2020-10-13 10:52:30,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:52:30,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:30,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:52:30,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:52:30,711 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 23 states. [2020-10-13 10:52:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:30,802 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2020-10-13 10:52:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:52:30,803 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2020-10-13 10:52:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:30,804 INFO L225 Difference]: With dead ends: 143 [2020-10-13 10:52:30,804 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 10:52:30,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:52:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 10:52:30,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-13 10:52:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 10:52:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2020-10-13 10:52:30,809 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 92 [2020-10-13 10:52:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:30,810 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2020-10-13 10:52:30,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:52:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2020-10-13 10:52:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 10:52:30,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:30,811 INFO L422 BasicCegarLoop]: trace histogram [42, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:30,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:52:30,811 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:30,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1877822201, now seen corresponding path program 41 times [2020-10-13 10:52:30,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:30,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685161197] [2020-10-13 10:52:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:30,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:30,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:33,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:52:33,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:33,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2197 [2020-10-13 10:52:33,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:33,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:52:33,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 10:52:33,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:52:33,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:33,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:33,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:33,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:33,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:33,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:33,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:33,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:33,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:33,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:33,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 441 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-13 10:52:33,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685161197] [2020-10-13 10:52:33,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:33,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:52:33,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969169118] [2020-10-13 10:52:33,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:52:33,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:33,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:52:33,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:52:33,318 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 24 states. [2020-10-13 10:52:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:33,445 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2020-10-13 10:52:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:52:33,446 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2020-10-13 10:52:33,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:33,446 INFO L225 Difference]: With dead ends: 103 [2020-10-13 10:52:33,447 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 10:52:33,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:52:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 10:52:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 10:52:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 10:52:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2020-10-13 10:52:33,452 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 94 [2020-10-13 10:52:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:33,452 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2020-10-13 10:52:33,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:52:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2020-10-13 10:52:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 10:52:33,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:33,453 INFO L422 BasicCegarLoop]: trace histogram [43, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:33,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:52:33,453 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:33,454 INFO L82 PathProgramCache]: Analyzing trace with hash 402167106, now seen corresponding path program 42 times [2020-10-13 10:52:33,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:33,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337197912] [2020-10-13 10:52:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:33,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:35,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:35,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 10:52:35,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:35,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2475 [2020-10-13 10:52:35,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:35,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:52:35,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:35,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:52:35,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:36,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:36,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:36,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:36,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:36,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:36,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:36,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:36,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:36,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:36,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:36,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 462 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 10:52:36,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337197912] [2020-10-13 10:52:36,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:36,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:52:36,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741051291] [2020-10-13 10:52:36,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:52:36,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:36,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:52:36,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:52:36,232 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand 24 states. [2020-10-13 10:52:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:36,316 INFO L93 Difference]: Finished difference Result 149 states and 194 transitions. [2020-10-13 10:52:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:52:36,316 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 96 [2020-10-13 10:52:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:36,317 INFO L225 Difference]: With dead ends: 149 [2020-10-13 10:52:36,317 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 10:52:36,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:52:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 10:52:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-13 10:52:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 10:52:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2020-10-13 10:52:36,322 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 96 [2020-10-13 10:52:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:36,322 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2020-10-13 10:52:36,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:52:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2020-10-13 10:52:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 10:52:36,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:36,323 INFO L422 BasicCegarLoop]: trace histogram [44, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:36,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:52:36,323 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:36,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1519650431, now seen corresponding path program 43 times [2020-10-13 10:52:36,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:36,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948019957] [2020-10-13 10:52:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:36,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:36,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:39,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 10:52:39,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:39,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2675 [2020-10-13 10:52:39,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:39,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:52:39,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 10:52:39,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:52:39,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:39,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:39,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:39,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:39,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:39,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:39,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:39,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:39,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:39,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:39,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 484 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-13 10:52:39,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948019957] [2020-10-13 10:52:39,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:39,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:52:39,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220322922] [2020-10-13 10:52:39,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:52:39,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:52:39,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:52:39,336 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand 25 states. [2020-10-13 10:52:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:39,470 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2020-10-13 10:52:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:52:39,470 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2020-10-13 10:52:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:39,471 INFO L225 Difference]: With dead ends: 107 [2020-10-13 10:52:39,471 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 10:52:39,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:52:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 10:52:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-13 10:52:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 10:52:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2020-10-13 10:52:39,477 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 98 [2020-10-13 10:52:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:39,477 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2020-10-13 10:52:39,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:52:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2020-10-13 10:52:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 10:52:39,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:39,478 INFO L422 BasicCegarLoop]: trace histogram [45, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:39,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:52:39,478 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:39,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1198221498, now seen corresponding path program 44 times [2020-10-13 10:52:39,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:39,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951412065] [2020-10-13 10:52:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:39,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:39,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:42,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:42,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 10:52:42,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:42,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2782 [2020-10-13 10:52:42,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:52:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:42,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:52:42,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:42,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:42,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:42,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:42,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:42,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:42,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:42,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:42,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:42,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 506 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 10:52:42,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951412065] [2020-10-13 10:52:42,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:42,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:52:42,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407405757] [2020-10-13 10:52:42,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:52:42,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:52:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:52:42,669 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand 25 states. [2020-10-13 10:52:42,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:42,770 INFO L93 Difference]: Finished difference Result 155 states and 202 transitions. [2020-10-13 10:52:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:52:42,771 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 100 [2020-10-13 10:52:42,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:42,772 INFO L225 Difference]: With dead ends: 155 [2020-10-13 10:52:42,772 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 10:52:42,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:52:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 10:52:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-13 10:52:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 10:52:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2020-10-13 10:52:42,781 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 100 [2020-10-13 10:52:42,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:42,781 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2020-10-13 10:52:42,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:52:42,781 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2020-10-13 10:52:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 10:52:42,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:42,782 INFO L422 BasicCegarLoop]: trace histogram [46, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:42,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:52:42,783 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:42,783 INFO L82 PathProgramCache]: Analyzing trace with hash 4322167, now seen corresponding path program 45 times [2020-10-13 10:52:42,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:42,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072749587] [2020-10-13 10:52:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:42,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:42,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 10:52:45,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:45,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3019 [2020-10-13 10:52:45,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:52:45,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 10:52:45,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:52:45,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:46,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:46,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:46,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:46,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:46,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:46,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:46,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 529 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-13 10:52:46,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072749587] [2020-10-13 10:52:46,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:46,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:52:46,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124810615] [2020-10-13 10:52:46,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:52:46,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:46,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:52:46,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:52:46,268 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 26 states. [2020-10-13 10:52:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:46,431 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2020-10-13 10:52:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:52:46,432 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 102 [2020-10-13 10:52:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:46,433 INFO L225 Difference]: With dead ends: 111 [2020-10-13 10:52:46,433 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 10:52:46,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:52:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 10:52:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-13 10:52:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:52:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2020-10-13 10:52:46,438 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 102 [2020-10-13 10:52:46,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:46,439 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2020-10-13 10:52:46,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:52:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2020-10-13 10:52:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 10:52:46,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:46,440 INFO L422 BasicCegarLoop]: trace histogram [47, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:46,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:52:46,440 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash 961673138, now seen corresponding path program 46 times [2020-10-13 10:52:46,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:46,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802915793] [2020-10-13 10:52:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:51,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:51,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 10:52:51,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:51,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:52:51,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:52:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:52:51,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:51,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:51,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:51,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:51,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:51,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:51,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:51,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:51,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:51,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:51,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:51,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 552 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 10:52:51,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802915793] [2020-10-13 10:52:51,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:51,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:52:51,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673108090] [2020-10-13 10:52:51,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:52:51,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:51,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:52:51,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:52:51,824 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand 26 states. [2020-10-13 10:52:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:51,915 INFO L93 Difference]: Finished difference Result 161 states and 210 transitions. [2020-10-13 10:52:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:52:51,916 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 104 [2020-10-13 10:52:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:51,917 INFO L225 Difference]: With dead ends: 161 [2020-10-13 10:52:51,917 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 10:52:51,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:52:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 10:52:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-13 10:52:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 10:52:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2020-10-13 10:52:51,922 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 104 [2020-10-13 10:52:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:51,922 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2020-10-13 10:52:51,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:52:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2020-10-13 10:52:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 10:52:51,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:51,923 INFO L422 BasicCegarLoop]: trace histogram [48, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:51,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:52:51,924 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:51,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:51,924 INFO L82 PathProgramCache]: Analyzing trace with hash 976935919, now seen corresponding path program 47 times [2020-10-13 10:52:51,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:51,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661214374] [2020-10-13 10:52:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:51,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:55,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:55,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 10:52:55,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:55,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3437 [2020-10-13 10:52:55,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:55,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:52:55,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 10:52:55,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:52:55,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:55,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:55,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:55,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:55,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:55,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:55,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:55,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:55,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:55,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:55,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 576 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-10-13 10:52:55,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661214374] [2020-10-13 10:52:55,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:55,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:52:55,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448219617] [2020-10-13 10:52:55,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:52:55,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:55,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:52:55,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:52:55,745 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand 27 states. [2020-10-13 10:52:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:55,900 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2020-10-13 10:52:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:52:55,900 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 106 [2020-10-13 10:52:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:55,901 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:52:55,901 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 10:52:55,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:52:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 10:52:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-13 10:52:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 10:52:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2020-10-13 10:52:55,910 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 106 [2020-10-13 10:52:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:55,911 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2020-10-13 10:52:55,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:52:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2020-10-13 10:52:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 10:52:55,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:55,912 INFO L422 BasicCegarLoop]: trace histogram [49, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:55,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:52:55,912 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:55,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash -659381718, now seen corresponding path program 48 times [2020-10-13 10:52:55,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:55,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344189444] [2020-10-13 10:52:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:55,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:56,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:59,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 10:52:59,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:52:59,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3728 [2020-10-13 10:52:59,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:59,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:52:59,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:59,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:52:59,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:00,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:00,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:00,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:00,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:00,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:00,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:00,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:00,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:00,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:00,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:00,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 10:53:00,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344189444] [2020-10-13 10:53:00,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:00,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:53:00,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079114035] [2020-10-13 10:53:00,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:53:00,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:00,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:53:00,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:53:00,035 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand 27 states. [2020-10-13 10:53:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:00,144 INFO L93 Difference]: Finished difference Result 167 states and 218 transitions. [2020-10-13 10:53:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:53:00,144 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 108 [2020-10-13 10:53:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:00,145 INFO L225 Difference]: With dead ends: 167 [2020-10-13 10:53:00,145 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 10:53:00,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:53:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 10:53:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-13 10:53:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 10:53:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2020-10-13 10:53:00,151 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 108 [2020-10-13 10:53:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:00,151 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2020-10-13 10:53:00,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:53:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2020-10-13 10:53:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 10:53:00,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:00,152 INFO L422 BasicCegarLoop]: trace histogram [50, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:00,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:53:00,153 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:00,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:00,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1243275289, now seen corresponding path program 49 times [2020-10-13 10:53:00,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:00,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335563317] [2020-10-13 10:53:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:00,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:00,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:05,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:05,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 10:53:05,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:05,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:53:05,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:05,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:53:05,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 10:53:05,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:53:05,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:05,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:05,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:05,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:05,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:05,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:05,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:05,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:05,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:05,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:05,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:05,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 625 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 10:53:05,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335563317] [2020-10-13 10:53:05,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:05,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:53:05,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58896742] [2020-10-13 10:53:05,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:53:05,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:05,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:53:05,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:53:05,549 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand 28 states. [2020-10-13 10:53:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:05,709 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2020-10-13 10:53:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:53:05,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 110 [2020-10-13 10:53:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:05,711 INFO L225 Difference]: With dead ends: 119 [2020-10-13 10:53:05,711 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 10:53:05,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:53:05,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 10:53:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-13 10:53:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 10:53:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 139 transitions. [2020-10-13 10:53:05,717 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 139 transitions. Word has length 110 [2020-10-13 10:53:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:05,717 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 139 transitions. [2020-10-13 10:53:05,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:53:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 139 transitions. [2020-10-13 10:53:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 10:53:05,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:05,718 INFO L422 BasicCegarLoop]: trace histogram [51, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:05,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:53:05,719 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash 316393506, now seen corresponding path program 50 times [2020-10-13 10:53:05,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:05,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744140134] [2020-10-13 10:53:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:05,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:05,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:09,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:09,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 10:53:09,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:09,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4115 [2020-10-13 10:53:09,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:09,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:53:09,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:09,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:53:09,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:10,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:10,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:10,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:10,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:10,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:10,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:10,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:10,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 650 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 10:53:10,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744140134] [2020-10-13 10:53:10,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:10,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:53:10,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664501386] [2020-10-13 10:53:10,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:53:10,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:10,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:53:10,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:53:10,239 INFO L87 Difference]: Start difference. First operand 113 states and 139 transitions. Second operand 28 states. [2020-10-13 10:53:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:10,342 INFO L93 Difference]: Finished difference Result 173 states and 226 transitions. [2020-10-13 10:53:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:53:10,342 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2020-10-13 10:53:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:10,344 INFO L225 Difference]: With dead ends: 173 [2020-10-13 10:53:10,344 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 10:53:10,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:53:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 10:53:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-13 10:53:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 10:53:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2020-10-13 10:53:10,350 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 112 [2020-10-13 10:53:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:10,350 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2020-10-13 10:53:10,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:53:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2020-10-13 10:53:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 10:53:10,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:10,351 INFO L422 BasicCegarLoop]: trace histogram [52, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:10,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:53:10,352 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:10,352 INFO L82 PathProgramCache]: Analyzing trace with hash -219209889, now seen corresponding path program 51 times [2020-10-13 10:53:10,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:10,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377314166] [2020-10-13 10:53:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:10,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:10,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:14,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:14,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 10:53:14,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:14,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4449 [2020-10-13 10:53:14,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:14,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:53:14,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-13 10:53:14,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:53:14,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:15,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:15,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:15,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:15,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:15,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:15,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:15,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:15,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:15,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:15,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 676 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-13 10:53:15,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377314166] [2020-10-13 10:53:15,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:15,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:53:15,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6721265] [2020-10-13 10:53:15,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:53:15,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:15,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:53:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:53:15,250 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand 29 states. [2020-10-13 10:53:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:15,399 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2020-10-13 10:53:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:53:15,400 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 114 [2020-10-13 10:53:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:15,402 INFO L225 Difference]: With dead ends: 123 [2020-10-13 10:53:15,402 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:53:15,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:53:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:53:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-13 10:53:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 10:53:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 144 transitions. [2020-10-13 10:53:15,408 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 144 transitions. Word has length 114 [2020-10-13 10:53:15,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:15,408 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 144 transitions. [2020-10-13 10:53:15,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:53:15,408 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 144 transitions. [2020-10-13 10:53:15,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 10:53:15,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:15,409 INFO L422 BasicCegarLoop]: trace histogram [53, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:15,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:53:15,409 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash 895732122, now seen corresponding path program 52 times [2020-10-13 10:53:15,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:15,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783336357] [2020-10-13 10:53:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:15,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:20,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 10:53:20,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:20,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4594 [2020-10-13 10:53:20,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:20,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:53:20,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:20,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:53:20,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:20,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:20,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:20,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:20,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:20,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:20,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:20,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 702 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 10:53:20,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783336357] [2020-10-13 10:53:20,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:20,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:53:20,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63397454] [2020-10-13 10:53:20,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:53:20,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:20,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:53:20,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:53:20,429 INFO L87 Difference]: Start difference. First operand 117 states and 144 transitions. Second operand 29 states. [2020-10-13 10:53:20,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:20,533 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-10-13 10:53:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:53:20,534 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 116 [2020-10-13 10:53:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:20,535 INFO L225 Difference]: With dead ends: 179 [2020-10-13 10:53:20,535 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:53:20,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:53:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:53:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-13 10:53:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 10:53:20,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2020-10-13 10:53:20,541 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 116 [2020-10-13 10:53:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:20,541 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2020-10-13 10:53:20,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:53:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2020-10-13 10:53:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 10:53:20,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:20,542 INFO L422 BasicCegarLoop]: trace histogram [54, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:20,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:53:20,543 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:20,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:20,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1588643241, now seen corresponding path program 53 times [2020-10-13 10:53:20,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:20,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618884423] [2020-10-13 10:53:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:20,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:25,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:25,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 10:53:25,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:25,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4949 [2020-10-13 10:53:25,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:53:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 10:53:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:53:25,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:25,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:25,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:25,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:25,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:25,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:25,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:25,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:25,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:25,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:25,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:25,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 729 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-10-13 10:53:25,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618884423] [2020-10-13 10:53:25,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:25,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:53:25,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706411622] [2020-10-13 10:53:25,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:53:25,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:25,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:53:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:53:25,958 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand 30 states. [2020-10-13 10:53:26,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:26,105 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2020-10-13 10:53:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:53:26,106 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 118 [2020-10-13 10:53:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:26,107 INFO L225 Difference]: With dead ends: 127 [2020-10-13 10:53:26,107 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 10:53:26,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:53:26,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 10:53:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-13 10:53:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 10:53:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2020-10-13 10:53:26,114 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 118 [2020-10-13 10:53:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:26,115 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2020-10-13 10:53:26,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:53:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2020-10-13 10:53:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 10:53:26,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:26,116 INFO L422 BasicCegarLoop]: trace histogram [55, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:26,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:53:26,116 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash -869726574, now seen corresponding path program 54 times [2020-10-13 10:53:26,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:26,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090599913] [2020-10-13 10:53:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:26,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:31,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:31,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 10:53:31,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:31,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:53:31,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:31,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:53:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:53:31,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:31,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:31,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:31,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:31,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:31,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:31,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:31,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:31,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:31,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:31,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:31,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 756 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 10:53:31,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090599913] [2020-10-13 10:53:31,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:31,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:53:31,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886425992] [2020-10-13 10:53:31,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:53:31,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:31,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:53:31,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:53:31,575 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand 30 states. [2020-10-13 10:53:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:31,675 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2020-10-13 10:53:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:53:31,679 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2020-10-13 10:53:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:31,681 INFO L225 Difference]: With dead ends: 185 [2020-10-13 10:53:31,681 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 10:53:31,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:53:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 10:53:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-13 10:53:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 10:53:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2020-10-13 10:53:31,688 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 120 [2020-10-13 10:53:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:31,688 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2020-10-13 10:53:31,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:53:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2020-10-13 10:53:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 10:53:31,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:31,689 INFO L422 BasicCegarLoop]: trace histogram [56, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:31,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:53:31,690 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:31,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2135150799, now seen corresponding path program 55 times [2020-10-13 10:53:31,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:31,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653345870] [2020-10-13 10:53:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:31,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:31,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:36,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:36,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 10:53:36,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:36,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 10:53:36,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:36,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:53:36,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 10:53:36,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:53:36,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:37,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:37,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:37,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:37,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:37,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:37,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:37,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:37,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:37,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:37,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 784 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2020-10-13 10:53:37,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653345870] [2020-10-13 10:53:37,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:37,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:53:37,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472680038] [2020-10-13 10:53:37,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:53:37,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:53:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:53:37,270 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand 31 states. [2020-10-13 10:53:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:37,434 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2020-10-13 10:53:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:53:37,436 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 122 [2020-10-13 10:53:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:37,438 INFO L225 Difference]: With dead ends: 131 [2020-10-13 10:53:37,438 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 10:53:37,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:53:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 10:53:37,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-13 10:53:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 10:53:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2020-10-13 10:53:37,443 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 122 [2020-10-13 10:53:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:37,443 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2020-10-13 10:53:37,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:53:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2020-10-13 10:53:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 10:53:37,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:37,445 INFO L422 BasicCegarLoop]: trace histogram [57, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:37,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:53:37,445 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash -11411702, now seen corresponding path program 56 times [2020-10-13 10:53:37,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:37,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467616194] [2020-10-13 10:53:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:37,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:42,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:42,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 10:53:42,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:42,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:53:42,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:42,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:53:42,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:42,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:53:42,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:42,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:42,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:42,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:42,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:42,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:42,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:42,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:42,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:42,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:42,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:42,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 812 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 10:53:42,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467616194] [2020-10-13 10:53:42,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:42,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:53:42,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192741967] [2020-10-13 10:53:42,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:53:42,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:42,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:53:42,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:53:42,954 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand 31 states. [2020-10-13 10:53:43,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:43,075 INFO L93 Difference]: Finished difference Result 191 states and 250 transitions. [2020-10-13 10:53:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:53:43,075 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 124 [2020-10-13 10:53:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:43,077 INFO L225 Difference]: With dead ends: 191 [2020-10-13 10:53:43,077 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 10:53:43,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:53:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 10:53:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-13 10:53:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 10:53:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 156 transitions. [2020-10-13 10:53:43,085 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 156 transitions. Word has length 124 [2020-10-13 10:53:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:43,085 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 156 transitions. [2020-10-13 10:53:43,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:53:43,086 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 156 transitions. [2020-10-13 10:53:43,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 10:53:43,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:43,086 INFO L422 BasicCegarLoop]: trace histogram [58, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:43,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:53:43,087 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:43,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:43,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1219280185, now seen corresponding path program 57 times [2020-10-13 10:53:43,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:43,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543609182] [2020-10-13 10:53:43,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:43,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:43,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:48,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:48,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 10:53:48,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:48,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:53:48,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:53:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-13 10:53:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:53:48,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:48,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:48,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:48,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:48,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:48,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:48,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:48,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 841 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-10-13 10:53:48,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543609182] [2020-10-13 10:53:48,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:48,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:53:48,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908234689] [2020-10-13 10:53:48,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:53:48,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:48,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:53:48,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:53:48,657 INFO L87 Difference]: Start difference. First operand 127 states and 156 transitions. Second operand 32 states. [2020-10-13 10:53:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:48,863 INFO L93 Difference]: Finished difference Result 135 states and 166 transitions. [2020-10-13 10:53:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:53:48,863 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-10-13 10:53:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:48,865 INFO L225 Difference]: With dead ends: 135 [2020-10-13 10:53:48,865 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 10:53:48,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:53:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 10:53:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-13 10:53:48,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 10:53:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 159 transitions. [2020-10-13 10:53:48,873 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 159 transitions. Word has length 126 [2020-10-13 10:53:48,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:48,874 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 159 transitions. [2020-10-13 10:53:48,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:53:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 159 transitions. [2020-10-13 10:53:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 10:53:48,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:48,875 INFO L422 BasicCegarLoop]: trace histogram [59, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:48,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:53:48,875 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:48,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:48,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1900851970, now seen corresponding path program 58 times [2020-10-13 10:53:48,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:48,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798812231] [2020-10-13 10:53:48,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:48,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:49,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:53,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:53,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 10:53:53,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:53,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:53:53,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:53:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:53:53,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:54,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:54,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:54,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:54,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:54,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:54,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:54,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:54,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:54,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:54,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:54,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1770 proven. 870 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 10:53:54,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798812231] [2020-10-13 10:53:54,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:54,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:53:54,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807320485] [2020-10-13 10:53:54,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:53:54,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:54,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:53:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:53:54,424 INFO L87 Difference]: Start difference. First operand 129 states and 159 transitions. Second operand 32 states. [2020-10-13 10:53:54,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:54,533 INFO L93 Difference]: Finished difference Result 197 states and 258 transitions. [2020-10-13 10:53:54,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:53:54,533 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2020-10-13 10:53:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:54,534 INFO L225 Difference]: With dead ends: 197 [2020-10-13 10:53:54,534 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 10:53:54,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:53:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 10:53:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-13 10:53:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 10:53:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2020-10-13 10:53:54,540 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 128 [2020-10-13 10:53:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:54,540 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2020-10-13 10:53:54,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:53:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2020-10-13 10:53:54,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 10:53:54,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:54,541 INFO L422 BasicCegarLoop]: trace histogram [60, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:54,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 10:53:54,542 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:54,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1102319553, now seen corresponding path program 59 times [2020-10-13 10:53:54,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:54,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009671243] [2020-10-13 10:53:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:54,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:54,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:59,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:59,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 10:53:59,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:53:59,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:53:59,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:53:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-13 10:53:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:53:59,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:00,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:00,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:00,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:00,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:00,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:00,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:00,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:00,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:00,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:00,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1830 proven. 900 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-10-13 10:54:00,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009671243] [2020-10-13 10:54:00,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:00,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:54:00,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480833416] [2020-10-13 10:54:00,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:54:00,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:00,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:54:00,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:54:00,111 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand 33 states. [2020-10-13 10:54:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:00,290 INFO L93 Difference]: Finished difference Result 139 states and 171 transitions. [2020-10-13 10:54:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:54:00,290 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2020-10-13 10:54:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:00,291 INFO L225 Difference]: With dead ends: 139 [2020-10-13 10:54:00,292 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 10:54:00,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:54:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 10:54:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-13 10:54:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 10:54:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 164 transitions. [2020-10-13 10:54:00,298 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 164 transitions. Word has length 130 [2020-10-13 10:54:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:00,299 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 164 transitions. [2020-10-13 10:54:00,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:54:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 164 transitions. [2020-10-13 10:54:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 10:54:00,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:00,300 INFO L422 BasicCegarLoop]: trace histogram [61, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:00,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 10:54:00,300 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1664097670, now seen corresponding path program 60 times [2020-10-13 10:54:00,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:00,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499198636] [2020-10-13 10:54:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:00,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:00,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:05,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 10:54:05,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:05,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:54:05,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:05,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:54:05,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:05,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:54:05,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:05,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:05,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:05,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:05,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:05,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:05,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:05,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:05,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:05,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:05,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1891 proven. 930 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 10:54:05,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499198636] [2020-10-13 10:54:05,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:05,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:54:05,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969340091] [2020-10-13 10:54:05,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:54:05,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:05,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:54:05,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:54:05,919 INFO L87 Difference]: Start difference. First operand 133 states and 164 transitions. Second operand 33 states. [2020-10-13 10:54:06,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:06,053 INFO L93 Difference]: Finished difference Result 203 states and 266 transitions. [2020-10-13 10:54:06,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:54:06,054 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 132 [2020-10-13 10:54:06,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:06,055 INFO L225 Difference]: With dead ends: 203 [2020-10-13 10:54:06,055 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 10:54:06,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:54:06,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 10:54:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-13 10:54:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 10:54:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 166 transitions. [2020-10-13 10:54:06,062 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 166 transitions. Word has length 132 [2020-10-13 10:54:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:06,062 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 166 transitions. [2020-10-13 10:54:06,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:54:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 166 transitions. [2020-10-13 10:54:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 10:54:06,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:06,063 INFO L422 BasicCegarLoop]: trace histogram [62, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:06,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 10:54:06,064 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:06,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1320928969, now seen corresponding path program 61 times [2020-10-13 10:54:06,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:06,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108668377] [2020-10-13 10:54:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:06,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:06,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:11,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 10:54:11,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:11,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:54:11,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:11,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:54:11,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-13 10:54:11,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:54:11,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:11,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:11,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:11,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:11,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:11,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:11,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:11,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:11,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:11,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:11,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1953 proven. 961 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2020-10-13 10:54:11,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108668377] [2020-10-13 10:54:11,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:11,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:54:11,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081741274] [2020-10-13 10:54:11,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:54:11,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:11,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:54:11,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:54:11,700 INFO L87 Difference]: Start difference. First operand 135 states and 166 transitions. Second operand 34 states. [2020-10-13 10:54:11,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:11,885 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2020-10-13 10:54:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:54:11,885 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 134 [2020-10-13 10:54:11,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:11,886 INFO L225 Difference]: With dead ends: 143 [2020-10-13 10:54:11,886 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 10:54:11,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:54:11,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 10:54:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-13 10:54:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 10:54:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 169 transitions. [2020-10-13 10:54:11,895 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 169 transitions. Word has length 134 [2020-10-13 10:54:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:11,895 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 169 transitions. [2020-10-13 10:54:11,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:54:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 169 transitions. [2020-10-13 10:54:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 10:54:11,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:11,898 INFO L422 BasicCegarLoop]: trace histogram [63, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:11,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 10:54:11,899 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:11,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1294348942, now seen corresponding path program 62 times [2020-10-13 10:54:11,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:11,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810145421] [2020-10-13 10:54:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:11,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:12,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:16,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:16,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 10:54:16,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:16,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:54:16,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:16,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:54:16,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:16,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:54:16,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:17,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:17,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:17,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:17,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:17,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:17,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:17,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:17,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:17,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:17,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:17,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2016 proven. 992 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-13 10:54:17,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810145421] [2020-10-13 10:54:17,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:17,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:54:17,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709651259] [2020-10-13 10:54:17,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:54:17,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:17,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:54:17,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:54:17,539 INFO L87 Difference]: Start difference. First operand 137 states and 169 transitions. Second operand 34 states. [2020-10-13 10:54:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:17,654 INFO L93 Difference]: Finished difference Result 209 states and 274 transitions. [2020-10-13 10:54:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:54:17,656 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-10-13 10:54:17,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:17,657 INFO L225 Difference]: With dead ends: 209 [2020-10-13 10:54:17,657 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 10:54:17,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:54:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 10:54:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-13 10:54:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 10:54:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2020-10-13 10:54:17,666 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 136 [2020-10-13 10:54:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:17,667 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2020-10-13 10:54:17,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:54:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2020-10-13 10:54:17,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 10:54:17,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:17,669 INFO L422 BasicCegarLoop]: trace histogram [64, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:17,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 10:54:17,669 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:17,669 INFO L82 PathProgramCache]: Analyzing trace with hash 865762735, now seen corresponding path program 63 times [2020-10-13 10:54:17,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:17,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788864372] [2020-10-13 10:54:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:17,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:17,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:22,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:22,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 10:54:22,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:22,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:54:22,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:54:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-13 10:54:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:54:22,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:23,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:23,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:23,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:23,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:23,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:23,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:23,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:23,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:23,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:23,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:23,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2080 proven. 1024 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-13 10:54:23,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788864372] [2020-10-13 10:54:23,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:23,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:54:23,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238474832] [2020-10-13 10:54:23,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:54:23,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:23,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:54:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:54:23,346 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand 35 states. [2020-10-13 10:54:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:23,543 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2020-10-13 10:54:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:54:23,549 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 138 [2020-10-13 10:54:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:23,550 INFO L225 Difference]: With dead ends: 147 [2020-10-13 10:54:23,551 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 10:54:23,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:54:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 10:54:23,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-13 10:54:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 10:54:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2020-10-13 10:54:23,557 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 138 [2020-10-13 10:54:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:23,557 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2020-10-13 10:54:23,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:54:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2020-10-13 10:54:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 10:54:23,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:23,558 INFO L422 BasicCegarLoop]: trace histogram [65, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:23,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 10:54:23,559 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:23,559 INFO L82 PathProgramCache]: Analyzing trace with hash -122629142, now seen corresponding path program 64 times [2020-10-13 10:54:23,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:23,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463299710] [2020-10-13 10:54:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:23,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:23,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:28,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:28,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 10:54:28,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:28,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:54:28,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:28,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:54:28,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:28,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:54:28,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:29,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:29,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:29,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:29,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:29,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:29,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:29,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:29,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1056 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 10:54:29,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463299710] [2020-10-13 10:54:29,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:29,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:54:29,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38671471] [2020-10-13 10:54:29,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:54:29,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:29,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:54:29,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:54:29,212 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand 35 states. [2020-10-13 10:54:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:29,334 INFO L93 Difference]: Finished difference Result 215 states and 282 transitions. [2020-10-13 10:54:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:54:29,334 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 140 [2020-10-13 10:54:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:29,336 INFO L225 Difference]: With dead ends: 215 [2020-10-13 10:54:29,336 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 10:54:29,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:54:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 10:54:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-13 10:54:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 10:54:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2020-10-13 10:54:29,342 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 140 [2020-10-13 10:54:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:29,342 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2020-10-13 10:54:29,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:54:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2020-10-13 10:54:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 10:54:29,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:29,343 INFO L422 BasicCegarLoop]: trace histogram [66, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:29,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-13 10:54:29,344 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:29,344 INFO L82 PathProgramCache]: Analyzing trace with hash -856351321, now seen corresponding path program 65 times [2020-10-13 10:54:29,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:29,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825319293] [2020-10-13 10:54:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:29,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:29,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:34,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:34,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 10:54:34,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:34,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:54:34,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:34,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:54:34,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-13 10:54:34,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:54:34,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:35,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:35,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:35,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:35,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:35,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:35,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:35,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:35,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2211 proven. 1089 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-10-13 10:54:35,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825319293] [2020-10-13 10:54:35,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:35,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:54:35,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632869944] [2020-10-13 10:54:35,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:54:35,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:35,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:54:35,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:54:35,043 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand 36 states. [2020-10-13 10:54:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:35,243 INFO L93 Difference]: Finished difference Result 151 states and 186 transitions. [2020-10-13 10:54:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:54:35,244 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2020-10-13 10:54:35,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:35,245 INFO L225 Difference]: With dead ends: 151 [2020-10-13 10:54:35,245 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 10:54:35,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:54:35,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 10:54:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-13 10:54:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 10:54:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 179 transitions. [2020-10-13 10:54:35,249 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 179 transitions. Word has length 142 [2020-10-13 10:54:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:35,249 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 179 transitions. [2020-10-13 10:54:35,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:54:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 179 transitions. [2020-10-13 10:54:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 10:54:35,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:35,251 INFO L422 BasicCegarLoop]: trace histogram [67, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:35,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-13 10:54:35,251 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:35,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1511827998, now seen corresponding path program 66 times [2020-10-13 10:54:35,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:35,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488454315] [2020-10-13 10:54:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:35,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:35,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:40,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:40,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 10:54:40,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:40,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:54:40,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:40,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:54:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:54:40,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:40,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:40,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:40,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:40,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:40,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:40,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:40,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:40,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:40,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:40,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-13 10:54:40,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488454315] [2020-10-13 10:54:40,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:40,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:54:40,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686511061] [2020-10-13 10:54:40,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:54:40,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:40,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:54:40,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:54:40,945 INFO L87 Difference]: Start difference. First operand 145 states and 179 transitions. Second operand 36 states. [2020-10-13 10:54:41,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:41,090 INFO L93 Difference]: Finished difference Result 221 states and 290 transitions. [2020-10-13 10:54:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:54:41,097 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 144 [2020-10-13 10:54:41,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:41,099 INFO L225 Difference]: With dead ends: 221 [2020-10-13 10:54:41,099 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 10:54:41,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:54:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 10:54:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-13 10:54:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 10:54:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 181 transitions. [2020-10-13 10:54:41,104 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 181 transitions. Word has length 144 [2020-10-13 10:54:41,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:41,104 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 181 transitions. [2020-10-13 10:54:41,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:54:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2020-10-13 10:54:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 10:54:41,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:41,106 INFO L422 BasicCegarLoop]: trace histogram [68, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:41,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-13 10:54:41,106 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:41,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:41,107 INFO L82 PathProgramCache]: Analyzing trace with hash -951944929, now seen corresponding path program 67 times [2020-10-13 10:54:41,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:41,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599284787] [2020-10-13 10:54:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:41,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:46,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:46,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 10:54:46,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:46,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:54:46,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:46,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:54:46,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-13 10:54:46,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:54:46,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:46,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:46,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:46,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:46,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:46,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:46,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:46,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:46,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:46,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:46,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:46,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2346 proven. 1156 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-13 10:54:46,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599284787] [2020-10-13 10:54:46,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:46,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:54:46,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888806693] [2020-10-13 10:54:46,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:54:46,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:46,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:54:46,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:54:46,842 INFO L87 Difference]: Start difference. First operand 147 states and 181 transitions. Second operand 37 states. [2020-10-13 10:54:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:47,053 INFO L93 Difference]: Finished difference Result 155 states and 191 transitions. [2020-10-13 10:54:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:54:47,054 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 146 [2020-10-13 10:54:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:47,055 INFO L225 Difference]: With dead ends: 155 [2020-10-13 10:54:47,056 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:54:47,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:54:47,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:54:47,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-13 10:54:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 10:54:47,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 184 transitions. [2020-10-13 10:54:47,061 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 184 transitions. Word has length 146 [2020-10-13 10:54:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:47,062 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 184 transitions. [2020-10-13 10:54:47,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:54:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 184 transitions. [2020-10-13 10:54:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 10:54:47,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:47,063 INFO L422 BasicCegarLoop]: trace histogram [69, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:47,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-13 10:54:47,063 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1111995226, now seen corresponding path program 68 times [2020-10-13 10:54:47,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:47,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846761034] [2020-10-13 10:54:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:47,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:47,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:52,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 10:54:52,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:52,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:54:52,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:52,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:54:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:54:52,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:52,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:52,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:52,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:52,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:52,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:52,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:52,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2415 proven. 1190 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-13 10:54:52,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846761034] [2020-10-13 10:54:52,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:52,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:54:52,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503786152] [2020-10-13 10:54:52,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:54:52,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:52,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:54:52,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:54:52,806 INFO L87 Difference]: Start difference. First operand 149 states and 184 transitions. Second operand 37 states. [2020-10-13 10:54:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:52,942 INFO L93 Difference]: Finished difference Result 227 states and 298 transitions. [2020-10-13 10:54:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:54:52,943 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 148 [2020-10-13 10:54:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:52,944 INFO L225 Difference]: With dead ends: 227 [2020-10-13 10:54:52,944 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 10:54:52,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:54:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 10:54:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-13 10:54:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 10:54:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2020-10-13 10:54:52,950 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 148 [2020-10-13 10:54:52,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:52,950 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2020-10-13 10:54:52,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:54:52,950 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2020-10-13 10:54:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 10:54:52,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:52,952 INFO L422 BasicCegarLoop]: trace histogram [70, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:52,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-13 10:54:52,952 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:52,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1934036969, now seen corresponding path program 69 times [2020-10-13 10:54:52,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:52,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379706406] [2020-10-13 10:54:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:57,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:57,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 10:54:57,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:54:57,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:54:57,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:57,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:54:57,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-13 10:54:57,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 10:54:57,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:58,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:58,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:58,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:58,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:58,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:58,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:58,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:58,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:58,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:58,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:58,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2485 proven. 1225 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-13 10:54:58,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379706406] [2020-10-13 10:54:58,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:58,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:54:58,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821370286] [2020-10-13 10:54:58,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:54:58,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:58,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:54:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:54:58,748 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand 38 states. [2020-10-13 10:54:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:58,996 INFO L93 Difference]: Finished difference Result 159 states and 196 transitions. [2020-10-13 10:54:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:54:58,996 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 150 [2020-10-13 10:54:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:58,998 INFO L225 Difference]: With dead ends: 159 [2020-10-13 10:54:58,998 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 10:54:58,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:54:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 10:54:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-13 10:54:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 10:54:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 189 transitions. [2020-10-13 10:54:59,002 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 189 transitions. Word has length 150 [2020-10-13 10:54:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:59,003 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 189 transitions. [2020-10-13 10:54:59,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:54:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 189 transitions. [2020-10-13 10:54:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 10:54:59,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:59,004 INFO L422 BasicCegarLoop]: trace histogram [71, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:59,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-13 10:54:59,004 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:59,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:59,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2080617390, now seen corresponding path program 70 times [2020-10-13 10:54:59,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:59,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932023143] [2020-10-13 10:54:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:59,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:59,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:04,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:04,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 10:55:04,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:04,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 10:55:04,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:04,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:55:04,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:04,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 10:55:04,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:04,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:04,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:04,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:04,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:04,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:04,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:04,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:04,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:04,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:04,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:04,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2556 proven. 1260 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-13 10:55:04,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932023143] [2020-10-13 10:55:04,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:04,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:55:04,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622416352] [2020-10-13 10:55:04,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:55:04,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:04,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:55:04,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:55:04,790 INFO L87 Difference]: Start difference. First operand 153 states and 189 transitions. Second operand 38 states. [2020-10-13 10:55:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:04,925 INFO L93 Difference]: Finished difference Result 233 states and 306 transitions. [2020-10-13 10:55:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:55:04,925 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 152 [2020-10-13 10:55:04,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:04,927 INFO L225 Difference]: With dead ends: 233 [2020-10-13 10:55:04,927 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 10:55:04,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:55:04,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 10:55:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-10-13 10:55:04,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 10:55:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2020-10-13 10:55:04,932 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 152 [2020-10-13 10:55:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:04,933 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2020-10-13 10:55:04,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:55:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2020-10-13 10:55:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-13 10:55:04,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:04,934 INFO L422 BasicCegarLoop]: trace histogram [72, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:04,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-13 10:55:04,934 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:04,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2049514865, now seen corresponding path program 71 times [2020-10-13 10:55:04,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:04,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399409983] [2020-10-13 10:55:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:04,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:05,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:09,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:09,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-13 10:55:09,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:09,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:55:09,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:55:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 10:55:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 10:55:09,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:10,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:10,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:10,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:10,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:10,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:10,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:10,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:10,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:10,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2628 proven. 1296 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-13 10:55:10,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399409983] [2020-10-13 10:55:10,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:10,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:55:10,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264691418] [2020-10-13 10:55:10,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:55:10,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:10,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:55:10,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:55:10,761 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand 39 states. [2020-10-13 10:55:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:10,992 INFO L93 Difference]: Finished difference Result 163 states and 201 transitions. [2020-10-13 10:55:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:55:10,993 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 154 [2020-10-13 10:55:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:10,994 INFO L225 Difference]: With dead ends: 163 [2020-10-13 10:55:10,994 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 10:55:10,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:55:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 10:55:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-13 10:55:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 10:55:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2020-10-13 10:55:10,999 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 154 [2020-10-13 10:55:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:11,000 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2020-10-13 10:55:11,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:55:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2020-10-13 10:55:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 10:55:11,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:11,001 INFO L422 BasicCegarLoop]: trace histogram [73, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:11,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-13 10:55:11,002 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1385725750, now seen corresponding path program 72 times [2020-10-13 10:55:11,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:11,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167045661] [2020-10-13 10:55:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:11,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:16,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:16,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 10:55:16,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:16,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:55:16,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:16,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:55:16,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:16,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 10:55:16,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:16,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:16,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:16,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:16,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:16,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:16,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:16,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:16,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2701 proven. 1332 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-13 10:55:16,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167045661] [2020-10-13 10:55:16,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:16,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:55:16,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510145767] [2020-10-13 10:55:16,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:55:16,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:16,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:55:16,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:55:16,829 INFO L87 Difference]: Start difference. First operand 157 states and 194 transitions. Second operand 39 states. [2020-10-13 10:55:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:16,973 INFO L93 Difference]: Finished difference Result 239 states and 314 transitions. [2020-10-13 10:55:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:55:16,973 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 156 [2020-10-13 10:55:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:16,975 INFO L225 Difference]: With dead ends: 239 [2020-10-13 10:55:16,975 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 10:55:16,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:55:16,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 10:55:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2020-10-13 10:55:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-13 10:55:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2020-10-13 10:55:16,980 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 156 [2020-10-13 10:55:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:16,980 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2020-10-13 10:55:16,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:55:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2020-10-13 10:55:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-13 10:55:16,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:16,981 INFO L422 BasicCegarLoop]: trace histogram [74, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:16,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-13 10:55:16,982 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:16,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:16,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2002956423, now seen corresponding path program 73 times [2020-10-13 10:55:16,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:16,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138764359] [2020-10-13 10:55:16,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:17,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:17,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:21,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:21,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 10:55:21,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:21,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:55:21,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:21,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:55:21,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-13 10:55:21,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:55:21,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:22,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:22,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:22,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:22,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:22,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:22,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:22,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:22,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2775 proven. 1369 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2020-10-13 10:55:22,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138764359] [2020-10-13 10:55:22,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:22,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:55:22,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252970005] [2020-10-13 10:55:22,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:55:22,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:22,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:55:22,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:55:22,846 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand 40 states. [2020-10-13 10:55:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:23,090 INFO L93 Difference]: Finished difference Result 167 states and 206 transitions. [2020-10-13 10:55:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:55:23,090 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 158 [2020-10-13 10:55:23,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:23,091 INFO L225 Difference]: With dead ends: 167 [2020-10-13 10:55:23,091 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 10:55:23,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:55:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 10:55:23,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-13 10:55:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 10:55:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 199 transitions. [2020-10-13 10:55:23,095 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 199 transitions. Word has length 158 [2020-10-13 10:55:23,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:23,095 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 199 transitions. [2020-10-13 10:55:23,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:55:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 199 transitions. [2020-10-13 10:55:23,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-13 10:55:23,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:23,096 INFO L422 BasicCegarLoop]: trace histogram [75, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:23,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-13 10:55:23,096 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:23,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1798811842, now seen corresponding path program 74 times [2020-10-13 10:55:23,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:23,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644702792] [2020-10-13 10:55:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:23,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:23,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-13 10:55:28,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:28,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:55:28,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:55:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 10:55:28,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:28,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:28,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:28,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:28,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:28,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:28,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2850 proven. 1406 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-13 10:55:28,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644702792] [2020-10-13 10:55:28,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:28,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:55:28,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233982190] [2020-10-13 10:55:28,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:55:28,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:28,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:55:28,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:55:28,969 INFO L87 Difference]: Start difference. First operand 161 states and 199 transitions. Second operand 40 states. [2020-10-13 10:55:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:29,136 INFO L93 Difference]: Finished difference Result 245 states and 322 transitions. [2020-10-13 10:55:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:55:29,136 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 160 [2020-10-13 10:55:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:29,138 INFO L225 Difference]: With dead ends: 245 [2020-10-13 10:55:29,138 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 10:55:29,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:55:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 10:55:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-13 10:55:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-13 10:55:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2020-10-13 10:55:29,143 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 160 [2020-10-13 10:55:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:29,144 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2020-10-13 10:55:29,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:55:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2020-10-13 10:55:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 10:55:29,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:29,145 INFO L422 BasicCegarLoop]: trace histogram [76, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:29,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-13 10:55:29,145 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:29,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1617607167, now seen corresponding path program 75 times [2020-10-13 10:55:29,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:29,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385793686] [2020-10-13 10:55:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:29,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:34,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 10:55:34,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:34,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:55:34,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:55:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 10:55:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 10:55:34,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:35,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:35,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:35,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:35,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:35,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:35,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2926 proven. 1444 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-10-13 10:55:35,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385793686] [2020-10-13 10:55:35,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:35,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:55:35,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179040939] [2020-10-13 10:55:35,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:55:35,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:35,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:55:35,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:55:35,059 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand 41 states. [2020-10-13 10:55:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:35,304 INFO L93 Difference]: Finished difference Result 171 states and 211 transitions. [2020-10-13 10:55:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:55:35,304 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 162 [2020-10-13 10:55:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:35,306 INFO L225 Difference]: With dead ends: 171 [2020-10-13 10:55:35,306 INFO L226 Difference]: Without dead ends: 166 [2020-10-13 10:55:35,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:55:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-13 10:55:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-13 10:55:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-13 10:55:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 204 transitions. [2020-10-13 10:55:35,311 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 204 transitions. Word has length 162 [2020-10-13 10:55:35,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:35,312 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 204 transitions. [2020-10-13 10:55:35,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:55:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 204 transitions. [2020-10-13 10:55:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 10:55:35,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:35,313 INFO L422 BasicCegarLoop]: trace histogram [77, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:35,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-13 10:55:35,313 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:35,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:35,314 INFO L82 PathProgramCache]: Analyzing trace with hash 845364282, now seen corresponding path program 76 times [2020-10-13 10:55:35,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:35,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462812853] [2020-10-13 10:55:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:35,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:35,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:40,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 10:55:40,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:40,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:55:40,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:40,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:55:40,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:40,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 10:55:40,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:41,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:41,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:41,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:41,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:41,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:41,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:41,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:41,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:41,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:41,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:41,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 3003 proven. 1482 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-13 10:55:41,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462812853] [2020-10-13 10:55:41,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:41,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:55:41,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646615199] [2020-10-13 10:55:41,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:55:41,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:41,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:55:41,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:55:41,218 INFO L87 Difference]: Start difference. First operand 165 states and 204 transitions. Second operand 41 states. [2020-10-13 10:55:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:41,391 INFO L93 Difference]: Finished difference Result 251 states and 330 transitions. [2020-10-13 10:55:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:55:41,392 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 164 [2020-10-13 10:55:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:41,393 INFO L225 Difference]: With dead ends: 251 [2020-10-13 10:55:41,393 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 10:55:41,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:55:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 10:55:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-13 10:55:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 10:55:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 206 transitions. [2020-10-13 10:55:41,398 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 206 transitions. Word has length 164 [2020-10-13 10:55:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:41,399 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 206 transitions. [2020-10-13 10:55:41,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:55:41,399 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 206 transitions. [2020-10-13 10:55:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 10:55:41,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:41,400 INFO L422 BasicCegarLoop]: trace histogram [78, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:41,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-13 10:55:41,400 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:41,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:41,401 INFO L82 PathProgramCache]: Analyzing trace with hash -666542345, now seen corresponding path program 77 times [2020-10-13 10:55:41,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:41,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926263374] [2020-10-13 10:55:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:41,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:41,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:46,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:46,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 10:55:46,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:46,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 10:55:46,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 10:55:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-13 10:55:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 10:55:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:47,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:47,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:47,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:47,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:47,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:47,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:47,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:47,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:47,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:47,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:47,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3081 proven. 1521 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-10-13 10:55:47,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926263374] [2020-10-13 10:55:47,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:47,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 10:55:47,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206859544] [2020-10-13 10:55:47,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 10:55:47,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 10:55:47,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:55:47,358 INFO L87 Difference]: Start difference. First operand 167 states and 206 transitions. Second operand 42 states. [2020-10-13 10:55:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:47,613 INFO L93 Difference]: Finished difference Result 175 states and 216 transitions. [2020-10-13 10:55:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 10:55:47,614 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 166 [2020-10-13 10:55:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:47,615 INFO L225 Difference]: With dead ends: 175 [2020-10-13 10:55:47,615 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 10:55:47,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:55:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 10:55:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-13 10:55:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 10:55:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 209 transitions. [2020-10-13 10:55:47,620 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 209 transitions. Word has length 166 [2020-10-13 10:55:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:47,621 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 209 transitions. [2020-10-13 10:55:47,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 10:55:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 209 transitions. [2020-10-13 10:55:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 10:55:47,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:47,622 INFO L422 BasicCegarLoop]: trace histogram [79, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:47,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-13 10:55:47,622 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash 505971506, now seen corresponding path program 78 times [2020-10-13 10:55:47,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:47,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962091234] [2020-10-13 10:55:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:47,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:48,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking...