/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/array-examples/standard_copy2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:45:33,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:45:33,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:45:33,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:45:33,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:45:33,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:45:33,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:45:33,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:45:33,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:45:33,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:45:33,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:45:33,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:45:33,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:45:33,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:45:33,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:45:33,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:45:33,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:45:33,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:45:33,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:45:33,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:45:33,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:45:33,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:45:33,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:45:33,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:45:33,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:45:33,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:45:33,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:45:33,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:45:33,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:45:33,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:45:33,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:45:33,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:45:33,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:45:33,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:45:33,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:45:33,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:45:33,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:45:33,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:45:33,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:45:33,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:45:33,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:45:33,514 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 04:45:33,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:45:33,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:45:33,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:45:33,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:45:33,548 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:45:33,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:45:33,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:45:33,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:45:33,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:45:33,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:45:33,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:45:33,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:45:33,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:45:33,550 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:45:33,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:45:33,550 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:45:33,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:45:33,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:45:33,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:45:33,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:45:33,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:45:33,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:45:33,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:45:33,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:45:33,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:45:33,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:45:33,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:45:33,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:45:33,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:45:33,553 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 04:45:33,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:45:33,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:45:33,849 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:45:33,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:45:33,851 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:45:33,852 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2020-10-13 04:45:33,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c796be6b6/0f47c4794bbe421b9c04ba4464891793/FLAGa6aa82c69 [2020-10-13 04:45:34,391 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:45:34,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2020-10-13 04:45:34,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c796be6b6/0f47c4794bbe421b9c04ba4464891793/FLAGa6aa82c69 [2020-10-13 04:45:34,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c796be6b6/0f47c4794bbe421b9c04ba4464891793 [2020-10-13 04:45:34,780 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:45:34,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:45:34,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:45:34,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:45:34,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:45:34,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:45:34" (1/1) ... [2020-10-13 04:45:34,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2baf6fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:34, skipping insertion in model container [2020-10-13 04:45:34,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:45:34" (1/1) ... [2020-10-13 04:45:34,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:45:34,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:45:34,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:45:34,992 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:45:35,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:45:35,035 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:45:35,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:35 WrapperNode [2020-10-13 04:45:35,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:45:35,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:45:35,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:45:35,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:45:35,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:35" (1/1) ... [2020-10-13 04:45:35,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:35" (1/1) ... [2020-10-13 04:45:35,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:35" (1/1) ... [2020-10-13 04:45:35,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:35" (1/1) ... [2020-10-13 04:45:35,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:35" (1/1) ... [2020-10-13 04:45:35,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:35" (1/1) ... [2020-10-13 04:45:35,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:35" (1/1) ... [2020-10-13 04:45:35,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:45:35,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:45:35,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:45:35,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:45:35,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:35" (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 04:45:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:45:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:45:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:45:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:45:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:45:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:45:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:45:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:45:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:45:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:45:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:45:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:45:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:45:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:45:35,480 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:45:35,480 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 04:45:35,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:45:35 BoogieIcfgContainer [2020-10-13 04:45:35,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:45:35,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:45:35,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:45:35,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:45:35,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:45:34" (1/3) ... [2020-10-13 04:45:35,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b026c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:45:35, skipping insertion in model container [2020-10-13 04:45:35,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:45:35" (2/3) ... [2020-10-13 04:45:35,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b026c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:45:35, skipping insertion in model container [2020-10-13 04:45:35,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:45:35" (3/3) ... [2020-10-13 04:45:35,498 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2020-10-13 04:45:35,523 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:45:35,540 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:45:35,570 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:45:35,598 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:45:35,598 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:45:35,599 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:45:35,599 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:45:35,599 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:45:35,599 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:45:35,599 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:45:35,599 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:45:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-13 04:45:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:45:35,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:35,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:35,622 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:35,627 INFO L82 PathProgramCache]: Analyzing trace with hash 415311520, now seen corresponding path program 1 times [2020-10-13 04:45:35,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:35,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217896517] [2020-10-13 04:45:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:35,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:35,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:35,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:36,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:36,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:45:36,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:36,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-13 04:45:36,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:36,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:36,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:45:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:36,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:45:36,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:36,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:36,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:36,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:36,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:36,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:45:36,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:36,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:36,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:45:36,192 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 04:45:36,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217896517] [2020-10-13 04:45:36,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:45:36,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:45:36,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220911941] [2020-10-13 04:45:36,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:45:36,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:45:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:45:36,219 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-13 04:45:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:36,314 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-10-13 04:45:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:45:36,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 04:45:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:36,325 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:45:36,325 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 04:45:36,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:45:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 04:45:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 04:45:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:45:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 04:45:36,370 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-13 04:45:36,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:36,371 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 04:45:36,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:45:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 04:45:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:45:36,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:36,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:36,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:45:36,373 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:36,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:36,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1687882214, now seen corresponding path program 1 times [2020-10-13 04:45:36,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:36,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260705141] [2020-10-13 04:45:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:36,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:36,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:36,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:36,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:36,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:45:36,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:36,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-13 04:45:36,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:45:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:36,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:45:36,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:45:36,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:36,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:36,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:36,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:36,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:36,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:45:36,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:36,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:36,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:36,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:36,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:36,702 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 04:45:36,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260705141] [2020-10-13 04:45:36,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:45:36,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:45:36,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358128515] [2020-10-13 04:45:36,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:45:36,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:36,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:45:36,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:45:36,706 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-13 04:45:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:36,769 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-13 04:45:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:45:36,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 04:45:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:36,770 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:45:36,771 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:45:36,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:45:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:45:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-13 04:45:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 04:45:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-13 04:45:36,779 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-13 04:45:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:36,779 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-13 04:45:36,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:45:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-13 04:45:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:45:36,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:36,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:36,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:45:36,781 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1114616120, now seen corresponding path program 1 times [2020-10-13 04:45:36,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:36,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316890205] [2020-10-13 04:45:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:36,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:36,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:36,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:37,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:45:37,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:37,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-13 04:45:37,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:45:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:45:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:45:37,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:37,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:37,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:37,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:37,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:37,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:45:37,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:37,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:45:37,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316890205] [2020-10-13 04:45:37,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:45:37,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:45:37,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890594830] [2020-10-13 04:45:37,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:45:37,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:37,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:45:37,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:45:37,082 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-10-13 04:45:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:37,196 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-13 04:45:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:45:37,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 04:45:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:37,198 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:45:37,198 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 04:45:37,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:45:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 04:45:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-13 04:45:37,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:45:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 04:45:37,210 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2020-10-13 04:45:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:37,211 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 04:45:37,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:45:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 04:45:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:45:37,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:37,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:37,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:45:37,212 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:37,213 INFO L82 PathProgramCache]: Analyzing trace with hash -825329612, now seen corresponding path program 1 times [2020-10-13 04:45:37,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:37,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338622054] [2020-10-13 04:45:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:37,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:38,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:38,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:45:38,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:45:38,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1173 [2020-10-13 04:45:38,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:45:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:45:38,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:38,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:38,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:38,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:38,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:38,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:38,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:38,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:38,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:38,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:38,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:38,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 04:45:38,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338622054] [2020-10-13 04:45:38,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:38,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:45:38,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24062571] [2020-10-13 04:45:38,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:45:38,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:38,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:45:38,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:45:38,443 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-10-13 04:45:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:38,513 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-13 04:45:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:45:38,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 04:45:38,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:38,514 INFO L225 Difference]: With dead ends: 50 [2020-10-13 04:45:38,514 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 04:45:38,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:45:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 04:45:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 04:45:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 04:45:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-13 04:45:38,521 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2020-10-13 04:45:38,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:38,522 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-13 04:45:38,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:45:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-13 04:45:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:45:38,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:38,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:38,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:45:38,523 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:38,524 INFO L82 PathProgramCache]: Analyzing trace with hash -425990958, now seen corresponding path program 2 times [2020-10-13 04:45:38,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:38,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175132686] [2020-10-13 04:45:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:38,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:38,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:38,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:38,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:39,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:39,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:45:39,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:45:39,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1334 [2020-10-13 04:45:39,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:39,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:45:39,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:45:39,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:45:39,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:45:39,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:39,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:39,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:39,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:39,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:39,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:39,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:39,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:39,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:39,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:39,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:45:39,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175132686] [2020-10-13 04:45:39,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:39,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:45:39,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416951735] [2020-10-13 04:45:39,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:45:39,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:45:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:45:39,914 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-10-13 04:45:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:40,056 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-13 04:45:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:45:40,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-13 04:45:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:40,058 INFO L225 Difference]: With dead ends: 51 [2020-10-13 04:45:40,058 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 04:45:40,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:45:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 04:45:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-13 04:45:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:45:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 04:45:40,072 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-10-13 04:45:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:40,072 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 04:45:40,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:45:40,073 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 04:45:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:45:40,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:40,074 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:40,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:45:40,074 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:40,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1714175694, now seen corresponding path program 3 times [2020-10-13 04:45:40,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:40,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244378309] [2020-10-13 04:45:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:40,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:40,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:41,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:44,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:44,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:45:44,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:45:44,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3968 [2020-10-13 04:45:44,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:44,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:45:44,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:45:44,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:45:44,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:45:44,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:44,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:44,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:44,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:44,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:44,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:45:44,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:44,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:44,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:44,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:44,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:45:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 04:45:44,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244378309] [2020-10-13 04:45:44,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:44,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:45:44,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980012940] [2020-10-13 04:45:44,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:45:44,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:44,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:45:44,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:45:44,137 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 6 states. [2020-10-13 04:45:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:44,304 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-13 04:45:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:45:44,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-13 04:45:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:44,308 INFO L225 Difference]: With dead ends: 57 [2020-10-13 04:45:44,308 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:45:44,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:45:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:45:44,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-13 04:45:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:45:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-13 04:45:44,319 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2020-10-13 04:45:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:44,320 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-13 04:45:44,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:45:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-13 04:45:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 04:45:44,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:44,321 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:44,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:45:44,321 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1163143882, now seen corresponding path program 4 times [2020-10-13 04:45:44,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:44,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10089307] [2020-10-13 04:45:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:44,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:44,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:45,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:49,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:49,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 04:45:49,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:45:49,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:45:49,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:45:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:45:49,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:49,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:49,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:49,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:49,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:49,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:49,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:45:49,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:49,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:49,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:49,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:49,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:45:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 04:45:49,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10089307] [2020-10-13 04:45:49,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:49,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:45:49,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071568533] [2020-10-13 04:45:49,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:45:49,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:49,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:45:49,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:45:49,400 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 6 states. [2020-10-13 04:45:49,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:49,506 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-13 04:45:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:45:49,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-13 04:45:49,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:49,508 INFO L225 Difference]: With dead ends: 68 [2020-10-13 04:45:49,508 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:45:49,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:45:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:45:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-13 04:45:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:45:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-13 04:45:49,519 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2020-10-13 04:45:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:49,520 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-13 04:45:49,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:45:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-13 04:45:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:45:49,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:49,523 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:49,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:45:49,525 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:49,525 INFO L82 PathProgramCache]: Analyzing trace with hash 561048040, now seen corresponding path program 5 times [2020-10-13 04:45:49,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:49,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392117897] [2020-10-13 04:45:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:49,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:49,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:50,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:54,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:54,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:45:54,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:45:54,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:45:54,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:54,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:45:54,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:54,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:45:54,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:54,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:54,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:54,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:54,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:54,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:54,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:45:54,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:54,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:54,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:45:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 04:45:54,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392117897] [2020-10-13 04:45:54,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:54,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:45:54,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122230239] [2020-10-13 04:45:54,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:45:54,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:54,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:45:54,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:45:54,615 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 7 states. [2020-10-13 04:45:54,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:54,718 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-13 04:45:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:45:54,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-13 04:45:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:54,719 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:45:54,720 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:45:54,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:45:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:45:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-13 04:45:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:45:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 04:45:54,731 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2020-10-13 04:45:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:54,731 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 04:45:54,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:45:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 04:45:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:45:54,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:54,734 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:54,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:45:54,734 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:54,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:54,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1767528838, now seen corresponding path program 6 times [2020-10-13 04:45:54,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:54,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858384351] [2020-10-13 04:45:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:54,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:54,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:54,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:56,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:59,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:59,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:45:59,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:45:59,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:45:59,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:59,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:45:59,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:45:59,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:45:59,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:59,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:59,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:59,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:59,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:59,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:59,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:59,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:45:59,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858384351] [2020-10-13 04:45:59,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:59,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:45:59,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330799331] [2020-10-13 04:45:59,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:45:59,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:59,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:45:59,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:45:59,816 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 7 states. [2020-10-13 04:45:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:59,927 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-13 04:45:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:45:59,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-13 04:45:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:59,929 INFO L225 Difference]: With dead ends: 67 [2020-10-13 04:45:59,929 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 04:45:59,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:45:59,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 04:45:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-13 04:45:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:45:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-13 04:45:59,938 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 37 [2020-10-13 04:45:59,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:59,939 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-13 04:45:59,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:45:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-13 04:45:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:45:59,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:59,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:59,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:45:59,942 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:59,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:59,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2115443074, now seen corresponding path program 7 times [2020-10-13 04:45:59,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:59,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459670189] [2020-10-13 04:45:59,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:59,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:59,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:59,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:04,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:04,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:46:04,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:04,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:46:04,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:04,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:46:04,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 04:46:04,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:46:04,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:05,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:05,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:05,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:05,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:05,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:05,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:05,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:05,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:05,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:05,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 04:46:05,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459670189] [2020-10-13 04:46:05,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:05,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:46:05,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152999213] [2020-10-13 04:46:05,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:46:05,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:05,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:46:05,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:05,027 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 8 states. [2020-10-13 04:46:05,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:05,141 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-13 04:46:05,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:46:05,141 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-13 04:46:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:05,142 INFO L225 Difference]: With dead ends: 73 [2020-10-13 04:46:05,142 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:46:05,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:46:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-13 04:46:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 04:46:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-13 04:46:05,149 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 41 [2020-10-13 04:46:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:05,149 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-13 04:46:05,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:46:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-13 04:46:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 04:46:05,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:05,150 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:05,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:46:05,150 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:05,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1445958786, now seen corresponding path program 8 times [2020-10-13 04:46:05,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:05,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978920818] [2020-10-13 04:46:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:05,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:07,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:10,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:10,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 04:46:10,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:10,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:46:10,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:46:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:46:10,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:10,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:10,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:10,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:10,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:10,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:10,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:10,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:10,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:10,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:10,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:10,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 04:46:10,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978920818] [2020-10-13 04:46:10,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:10,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:46:10,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915950953] [2020-10-13 04:46:10,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:46:10,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:46:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:10,237 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 8 states. [2020-10-13 04:46:10,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:10,307 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-13 04:46:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:46:10,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-13 04:46:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:10,308 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:46:10,309 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:46:10,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:46:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 04:46:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:46:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 04:46:10,322 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2020-10-13 04:46:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:10,322 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 04:46:10,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:46:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 04:46:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:46:10,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:10,327 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:10,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:46:10,327 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:10,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:10,328 INFO L82 PathProgramCache]: Analyzing trace with hash -249467492, now seen corresponding path program 9 times [2020-10-13 04:46:10,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:10,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169792681] [2020-10-13 04:46:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:10,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:10,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:10,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:13,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:15,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:15,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:46:15,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:15,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:46:15,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:46:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:46:15,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:15,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:15,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:15,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:15,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:15,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:15,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:15,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:15,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:15,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:15,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:15,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 04:46:15,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169792681] [2020-10-13 04:46:15,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:15,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:46:15,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247013520] [2020-10-13 04:46:15,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:46:15,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:15,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:46:15,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:46:15,425 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 9 states. [2020-10-13 04:46:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:15,511 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-13 04:46:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:46:15,512 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-13 04:46:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:15,513 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:46:15,513 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 04:46:15,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:46:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 04:46:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-13 04:46:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:46:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-13 04:46:15,526 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 47 [2020-10-13 04:46:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:15,527 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-13 04:46:15,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:46:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-13 04:46:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:46:15,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:15,531 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:15,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:46:15,532 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:15,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1472569286, now seen corresponding path program 10 times [2020-10-13 04:46:15,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:15,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546055128] [2020-10-13 04:46:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:15,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:15,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:15,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:19,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:20,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:20,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:46:20,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:20,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:46:20,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:46:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 04:46:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:46:20,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:20,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:20,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:20,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:20,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:20,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:20,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:20,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:20,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:20,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:20,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:20,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-13 04:46:20,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546055128] [2020-10-13 04:46:20,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:20,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:46:20,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260645685] [2020-10-13 04:46:20,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:46:20,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:20,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:46:20,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:46:20,643 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 9 states. [2020-10-13 04:46:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:20,750 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-10-13 04:46:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:46:20,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-13 04:46:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:20,752 INFO L225 Difference]: With dead ends: 83 [2020-10-13 04:46:20,752 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 04:46:20,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:46:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 04:46:20,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-13 04:46:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:46:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-13 04:46:20,759 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2020-10-13 04:46:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:20,760 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-13 04:46:20,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:46:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-13 04:46:20,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:46:20,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:20,761 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:20,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:46:20,762 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:20,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:20,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1592097226, now seen corresponding path program 11 times [2020-10-13 04:46:20,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:20,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901465650] [2020-10-13 04:46:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:20,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:20,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:20,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:25,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:25,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 04:46:25,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:46:25,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:46:25,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:25,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:46:25,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:46:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:46:25,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:25,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:25,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:25,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:25,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:25,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:25,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:25,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:25,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:25,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:25,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:25,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 04:46:25,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901465650] [2020-10-13 04:46:25,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:25,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:46:25,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522614394] [2020-10-13 04:46:25,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:46:25,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:25,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:46:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:46:25,852 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 10 states. [2020-10-13 04:46:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:25,995 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-10-13 04:46:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:46:25,996 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-13 04:46:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:25,996 INFO L225 Difference]: With dead ends: 89 [2020-10-13 04:46:25,997 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:46:26,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:46:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:46:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-13 04:46:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:46:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-13 04:46:26,010 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 53 [2020-10-13 04:46:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:26,011 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-13 04:46:26,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:46:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-13 04:46:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 04:46:26,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:26,012 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:26,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:46:26,012 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:26,013 INFO L82 PathProgramCache]: Analyzing trace with hash -790872526, now seen corresponding path program 12 times [2020-10-13 04:46:26,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:26,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175560208] [2020-10-13 04:46:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:26,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:31,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:31,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 04:46:31,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:46:31,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:46:31,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:31,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:46:31,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:31,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:46:31,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:31,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:31,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:31,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:31,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:31,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:31,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:31,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:31,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:31,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:31,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:31,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-13 04:46:31,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175560208] [2020-10-13 04:46:31,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:31,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:46:31,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004991624] [2020-10-13 04:46:31,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:46:31,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:31,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:46:31,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:46:31,091 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 10 states. [2020-10-13 04:46:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:31,186 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-10-13 04:46:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:46:31,186 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-13 04:46:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:31,187 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:46:31,187 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:46:31,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:46:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:46:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 04:46:31,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:46:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-13 04:46:31,201 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2020-10-13 04:46:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:31,202 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-13 04:46:31,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:46:31,202 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-13 04:46:31,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:46:31,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:31,203 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:31,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:46:31,204 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:31,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:31,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1609235632, now seen corresponding path program 13 times [2020-10-13 04:46:31,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:31,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979445328] [2020-10-13 04:46:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:31,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:31,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:31,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:36,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:36,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:46:36,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:46:36,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:46:36,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:36,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:46:36,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 04:46:36,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:46:36,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:36,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:36,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:36,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:36,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:36,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:36,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:36,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:36,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-13 04:46:36,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979445328] [2020-10-13 04:46:36,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:36,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:46:36,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499993422] [2020-10-13 04:46:36,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:46:36,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:46:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:46:36,322 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 11 states. [2020-10-13 04:46:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:36,437 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2020-10-13 04:46:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:46:36,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-13 04:46:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:36,438 INFO L225 Difference]: With dead ends: 97 [2020-10-13 04:46:36,438 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 04:46:36,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:46:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 04:46:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-13 04:46:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:46:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-13 04:46:36,446 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 59 [2020-10-13 04:46:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:36,447 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-13 04:46:36,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:46:36,447 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-13 04:46:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:46:36,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:36,447 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:36,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:46:36,448 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1042313652, now seen corresponding path program 14 times [2020-10-13 04:46:36,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:36,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218965717] [2020-10-13 04:46:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:36,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:36,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:36,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:41,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:41,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:46:41,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:46:41,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:46:41,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:46:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:46:41,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:41,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:41,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:41,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:41,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:41,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:41,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:41,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:41,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-13 04:46:41,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218965717] [2020-10-13 04:46:41,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:41,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:46:41,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537047408] [2020-10-13 04:46:41,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:46:41,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:41,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:46:41,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:46:41,560 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 11 states. [2020-10-13 04:46:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:41,641 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-10-13 04:46:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:46:41,641 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2020-10-13 04:46:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:41,643 INFO L225 Difference]: With dead ends: 118 [2020-10-13 04:46:41,643 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:46:41,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:46:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:46:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 04:46:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:46:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-13 04:46:41,650 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 63 [2020-10-13 04:46:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:41,650 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-13 04:46:41,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:46:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-13 04:46:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 04:46:41,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:41,651 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:41,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:46:41,651 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:41,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:41,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1515485974, now seen corresponding path program 15 times [2020-10-13 04:46:41,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:41,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044658104] [2020-10-13 04:46:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:41,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:41,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:46,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:46,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 04:46:46,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:46:46,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:46:46,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:46,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:46:46,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:46:46,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:46:46,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:46,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:46,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:46,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:46,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:46,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:46,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:46,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:46,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:46,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:46,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:46,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-13 04:46:46,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044658104] [2020-10-13 04:46:46,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:46,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:46:46,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997847771] [2020-10-13 04:46:46,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:46:46,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:46,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:46:46,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:46:46,762 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 12 states. [2020-10-13 04:46:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:46,930 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2020-10-13 04:46:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:46:46,930 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-13 04:46:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:46,932 INFO L225 Difference]: With dead ends: 105 [2020-10-13 04:46:46,932 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 04:46:46,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:46:46,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 04:46:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-13 04:46:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:46:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-13 04:46:46,938 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 65 [2020-10-13 04:46:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:46,938 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-13 04:46:46,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:46:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-13 04:46:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 04:46:46,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:46,939 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:46,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:46:46,939 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:46,940 INFO L82 PathProgramCache]: Analyzing trace with hash -965958938, now seen corresponding path program 16 times [2020-10-13 04:46:46,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:46,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723744934] [2020-10-13 04:46:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:46,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:47,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:51,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:51,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 04:46:51,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:46:51,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:46:51,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:51,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:46:51,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:51,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:46:51,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:52,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:52,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:52,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:52,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:52,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:52,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:52,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:52,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:52,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:52,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:52,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-13 04:46:52,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723744934] [2020-10-13 04:46:52,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:52,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:46:52,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671958328] [2020-10-13 04:46:52,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:46:52,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:52,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:46:52,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:46:52,055 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 12 states. [2020-10-13 04:46:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:52,171 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-13 04:46:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:46:52,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-13 04:46:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:52,173 INFO L225 Difference]: With dead ends: 128 [2020-10-13 04:46:52,173 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 04:46:52,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:46:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 04:46:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 04:46:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:46:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 04:46:52,179 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2020-10-13 04:46:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:52,179 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 04:46:52,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:46:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 04:46:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:46:52,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:52,180 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:52,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:46:52,181 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1224780548, now seen corresponding path program 17 times [2020-10-13 04:46:52,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:52,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870213071] [2020-10-13 04:46:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:52,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:52,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:52,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:57,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:57,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:46:57,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:46:57,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:46:57,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:46:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 04:46:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:46:57,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:57,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:57,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:57,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:57,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:57,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:57,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:57,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:57,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:57,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:57,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-13 04:46:57,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870213071] [2020-10-13 04:46:57,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:57,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:46:57,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108793257] [2020-10-13 04:46:57,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:46:57,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:57,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:46:57,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:46:57,305 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 13 states. [2020-10-13 04:46:57,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:57,469 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-10-13 04:46:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:46:57,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-10-13 04:46:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:57,470 INFO L225 Difference]: With dead ends: 113 [2020-10-13 04:46:57,470 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 04:46:57,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:46:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 04:46:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-13 04:46:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:46:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-10-13 04:46:57,476 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 71 [2020-10-13 04:46:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:57,476 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-10-13 04:46:57,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:46:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-10-13 04:46:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:46:57,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:57,477 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:57,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:46:57,478 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:57,478 INFO L82 PathProgramCache]: Analyzing trace with hash 307633152, now seen corresponding path program 18 times [2020-10-13 04:46:57,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:57,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735695970] [2020-10-13 04:46:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:57,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:57,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:57,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:02,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:02,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:47:02,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:02,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:47:02,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:02,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:47:02,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:02,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:47:02,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:02,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:02,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:02,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:02,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:02,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:02,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:02,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:02,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:02,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:02,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:02,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-13 04:47:02,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735695970] [2020-10-13 04:47:02,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:02,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:47:02,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545146448] [2020-10-13 04:47:02,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:47:02,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:02,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:47:02,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:02,602 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 13 states. [2020-10-13 04:47:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:02,690 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-10-13 04:47:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:47:02,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-10-13 04:47:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:02,691 INFO L225 Difference]: With dead ends: 138 [2020-10-13 04:47:02,691 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 04:47:02,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 04:47:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-13 04:47:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:47:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 04:47:02,698 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 75 [2020-10-13 04:47:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:02,698 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 04:47:02,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:47:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 04:47:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 04:47:02,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:02,699 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:02,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:47:02,699 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:02,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:02,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1161882210, now seen corresponding path program 19 times [2020-10-13 04:47:02,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:02,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144911104] [2020-10-13 04:47:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:02,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:07,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:07,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 04:47:07,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:07,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 04:47:07,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:07,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:47:07,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 04:47:07,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:47:07,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:07,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:07,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:07,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:07,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:07,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:07,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:07,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:07,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-13 04:47:07,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144911104] [2020-10-13 04:47:07,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:07,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:47:07,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122478699] [2020-10-13 04:47:07,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:47:07,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:07,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:47:07,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:47:07,851 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 14 states. [2020-10-13 04:47:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:08,038 INFO L93 Difference]: Finished difference Result 121 states and 127 transitions. [2020-10-13 04:47:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:47:08,041 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-10-13 04:47:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:08,042 INFO L225 Difference]: With dead ends: 121 [2020-10-13 04:47:08,042 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:47:08,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:47:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:47:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-13 04:47:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:47:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-13 04:47:08,048 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 77 [2020-10-13 04:47:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:08,048 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-13 04:47:08,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:47:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-13 04:47:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 04:47:08,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:08,049 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:08,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:47:08,049 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:08,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1359570534, now seen corresponding path program 20 times [2020-10-13 04:47:08,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:08,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224769564] [2020-10-13 04:47:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:08,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:13,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:13,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 04:47:13,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:13,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:47:13,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:47:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:47:13,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:13,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:13,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:13,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:13,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:13,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:13,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:13,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 04:47:13,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224769564] [2020-10-13 04:47:13,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:13,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:47:13,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159174471] [2020-10-13 04:47:13,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:47:13,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:13,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:47:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:47:13,188 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 14 states. [2020-10-13 04:47:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:13,314 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2020-10-13 04:47:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:47:13,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-13 04:47:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:13,315 INFO L225 Difference]: With dead ends: 148 [2020-10-13 04:47:13,315 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:47:13,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:47:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:47:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 04:47:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:47:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-13 04:47:13,320 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 81 [2020-10-13 04:47:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:13,320 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-13 04:47:13,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:47:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-13 04:47:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:47:13,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:13,321 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:13,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:47:13,321 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:13,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:13,322 INFO L82 PathProgramCache]: Analyzing trace with hash -15113032, now seen corresponding path program 21 times [2020-10-13 04:47:13,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:13,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664703124] [2020-10-13 04:47:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:13,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:13,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:18,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:18,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:47:18,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:47:18,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:47:18,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:18,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:47:18,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:47:18,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:47:18,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:18,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:18,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:18,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:18,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:18,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:18,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:18,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:18,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:18,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:18,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:18,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 04:47:18,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664703124] [2020-10-13 04:47:18,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:18,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:47:18,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523073864] [2020-10-13 04:47:18,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:47:18,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:47:18,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:47:18,497 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 15 states. [2020-10-13 04:47:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:18,687 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2020-10-13 04:47:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:47:18,688 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-10-13 04:47:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:18,689 INFO L225 Difference]: With dead ends: 129 [2020-10-13 04:47:18,689 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 04:47:18,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:47:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 04:47:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-13 04:47:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:47:18,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-13 04:47:18,694 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 83 [2020-10-13 04:47:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:18,694 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-13 04:47:18,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:47:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-13 04:47:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:47:18,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:18,695 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:18,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:47:18,696 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:18,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1255097420, now seen corresponding path program 22 times [2020-10-13 04:47:18,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:18,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616050501] [2020-10-13 04:47:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:18,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:23,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:23,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:47:23,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:47:23,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:47:23,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:47:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:47:23,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:23,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:23,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:23,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:23,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:23,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:23,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:23,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:23,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:23,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:23,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:23,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 04:47:23,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616050501] [2020-10-13 04:47:23,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:23,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:47:23,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230431868] [2020-10-13 04:47:23,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:47:23,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:23,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:47:23,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:47:23,854 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 15 states. [2020-10-13 04:47:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:23,959 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2020-10-13 04:47:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:47:23,960 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 87 [2020-10-13 04:47:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:23,961 INFO L225 Difference]: With dead ends: 158 [2020-10-13 04:47:23,961 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:47:23,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:47:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:47:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-13 04:47:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:47:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-10-13 04:47:23,969 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 87 [2020-10-13 04:47:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:23,969 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-10-13 04:47:23,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:47:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-10-13 04:47:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 04:47:23,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:23,970 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:23,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:47:23,971 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:23,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1479919534, now seen corresponding path program 23 times [2020-10-13 04:47:23,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:23,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347287816] [2020-10-13 04:47:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:23,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:29,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 04:47:29,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:47:29,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 04:47:29,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:29,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:47:29,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 04:47:29,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:47:29,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:29,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:29,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:29,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:29,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:29,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:29,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:29,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:29,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:29,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:29,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 04:47:29,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347287816] [2020-10-13 04:47:29,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:29,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:47:29,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829779466] [2020-10-13 04:47:29,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:47:29,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:29,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:47:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:47:29,172 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 16 states. [2020-10-13 04:47:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:29,365 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2020-10-13 04:47:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:47:29,366 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2020-10-13 04:47:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:29,367 INFO L225 Difference]: With dead ends: 137 [2020-10-13 04:47:29,367 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 04:47:29,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:47:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 04:47:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-13 04:47:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 04:47:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-13 04:47:29,374 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 89 [2020-10-13 04:47:29,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:29,375 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-13 04:47:29,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:47:29,375 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-13 04:47:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 04:47:29,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:29,376 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:29,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:47:29,377 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:29,377 INFO L82 PathProgramCache]: Analyzing trace with hash 124723790, now seen corresponding path program 24 times [2020-10-13 04:47:29,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:29,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450241293] [2020-10-13 04:47:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:29,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:34,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:34,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 04:47:34,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:47:34,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:47:34,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:34,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:47:34,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:34,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:47:34,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:34,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:34,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:34,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:34,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:34,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:34,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:34,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:34,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:34,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-13 04:47:34,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450241293] [2020-10-13 04:47:34,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:34,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:47:34,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045398241] [2020-10-13 04:47:34,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:47:34,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:34,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:47:34,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:47:34,541 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 16 states. [2020-10-13 04:47:34,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:34,669 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2020-10-13 04:47:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:47:34,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 93 [2020-10-13 04:47:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:34,670 INFO L225 Difference]: With dead ends: 168 [2020-10-13 04:47:34,671 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:47:34,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:47:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:47:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-13 04:47:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:47:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-10-13 04:47:34,677 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 93 [2020-10-13 04:47:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:34,677 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-10-13 04:47:34,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:47:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-10-13 04:47:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:47:34,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:34,679 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:34,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:47:34,681 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:34,681 INFO L82 PathProgramCache]: Analyzing trace with hash 236204140, now seen corresponding path program 25 times [2020-10-13 04:47:34,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:34,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149315009] [2020-10-13 04:47:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:34,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:39,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:39,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:47:39,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:47:39,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 04:47:39,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:47:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:47:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:47:39,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:39,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:39,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:39,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:39,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:39,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:39,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:39,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:39,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-13 04:47:39,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149315009] [2020-10-13 04:47:39,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:39,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:47:39,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619844729] [2020-10-13 04:47:39,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:47:39,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:39,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:47:39,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:47:39,899 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 17 states. [2020-10-13 04:47:40,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:40,099 INFO L93 Difference]: Finished difference Result 145 states and 151 transitions. [2020-10-13 04:47:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:47:40,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 95 [2020-10-13 04:47:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:40,107 INFO L225 Difference]: With dead ends: 145 [2020-10-13 04:47:40,107 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 04:47:40,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:47:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 04:47:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-10-13 04:47:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:47:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2020-10-13 04:47:40,112 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 95 [2020-10-13 04:47:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:40,112 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2020-10-13 04:47:40,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:47:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2020-10-13 04:47:40,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:47:40,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:40,114 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:40,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:47:40,114 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:40,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:40,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1952158360, now seen corresponding path program 26 times [2020-10-13 04:47:40,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:40,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348638975] [2020-10-13 04:47:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:40,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:45,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:45,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:47:45,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:47:45,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-13 04:47:45,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:45,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:47:45,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:45,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:47:45,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:45,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:45,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:45,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:45,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:45,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:45,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:45,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:45,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:45,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:45,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:45,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-13 04:47:45,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348638975] [2020-10-13 04:47:45,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:45,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:47:45,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351673103] [2020-10-13 04:47:45,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:47:45,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:45,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:47:45,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:47:45,340 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 17 states. [2020-10-13 04:47:45,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:45,480 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2020-10-13 04:47:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:47:45,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 99 [2020-10-13 04:47:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:45,482 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:47:45,482 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:47:45,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:47:45,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:47:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 04:47:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:47:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-13 04:47:45,488 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 99 [2020-10-13 04:47:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:45,488 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-13 04:47:45,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:47:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-13 04:47:45,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 04:47:45,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:45,489 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:45,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:47:45,490 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash 214035718, now seen corresponding path program 27 times [2020-10-13 04:47:45,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:45,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028996319] [2020-10-13 04:47:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:45,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:45,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:50,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:50,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:47:50,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:47:50,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-13 04:47:50,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:47:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:47:50,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:50,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:50,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:50,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:50,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:50,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:50,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:47:50,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:50,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:50,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:50,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:50,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-13 04:47:50,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028996319] [2020-10-13 04:47:50,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:50,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:47:50,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080986619] [2020-10-13 04:47:50,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:47:50,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:50,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:47:50,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:47:50,739 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 18 states. [2020-10-13 04:47:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:50,885 INFO L93 Difference]: Finished difference Result 180 states and 186 transitions. [2020-10-13 04:47:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:47:50,885 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-10-13 04:47:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:50,886 INFO L225 Difference]: With dead ends: 180 [2020-10-13 04:47:50,886 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 04:47:50,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:47:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 04:47:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-13 04:47:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:47:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-13 04:47:50,896 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 101 [2020-10-13 04:47:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:50,896 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-13 04:47:50,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:47:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-13 04:47:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 04:47:50,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:50,897 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:50,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:47:50,898 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1132593884, now seen corresponding path program 28 times [2020-10-13 04:47:50,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:50,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332508919] [2020-10-13 04:47:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:50,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:50,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:55,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:55,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 04:47:55,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:47:55,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:47:55,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:55,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:47:55,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 04:47:55,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:47:55,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:56,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:56,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:56,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:56,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:56,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2020-10-13 04:47:56,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332508919] [2020-10-13 04:47:56,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:56,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:47:56,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519141231] [2020-10-13 04:47:56,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:47:56,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:56,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:47:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:47:56,117 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 18 states. [2020-10-13 04:47:56,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:56,349 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2020-10-13 04:47:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:47:56,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2020-10-13 04:47:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:56,351 INFO L225 Difference]: With dead ends: 155 [2020-10-13 04:47:56,351 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 04:47:56,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:47:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 04:47:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-13 04:47:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:47:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-13 04:47:56,357 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 103 [2020-10-13 04:47:56,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:56,358 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-13 04:47:56,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:47:56,358 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-13 04:47:56,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:47:56,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:56,359 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:56,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:47:56,360 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:56,360 INFO L82 PathProgramCache]: Analyzing trace with hash 975572512, now seen corresponding path program 29 times [2020-10-13 04:47:56,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:56,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379703767] [2020-10-13 04:47:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:01,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:01,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:48:01,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:01,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 04:48:01,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:01,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:48:01,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 04:48:01,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:48:01,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:01,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:01,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:01,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:01,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:01,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:01,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:01,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:01,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-13 04:48:01,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379703767] [2020-10-13 04:48:01,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:01,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:48:01,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389871787] [2020-10-13 04:48:01,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:48:01,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:01,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:48:01,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:01,606 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 19 states. [2020-10-13 04:48:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:01,828 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2020-10-13 04:48:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:48:01,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 107 [2020-10-13 04:48:01,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:01,830 INFO L225 Difference]: With dead ends: 161 [2020-10-13 04:48:01,830 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 04:48:01,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:01,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 04:48:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-10-13 04:48:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:48:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2020-10-13 04:48:01,836 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 107 [2020-10-13 04:48:01,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:01,837 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2020-10-13 04:48:01,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:48:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2020-10-13 04:48:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:48:01,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:01,838 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:01,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:48:01,838 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:01,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:01,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1352257252, now seen corresponding path program 30 times [2020-10-13 04:48:01,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:01,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480338428] [2020-10-13 04:48:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:01,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:01,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:06,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:06,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:48:06,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:06,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 04:48:06,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:06,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:48:06,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:06,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:48:06,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:07,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:07,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:07,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:07,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:07,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:07,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:07,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:07,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:07,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:07,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-13 04:48:07,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480338428] [2020-10-13 04:48:07,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:07,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:48:07,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364891255] [2020-10-13 04:48:07,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:48:07,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:48:07,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:07,099 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand 19 states. [2020-10-13 04:48:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:07,227 INFO L93 Difference]: Finished difference Result 198 states and 204 transitions. [2020-10-13 04:48:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:48:07,227 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2020-10-13 04:48:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:07,228 INFO L225 Difference]: With dead ends: 198 [2020-10-13 04:48:07,228 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 04:48:07,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 04:48:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-13 04:48:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:48:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-13 04:48:07,235 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 111 [2020-10-13 04:48:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:07,235 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-13 04:48:07,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:48:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-13 04:48:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 04:48:07,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:07,237 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:07,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:48:07,237 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:07,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:07,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1575275590, now seen corresponding path program 31 times [2020-10-13 04:48:07,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:07,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9158330] [2020-10-13 04:48:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:07,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:12,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:12,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 04:48:12,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:12,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5130 [2020-10-13 04:48:12,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:48:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:48:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:48:12,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:12,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:12,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:12,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:12,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:12,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:12,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:12,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:12,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-13 04:48:12,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9158330] [2020-10-13 04:48:12,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:12,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:48:12,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863331911] [2020-10-13 04:48:12,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:48:12,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:12,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:48:12,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:48:12,608 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 20 states. [2020-10-13 04:48:12,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:12,845 INFO L93 Difference]: Finished difference Result 169 states and 175 transitions. [2020-10-13 04:48:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:48:12,845 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2020-10-13 04:48:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:12,847 INFO L225 Difference]: With dead ends: 169 [2020-10-13 04:48:12,847 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:48:12,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:48:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:48:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-13 04:48:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 04:48:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2020-10-13 04:48:12,859 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 113 [2020-10-13 04:48:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:12,860 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2020-10-13 04:48:12,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:48:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2020-10-13 04:48:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 04:48:12,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:12,863 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:12,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:48:12,863 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash 914352566, now seen corresponding path program 32 times [2020-10-13 04:48:12,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:12,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887390654] [2020-10-13 04:48:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:12,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:12,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:17,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:17,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 04:48:17,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:17,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:48:17,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:17,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:48:17,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:17,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:48:17,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:18,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:18,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:18,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:18,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:18,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:18,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:18,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:18,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:18,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:18,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:18,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-13 04:48:18,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887390654] [2020-10-13 04:48:18,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:18,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:48:18,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671137640] [2020-10-13 04:48:18,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:48:18,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:18,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:48:18,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:48:18,109 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 20 states. [2020-10-13 04:48:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:18,234 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2020-10-13 04:48:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:48:18,234 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 117 [2020-10-13 04:48:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:18,236 INFO L225 Difference]: With dead ends: 208 [2020-10-13 04:48:18,236 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:48:18,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:48:18,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:48:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 04:48:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:48:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-10-13 04:48:18,241 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 117 [2020-10-13 04:48:18,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:18,241 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-10-13 04:48:18,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:48:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-10-13 04:48:18,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:48:18,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:18,243 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:18,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:48:18,243 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:18,244 INFO L82 PathProgramCache]: Analyzing trace with hash 261588, now seen corresponding path program 33 times [2020-10-13 04:48:18,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:18,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242689927] [2020-10-13 04:48:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:18,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:18,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:23,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:23,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:48:23,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:23,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5190 [2020-10-13 04:48:23,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:48:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:48:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:48:23,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:23,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:23,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:23,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:23,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:23,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:23,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:23,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:23,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:23,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:23,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:23,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-13 04:48:23,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242689927] [2020-10-13 04:48:23,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:23,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:48:23,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767220739] [2020-10-13 04:48:23,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:48:23,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:23,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:48:23,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:48:23,689 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 21 states. [2020-10-13 04:48:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:23,863 INFO L93 Difference]: Finished difference Result 177 states and 183 transitions. [2020-10-13 04:48:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:48:23,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 119 [2020-10-13 04:48:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:23,865 INFO L225 Difference]: With dead ends: 177 [2020-10-13 04:48:23,865 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 04:48:23,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:48:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 04:48:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-10-13 04:48:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:48:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2020-10-13 04:48:23,871 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 119 [2020-10-13 04:48:23,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:23,871 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2020-10-13 04:48:23,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:48:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2020-10-13 04:48:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 04:48:23,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:23,872 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:23,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:48:23,872 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1297414448, now seen corresponding path program 34 times [2020-10-13 04:48:23,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:23,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752092448] [2020-10-13 04:48:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:23,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:23,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:28,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:28,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 04:48:28,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:28,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:48:28,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:28,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:48:28,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:28,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:48:28,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:29,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:29,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:29,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:29,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:29,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:29,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:29,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:29,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:29,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:29,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:29,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-13 04:48:29,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752092448] [2020-10-13 04:48:29,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:29,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:48:29,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835157952] [2020-10-13 04:48:29,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:48:29,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:48:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:48:29,125 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand 21 states. [2020-10-13 04:48:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:29,292 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2020-10-13 04:48:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:48:29,293 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 123 [2020-10-13 04:48:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:29,294 INFO L225 Difference]: With dead ends: 218 [2020-10-13 04:48:29,294 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 04:48:29,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:48:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 04:48:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-13 04:48:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 04:48:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2020-10-13 04:48:29,303 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 123 [2020-10-13 04:48:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:29,304 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2020-10-13 04:48:29,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:48:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2020-10-13 04:48:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 04:48:29,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:29,305 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:29,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:48:29,305 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2026572910, now seen corresponding path program 35 times [2020-10-13 04:48:29,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:29,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148944101] [2020-10-13 04:48:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:29,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:29,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:34,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:34,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 04:48:34,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:34,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:48:34,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:48:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:48:34,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:34,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:34,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:34,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:34,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:34,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:34,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:34,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:34,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-13 04:48:34,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148944101] [2020-10-13 04:48:34,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:34,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:48:34,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713363778] [2020-10-13 04:48:34,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:48:34,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:48:34,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:48:34,628 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand 22 states. [2020-10-13 04:48:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:34,797 INFO L93 Difference]: Finished difference Result 220 states and 226 transitions. [2020-10-13 04:48:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:48:34,798 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 125 [2020-10-13 04:48:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:34,799 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:48:34,799 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:48:34,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:48:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:48:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-13 04:48:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 04:48:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2020-10-13 04:48:34,806 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 125 [2020-10-13 04:48:34,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:34,806 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2020-10-13 04:48:34,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:48:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2020-10-13 04:48:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 04:48:34,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:34,807 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:34,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:48:34,808 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:34,808 INFO L82 PathProgramCache]: Analyzing trace with hash 922755724, now seen corresponding path program 36 times [2020-10-13 04:48:34,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:34,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059999857] [2020-10-13 04:48:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:34,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:34,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:40,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:40,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 04:48:40,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:40,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5246 [2020-10-13 04:48:40,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:40,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:48:40,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:48:40,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:48:40,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:40,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:40,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:40,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:40,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:40,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:40,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:40,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2020-10-13 04:48:40,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059999857] [2020-10-13 04:48:40,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:40,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:48:40,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635915179] [2020-10-13 04:48:40,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:48:40,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:40,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:48:40,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:48:40,334 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 22 states. [2020-10-13 04:48:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:40,594 INFO L93 Difference]: Finished difference Result 187 states and 193 transitions. [2020-10-13 04:48:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:48:40,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 127 [2020-10-13 04:48:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:40,596 INFO L225 Difference]: With dead ends: 187 [2020-10-13 04:48:40,596 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 04:48:40,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:48:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 04:48:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-10-13 04:48:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:48:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2020-10-13 04:48:40,603 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 127 [2020-10-13 04:48:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:40,603 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2020-10-13 04:48:40,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:48:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2020-10-13 04:48:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:48:40,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:40,604 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:40,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:48:40,605 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash -723320952, now seen corresponding path program 37 times [2020-10-13 04:48:40,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:40,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673248618] [2020-10-13 04:48:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:40,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:40,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:45,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:45,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:48:45,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:45,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 04:48:45,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:45,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:48:45,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:45,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:48:45,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:45,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:45,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:45,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:45,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:45,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:45,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:45,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:45,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:45,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-10-13 04:48:45,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673248618] [2020-10-13 04:48:45,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:45,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:48:45,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745405189] [2020-10-13 04:48:45,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:48:45,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:45,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:48:45,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:48:45,937 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 23 states. [2020-10-13 04:48:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:46,093 INFO L93 Difference]: Finished difference Result 230 states and 236 transitions. [2020-10-13 04:48:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:48:46,093 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 131 [2020-10-13 04:48:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:46,095 INFO L225 Difference]: With dead ends: 230 [2020-10-13 04:48:46,095 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 04:48:46,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:48:46,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 04:48:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-13 04:48:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 04:48:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2020-10-13 04:48:46,105 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 131 [2020-10-13 04:48:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:46,105 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2020-10-13 04:48:46,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:48:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2020-10-13 04:48:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 04:48:46,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:46,107 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:46,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:48:46,107 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:46,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1399490342, now seen corresponding path program 38 times [2020-10-13 04:48:46,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:46,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826779340] [2020-10-13 04:48:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:46,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:46,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:51,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:51,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 04:48:51,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:51,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 04:48:51,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:51,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:48:51,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:48:51,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:48:51,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:51,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:51,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:51,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:51,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:51,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:51,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:51,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:51,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2020-10-13 04:48:51,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826779340] [2020-10-13 04:48:51,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:51,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:48:51,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493499161] [2020-10-13 04:48:51,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:48:51,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:51,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:48:51,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:48:51,566 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand 23 states. [2020-10-13 04:48:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:51,870 INFO L93 Difference]: Finished difference Result 195 states and 201 transitions. [2020-10-13 04:48:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:48:51,871 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 133 [2020-10-13 04:48:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:51,872 INFO L225 Difference]: With dead ends: 195 [2020-10-13 04:48:51,872 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 04:48:51,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:48:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 04:48:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-13 04:48:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:48:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2020-10-13 04:48:51,880 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 133 [2020-10-13 04:48:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:51,881 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2020-10-13 04:48:51,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:48:51,881 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2020-10-13 04:48:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:48:51,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:51,882 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:51,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:48:51,882 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:51,883 INFO L82 PathProgramCache]: Analyzing trace with hash 977696546, now seen corresponding path program 39 times [2020-10-13 04:48:51,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:51,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297514722] [2020-10-13 04:48:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:51,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:51,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:56,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:48:56,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:48:56,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:48:56,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:56,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:48:56,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:48:56,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:48:56,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:57,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:57,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:57,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:57,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:57,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:57,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:57,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:57,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-13 04:48:57,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297514722] [2020-10-13 04:48:57,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:57,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:48:57,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023748206] [2020-10-13 04:48:57,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:48:57,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:48:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:48:57,244 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand 24 states. [2020-10-13 04:48:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:57,454 INFO L93 Difference]: Finished difference Result 201 states and 207 transitions. [2020-10-13 04:48:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:48:57,455 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 137 [2020-10-13 04:48:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:57,456 INFO L225 Difference]: With dead ends: 201 [2020-10-13 04:48:57,456 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:48:57,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:48:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:48:57,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-13 04:48:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 04:48:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2020-10-13 04:48:57,463 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 137 [2020-10-13 04:48:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:57,463 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2020-10-13 04:48:57,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:48:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2020-10-13 04:48:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 04:48:57,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:57,465 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:57,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:48:57,465 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:57,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:57,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1522075362, now seen corresponding path program 40 times [2020-10-13 04:48:57,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:57,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602526363] [2020-10-13 04:48:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:57,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:57,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:02,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 04:49:02,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:49:02,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-13 04:49:02,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:02,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:49:02,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:02,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:49:02,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:02,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:02,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:02,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:02,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:02,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:02,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:02,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:02,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:02,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:02,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-13 04:49:02,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602526363] [2020-10-13 04:49:02,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:02,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:49:02,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075972860] [2020-10-13 04:49:02,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:49:02,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:02,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:49:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:49:02,849 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand 24 states. [2020-10-13 04:49:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:02,969 INFO L93 Difference]: Finished difference Result 248 states and 254 transitions. [2020-10-13 04:49:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:49:02,969 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 141 [2020-10-13 04:49:02,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:02,971 INFO L225 Difference]: With dead ends: 248 [2020-10-13 04:49:02,971 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 04:49:02,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:49:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 04:49:02,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-13 04:49:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 04:49:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2020-10-13 04:49:02,979 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 141 [2020-10-13 04:49:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:02,981 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2020-10-13 04:49:02,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:49:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2020-10-13 04:49:02,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 04:49:02,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:02,982 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:02,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:49:02,982 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:02,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:02,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1719145276, now seen corresponding path program 41 times [2020-10-13 04:49:02,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:02,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440653482] [2020-10-13 04:49:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:03,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:03,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:08,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:08,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 04:49:08,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:49:08,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5150 [2020-10-13 04:49:08,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:08,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:49:08,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:08,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:49:08,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:08,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:08,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:08,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:08,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:08,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:08,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:08,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:08,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:08,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:08,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:08,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-13 04:49:08,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440653482] [2020-10-13 04:49:08,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:08,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:49:08,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953072564] [2020-10-13 04:49:08,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:49:08,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:08,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:49:08,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:49:08,514 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand 25 states. [2020-10-13 04:49:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:08,679 INFO L93 Difference]: Finished difference Result 250 states and 256 transitions. [2020-10-13 04:49:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:49:08,679 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 143 [2020-10-13 04:49:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:08,681 INFO L225 Difference]: With dead ends: 250 [2020-10-13 04:49:08,681 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 04:49:08,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:49:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 04:49:08,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-10-13 04:49:08,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 04:49:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2020-10-13 04:49:08,689 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 143 [2020-10-13 04:49:08,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:08,689 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2020-10-13 04:49:08,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:49:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2020-10-13 04:49:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 04:49:08,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:08,691 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:08,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:49:08,691 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:08,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1614078502, now seen corresponding path program 42 times [2020-10-13 04:49:08,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:08,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382601632] [2020-10-13 04:49:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:08,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:08,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:13,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:13,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 04:49:13,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:49:13,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 04:49:13,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:49:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 04:49:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:49:13,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:14,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:14,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:14,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:14,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:14,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:14,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:14,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-13 04:49:14,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382601632] [2020-10-13 04:49:14,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:14,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:49:14,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051311126] [2020-10-13 04:49:14,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:49:14,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:14,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:49:14,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:49:14,084 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand 25 states. [2020-10-13 04:49:14,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:14,378 INFO L93 Difference]: Finished difference Result 211 states and 217 transitions. [2020-10-13 04:49:14,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:49:14,379 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 145 [2020-10-13 04:49:14,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:14,381 INFO L225 Difference]: With dead ends: 211 [2020-10-13 04:49:14,381 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 04:49:14,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:49:14,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 04:49:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-10-13 04:49:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 04:49:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2020-10-13 04:49:14,388 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 145 [2020-10-13 04:49:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:14,389 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2020-10-13 04:49:14,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:49:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2020-10-13 04:49:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 04:49:14,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:14,390 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:14,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:49:14,391 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:14,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:14,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1753379798, now seen corresponding path program 43 times [2020-10-13 04:49:14,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:14,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813147540] [2020-10-13 04:49:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:14,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:19,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:19,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 04:49:19,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:49:19,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-13 04:49:19,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:19,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:49:19,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:49:19,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:19,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:19,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:19,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:19,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:19,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:19,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:19,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:19,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-13 04:49:19,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813147540] [2020-10-13 04:49:19,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:19,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:49:19,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991913597] [2020-10-13 04:49:19,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:49:19,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:19,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:49:19,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:49:19,941 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand 26 states. [2020-10-13 04:49:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:20,119 INFO L93 Difference]: Finished difference Result 260 states and 266 transitions. [2020-10-13 04:49:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:49:20,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-10-13 04:49:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:20,121 INFO L225 Difference]: With dead ends: 260 [2020-10-13 04:49:20,121 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 04:49:20,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:49:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 04:49:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-13 04:49:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 04:49:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2020-10-13 04:49:20,129 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 149 [2020-10-13 04:49:20,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:20,129 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2020-10-13 04:49:20,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:49:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2020-10-13 04:49:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 04:49:20,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:20,131 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:20,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:49:20,131 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1140944908, now seen corresponding path program 44 times [2020-10-13 04:49:20,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:20,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412304567] [2020-10-13 04:49:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:20,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:20,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:25,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:25,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 04:49:25,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:49:25,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5280 [2020-10-13 04:49:25,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:25,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:49:25,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 04:49:25,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:49:25,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:25,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:25,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:25,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:25,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:25,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:25,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:25,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:25,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1013 trivial. 0 not checked. [2020-10-13 04:49:25,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412304567] [2020-10-13 04:49:25,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:25,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:49:25,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651228308] [2020-10-13 04:49:25,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:49:25,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:49:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:49:25,792 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand 26 states. [2020-10-13 04:49:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:26,102 INFO L93 Difference]: Finished difference Result 219 states and 225 transitions. [2020-10-13 04:49:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:49:26,103 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 151 [2020-10-13 04:49:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:26,105 INFO L225 Difference]: With dead ends: 219 [2020-10-13 04:49:26,105 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 04:49:26,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:49:26,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 04:49:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-10-13 04:49:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:49:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2020-10-13 04:49:26,111 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 151 [2020-10-13 04:49:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:26,112 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2020-10-13 04:49:26,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:49:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2020-10-13 04:49:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 04:49:26,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:26,113 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:26,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:49:26,114 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash -621266704, now seen corresponding path program 45 times [2020-10-13 04:49:26,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:26,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268370449] [2020-10-13 04:49:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:26,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:31,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:31,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 04:49:31,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:49:31,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-13 04:49:31,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:49:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:49:31,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:31,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:31,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:31,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:31,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:31,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:31,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:31,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:31,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:31,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:31,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:31,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-13 04:49:31,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268370449] [2020-10-13 04:49:31,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:31,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:49:31,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217855855] [2020-10-13 04:49:31,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:49:31,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:31,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:49:31,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:49:31,622 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand 27 states. [2020-10-13 04:49:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:31,783 INFO L93 Difference]: Finished difference Result 270 states and 276 transitions. [2020-10-13 04:49:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:49:31,784 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 155 [2020-10-13 04:49:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:31,785 INFO L225 Difference]: With dead ends: 270 [2020-10-13 04:49:31,786 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 04:49:31,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:49:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 04:49:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-13 04:49:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 04:49:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2020-10-13 04:49:31,792 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 155 [2020-10-13 04:49:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:31,793 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2020-10-13 04:49:31,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:49:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2020-10-13 04:49:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 04:49:31,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:31,794 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:31,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:49:31,795 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash 48907918, now seen corresponding path program 46 times [2020-10-13 04:49:31,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:31,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523905915] [2020-10-13 04:49:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:31,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:31,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:37,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:37,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 04:49:37,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:49:37,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5231 [2020-10-13 04:49:37,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:37,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:49:37,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:49:37,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:49:37,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:37,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:37,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:37,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:37,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:37,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:37,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:37,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:37,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:37,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:37,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:37,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2020-10-13 04:49:37,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523905915] [2020-10-13 04:49:37,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:37,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:49:37,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873733002] [2020-10-13 04:49:37,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:49:37,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:37,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:49:37,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:49:37,427 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand 27 states. [2020-10-13 04:49:37,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:37,744 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2020-10-13 04:49:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:49:37,744 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 157 [2020-10-13 04:49:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:37,746 INFO L225 Difference]: With dead ends: 227 [2020-10-13 04:49:37,746 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 04:49:37,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:49:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 04:49:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-10-13 04:49:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 04:49:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2020-10-13 04:49:37,755 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 157 [2020-10-13 04:49:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:37,756 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2020-10-13 04:49:37,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:49:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2020-10-13 04:49:37,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 04:49:37,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:37,758 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:37,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:49:37,758 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:37,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1644952950, now seen corresponding path program 47 times [2020-10-13 04:49:37,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:37,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977465697] [2020-10-13 04:49:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:37,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:37,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking...