/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:07:22,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:07:22,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:07:22,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:07:22,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:07:22,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:07:22,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:07:22,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:07:22,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:07:22,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:07:22,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:07:22,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:07:22,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:07:22,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:07:22,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:07:22,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:07:22,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:07:22,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:07:22,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:07:22,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:07:22,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:07:22,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:07:22,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:07:22,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:07:22,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:07:22,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:07:22,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:07:22,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:07:22,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:07:22,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:07:22,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:07:22,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:07:22,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:07:22,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:07:22,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:07:22,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:07:22,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:07:22,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:07:22,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:07:22,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:07:22,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:07:22,461 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 [2020-10-27 14:07:22,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:07:22,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:07:22,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:07:22,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:07:22,490 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:07:22,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:07:22,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:07:22,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:07:22,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:07:22,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:07:22,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:07:22,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:07:22,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:07:22,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:07:22,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:07:22,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:07:22,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:07:22,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:07:22,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:07:22,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:07:22,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:07:22,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:07:22,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:07:22,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:07:22,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:07:22,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:07:22,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:07:22,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:07:22,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:07:22,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:07:22,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:07:22,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:07:22,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:07:22,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:07:22,933 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:07:22,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum1.c [2020-10-27 14:07:23,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d626e0868/2ae66180514944faa05ca6c8e630ab5f/FLAG828dbe890 [2020-10-27 14:07:23,705 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:07:23,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum1.c [2020-10-27 14:07:23,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d626e0868/2ae66180514944faa05ca6c8e630ab5f/FLAG828dbe890 [2020-10-27 14:07:24,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d626e0868/2ae66180514944faa05ca6c8e630ab5f [2020-10-27 14:07:24,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:07:24,066 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:07:24,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:24,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:07:24,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:07:24,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:24" (1/1) ... [2020-10-27 14:07:24,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1f9ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24, skipping insertion in model container [2020-10-27 14:07:24,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:24" (1/1) ... [2020-10-27 14:07:24,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:07:24,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:07:24,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:24,284 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:07:24,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:24,320 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:07:24,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24 WrapperNode [2020-10-27 14:07:24,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:24,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:07:24,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:07:24,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:07:24,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24" (1/1) ... [2020-10-27 14:07:24,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24" (1/1) ... [2020-10-27 14:07:24,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24" (1/1) ... [2020-10-27 14:07:24,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24" (1/1) ... [2020-10-27 14:07:24,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24" (1/1) ... [2020-10-27 14:07:24,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24" (1/1) ... [2020-10-27 14:07:24,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24" (1/1) ... [2020-10-27 14:07:24,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:07:24,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:07:24,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:07:24,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:07:24,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24" (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 [2020-10-27 14:07:24,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:07:24,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:07:24,448 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:07:24,448 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:07:24,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:07:24,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:07:24,449 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:07:24,449 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:07:24,449 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:07:24,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:07:24,449 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:07:24,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:07:24,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-27 14:07:24,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:07:24,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:07:24,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:07:24,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:07:24,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:07:24,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:07:24,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:07:24,720 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:07:24,721 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:07:24,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:24 BoogieIcfgContainer [2020-10-27 14:07:24,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:07:24,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:07:24,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:07:24,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:07:24,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:07:24" (1/3) ... [2020-10-27 14:07:24,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586a1d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:24, skipping insertion in model container [2020-10-27 14:07:24,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:24" (2/3) ... [2020-10-27 14:07:24,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586a1d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:24, skipping insertion in model container [2020-10-27 14:07:24,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:24" (3/3) ... [2020-10-27 14:07:24,743 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2020-10-27 14:07:24,768 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:07:24,778 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:07:24,812 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:07:24,857 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:07:24,857 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:07:24,858 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:07:24,858 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:07:24,858 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:07:24,858 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:07:24,858 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:07:24,859 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:07:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-27 14:07:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:07:24,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:24,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:24,885 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2013044110, now seen corresponding path program 1 times [2020-10-27 14:07:24,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:24,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015219357] [2020-10-27 14:07:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:25,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:25,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:25,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:25,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:25,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:25,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:07:25,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:07:25,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-27 14:07:25,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:07:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:07:25,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:07:26,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:26,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:26,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:26,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:26,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:26,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:07:26,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:26,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:26,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:26,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:26,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:26,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015219357] [2020-10-27 14:07:26,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:26,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:07:26,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530382605] [2020-10-27 14:07:26,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:07:26,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:26,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:07:26,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:07:26,147 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2020-10-27 14:07:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:26,391 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-27 14:07:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:07:26,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 14:07:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:26,412 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:07:26,413 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 14:07:26,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 14:07:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-27 14:07:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 14:07:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 14:07:26,478 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-27 14:07:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:26,480 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 14:07:26,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:07:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 14:07:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:07:26,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:26,482 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] [2020-10-27 14:07:26,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:07:26,483 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1239711562, now seen corresponding path program 1 times [2020-10-27 14:07:26,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:26,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847443040] [2020-10-27 14:07:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:26,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:26,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:26,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:26,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:26,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:27,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:27,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:07:27,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:07:27,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-27 14:07:27,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:27,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:07:27,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:27,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:27,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:27,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:27,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:27,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 14:07:27,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:27,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:27,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:27,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:27,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:07:27,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847443040] [2020-10-27 14:07:27,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:27,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:07:27,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131255045] [2020-10-27 14:07:27,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:07:27,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:07:27,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:27,566 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-27 14:07:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:27,738 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-27 14:07:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:07:27,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 14:07:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:27,740 INFO L225 Difference]: With dead ends: 37 [2020-10-27 14:07:27,740 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 14:07:27,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:07:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 14:07:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 14:07:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:07:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 14:07:27,751 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-27 14:07:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:27,751 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 14:07:27,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:07:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 14:07:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:07:27,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:27,753 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:27,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:07:27,753 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:27,754 INFO L82 PathProgramCache]: Analyzing trace with hash -741610246, now seen corresponding path program 2 times [2020-10-27 14:07:27,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:27,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141030801] [2020-10-27 14:07:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:27,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:27,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:27,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:28,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:28,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:28,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:07:28,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:07:28,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1197 [2020-10-27 14:07:28,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:07:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:07:28,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:29,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:29,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:29,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:29,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:29,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:29,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:07:29,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:29,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:29,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:29,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:29,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:29,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141030801] [2020-10-27 14:07:29,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:29,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:07:29,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847777753] [2020-10-27 14:07:29,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:07:29,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:29,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:07:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:07:29,449 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 14 states. [2020-10-27 14:07:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:29,774 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-27 14:07:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:07:29,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-27 14:07:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:29,776 INFO L225 Difference]: With dead ends: 41 [2020-10-27 14:07:29,776 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 14:07:29,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:07:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 14:07:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-27 14:07:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:07:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 14:07:29,785 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2020-10-27 14:07:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:29,786 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 14:07:29,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:07:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 14:07:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:07:29,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:29,787 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:29,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:07:29,788 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash 709352060, now seen corresponding path program 3 times [2020-10-27 14:07:29,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:29,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065467862] [2020-10-27 14:07:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:29,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:29,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:30,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:07:30,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:30,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-27 14:07:30,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:30,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:07:30,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:07:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:07:30,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:30,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:30,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:30,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:30,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:30,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:07:30,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:30,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:30,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065467862] [2020-10-27 14:07:30,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:30,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:07:30,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308940192] [2020-10-27 14:07:30,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:07:30,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:30,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:07:30,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:07:30,292 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2020-10-27 14:07:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:30,512 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-27 14:07:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:07:30,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 14:07:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:30,514 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:07:30,514 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 14:07:30,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:07:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 14:07:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2020-10-27 14:07:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:07:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 14:07:30,522 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-27 14:07:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:30,522 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 14:07:30,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:07:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 14:07:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:07:30,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:30,523 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:30,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:07:30,524 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash -403832260, now seen corresponding path program 4 times [2020-10-27 14:07:30,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:30,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431203850] [2020-10-27 14:07:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:30,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:30,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:07:30,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:30,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-27 14:07:30,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:07:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:07:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:07:30,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:30,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:30,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:30,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:30,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:31,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:07:31,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:31,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:31,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:31,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:31,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:31,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431203850] [2020-10-27 14:07:31,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:31,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:07:31,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308058642] [2020-10-27 14:07:31,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:07:31,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:31,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:07:31,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:07:31,009 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-27 14:07:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:31,248 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-27 14:07:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:07:31,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 14:07:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:31,249 INFO L225 Difference]: With dead ends: 37 [2020-10-27 14:07:31,249 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:07:31,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:07:31,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:07:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 14:07:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:07:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 14:07:31,257 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2020-10-27 14:07:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:31,257 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 14:07:31,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:07:31,257 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 14:07:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:07:31,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:31,258 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:31,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:07:31,259 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:31,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:31,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1103517890, now seen corresponding path program 5 times [2020-10-27 14:07:31,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:31,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156851723] [2020-10-27 14:07:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:31,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:33,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:33,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:07:33,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:07:33,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2468 [2020-10-27 14:07:33,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:33,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:07:33,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:33,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:07:33,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:34,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:34,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:34,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:34,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:34,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:34,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:07:34,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:34,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:34,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:34,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:34,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:34,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156851723] [2020-10-27 14:07:34,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:34,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:07:34,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46184867] [2020-10-27 14:07:34,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:07:34,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:34,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:07:34,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:07:34,471 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 20 states. [2020-10-27 14:07:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:35,457 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-27 14:07:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:07:35,458 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-27 14:07:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:35,459 INFO L225 Difference]: With dead ends: 47 [2020-10-27 14:07:35,459 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:07:35,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:07:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:07:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-27 14:07:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:07:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-27 14:07:35,469 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-10-27 14:07:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:35,469 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-27 14:07:35,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:07:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-27 14:07:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:07:35,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:35,471 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:35,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:07:35,471 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:35,472 INFO L82 PathProgramCache]: Analyzing trace with hash 808457152, now seen corresponding path program 6 times [2020-10-27 14:07:35,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:35,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284118518] [2020-10-27 14:07:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:35,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:35,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:07:35,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:35,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-27 14:07:35,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:07:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:07:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:07:35,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:36,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:36,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:36,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:36,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:36,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:36,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:36,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:36,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:36,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284118518] [2020-10-27 14:07:36,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:36,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:07:36,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50948] [2020-10-27 14:07:36,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:07:36,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:36,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:07:36,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:07:36,081 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 12 states. [2020-10-27 14:07:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:36,341 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-27 14:07:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:07:36,341 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 14:07:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:36,343 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:07:36,343 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:07:36,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:07:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:07:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-10-27 14:07:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:07:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 14:07:36,358 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2020-10-27 14:07:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:36,358 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 14:07:36,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:07:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 14:07:36,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:07:36,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:36,360 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:36,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:07:36,360 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:36,361 INFO L82 PathProgramCache]: Analyzing trace with hash 485182336, now seen corresponding path program 7 times [2020-10-27 14:07:36,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:36,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366448673] [2020-10-27 14:07:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:36,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:36,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:36,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:36,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:07:36,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:36,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-27 14:07:36,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:36,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:07:36,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:07:36,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:07:36,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:36,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:36,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:36,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:36,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:36,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:36,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:36,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:36,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:36,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366448673] [2020-10-27 14:07:36,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:36,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:07:36,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580324122] [2020-10-27 14:07:36,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:07:36,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:37,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:07:37,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:07:37,007 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-27 14:07:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:37,313 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-27 14:07:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:07:37,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 14:07:37,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:37,315 INFO L225 Difference]: With dead ends: 41 [2020-10-27 14:07:37,315 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 14:07:37,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:07:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 14:07:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 14:07:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 14:07:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 14:07:37,327 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2020-10-27 14:07:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:37,328 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 14:07:37,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:07:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 14:07:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:07:37,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:37,330 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:37,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:07:37,330 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:37,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1458983038, now seen corresponding path program 8 times [2020-10-27 14:07:37,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:37,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936310590] [2020-10-27 14:07:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:37,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:40,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:40,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:07:40,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:07:40,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2754 [2020-10-27 14:07:40,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:07:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:07:40,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:41,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:41,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:41,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:41,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:41,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:07:41,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:41,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:41,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936310590] [2020-10-27 14:07:41,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:41,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:07:41,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113264988] [2020-10-27 14:07:41,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:07:41,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:41,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:07:41,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:07:41,234 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 24 states. [2020-10-27 14:07:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:42,947 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-27 14:07:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:07:42,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-27 14:07:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:42,949 INFO L225 Difference]: With dead ends: 54 [2020-10-27 14:07:42,950 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:07:42,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:07:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:07:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-10-27 14:07:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 14:07:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-27 14:07:42,965 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2020-10-27 14:07:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:42,968 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-27 14:07:42,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:07:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-27 14:07:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:07:42,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:42,969 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:42,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:07:42,969 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:42,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1491133692, now seen corresponding path program 9 times [2020-10-27 14:07:42,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:42,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117271319] [2020-10-27 14:07:42,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:42,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:43,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:07:43,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:43,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-27 14:07:43,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:43,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:07:43,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:07:43,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:07:43,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:43,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:43,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:43,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:43,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:07:43,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:43,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117271319] [2020-10-27 14:07:43,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:43,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:07:43,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437000143] [2020-10-27 14:07:43,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:07:43,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:43,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:07:43,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:07:43,715 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 14 states. [2020-10-27 14:07:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:44,084 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-10-27 14:07:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:07:44,085 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 14:07:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:44,086 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:07:44,086 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 14:07:44,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:07:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 14:07:44,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2020-10-27 14:07:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:07:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 14:07:44,102 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 35 [2020-10-27 14:07:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:44,102 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 14:07:44,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:07:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 14:07:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:07:44,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:44,104 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:44,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:07:44,104 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:44,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1374380740, now seen corresponding path program 10 times [2020-10-27 14:07:44,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:44,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389007216] [2020-10-27 14:07:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:44,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:44,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:44,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:44,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:07:44,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:44,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-27 14:07:44,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:44,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:07:44,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:07:44,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:07:44,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:44,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:44,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:44,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:44,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:44,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:07:44,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:44,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:44,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:44,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:44,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:44,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389007216] [2020-10-27 14:07:44,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:44,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:07:44,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078898164] [2020-10-27 14:07:44,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:07:44,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:44,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:07:44,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:07:44,820 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-27 14:07:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:45,253 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-27 14:07:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:07:45,254 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 14:07:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:45,255 INFO L225 Difference]: With dead ends: 45 [2020-10-27 14:07:45,255 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 14:07:45,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:07:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 14:07:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 14:07:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:07:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 14:07:45,272 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2020-10-27 14:07:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:45,273 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 14:07:45,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:07:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 14:07:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:07:45,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:45,276 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:45,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:07:45,276 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:45,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1637808698, now seen corresponding path program 11 times [2020-10-27 14:07:45,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:45,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027540137] [2020-10-27 14:07:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:45,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:48,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:07:48,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:07:48,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3296 [2020-10-27 14:07:48,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:48,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:07:48,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:48,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:07:48,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:50,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:50,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:50,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:50,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:50,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:50,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:07:50,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:50,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:50,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:50,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:50,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:50,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027540137] [2020-10-27 14:07:50,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:50,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:07:50,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273689757] [2020-10-27 14:07:50,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:07:50,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:50,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:07:50,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:07:50,181 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 28 states. [2020-10-27 14:07:50,561 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-27 14:07:50,970 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-27 14:07:51,184 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-27 14:07:51,654 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-27 14:07:52,161 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 14:07:53,022 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 14:07:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:53,333 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-27 14:07:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:07:53,334 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2020-10-27 14:07:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:53,335 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:07:53,335 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 14:07:53,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:07:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 14:07:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-27 14:07:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 14:07:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-27 14:07:53,347 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2020-10-27 14:07:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:53,348 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-27 14:07:53,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:07:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-27 14:07:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:07:53,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:53,349 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:53,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:07:53,349 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:53,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1543901112, now seen corresponding path program 12 times [2020-10-27 14:07:53,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:53,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355087122] [2020-10-27 14:07:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:53,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:53,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:07:53,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:53,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-27 14:07:53,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:53,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:07:53,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:07:53,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:07:53,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:54,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:54,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:54,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:54,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:54,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:07:54,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:54,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:54,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:54,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:54,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:54,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355087122] [2020-10-27 14:07:54,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:54,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:07:54,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870838196] [2020-10-27 14:07:54,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:07:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:07:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:07:54,205 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 16 states. [2020-10-27 14:07:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:54,573 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-10-27 14:07:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:07:54,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 14:07:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:54,574 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:07:54,574 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:07:54,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:07:54,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:07:54,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2020-10-27 14:07:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:07:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-27 14:07:54,593 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 39 [2020-10-27 14:07:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:54,593 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-27 14:07:54,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:07:54,595 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-27 14:07:54,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:07:54,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:54,598 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:54,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:07:54,598 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:54,599 INFO L82 PathProgramCache]: Analyzing trace with hash -858568696, now seen corresponding path program 13 times [2020-10-27 14:07:54,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:54,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780558315] [2020-10-27 14:07:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:54,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:55,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:55,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:07:55,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:55,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-27 14:07:55,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:55,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:07:55,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:07:55,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:07:55,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:55,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:55,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:55,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:55,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:55,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:07:55,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:55,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:55,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:55,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:55,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:55,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780558315] [2020-10-27 14:07:55,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:55,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:07:55,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115959974] [2020-10-27 14:07:55,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:07:55,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:55,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:07:55,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:07:55,383 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-27 14:07:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:55,933 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-27 14:07:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:07:55,933 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 14:07:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:55,934 INFO L225 Difference]: With dead ends: 49 [2020-10-27 14:07:55,934 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:07:55,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:07:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:07:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 14:07:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:07:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 14:07:55,953 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2020-10-27 14:07:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:55,955 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 14:07:55,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:07:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 14:07:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:07:55,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:55,956 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:55,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:07:55,956 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:55,957 INFO L82 PathProgramCache]: Analyzing trace with hash -18568694, now seen corresponding path program 14 times [2020-10-27 14:07:55,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:55,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381359253] [2020-10-27 14:07:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:55,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:56,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:56,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:57,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:57,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:57,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:00,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:00,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:08:00,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:08:00,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4581 [2020-10-27 14:08:00,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:00,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:08:00,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:00,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:08:00,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:02,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:02,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:02,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:02,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:02,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:02,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:02,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:02,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:02,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:02,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:02,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381359253] [2020-10-27 14:08:02,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:02,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:08:02,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319145083] [2020-10-27 14:08:02,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:08:02,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:02,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:08:02,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=865, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:08:02,391 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 31 states. [2020-10-27 14:08:04,311 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 108 [2020-10-27 14:08:04,945 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-27 14:08:06,200 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 14:08:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:06,559 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-10-27 14:08:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:08:06,560 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 41 [2020-10-27 14:08:06,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:06,560 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:08:06,561 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 14:08:06,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=190, Invalid=2066, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:08:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 14:08:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-27 14:08:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:08:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-27 14:08:06,587 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2020-10-27 14:08:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:06,587 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-27 14:08:06,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:08:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-27 14:08:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:08:06,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:06,588 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:06,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:08:06,588 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash -232418420, now seen corresponding path program 15 times [2020-10-27 14:08:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:06,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366368156] [2020-10-27 14:08:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:06,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:06,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:07,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:07,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:08:07,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:07,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-27 14:08:07,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:07,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:08:07,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:08:07,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:08:07,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:07,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:07,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:07,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:07,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:07,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:07,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:07,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:07,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:07,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:07,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:07,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:07,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366368156] [2020-10-27 14:08:07,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:07,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:08:07,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452170279] [2020-10-27 14:08:07,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:08:07,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:07,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:08:07,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:08:07,375 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 18 states. [2020-10-27 14:08:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:07,852 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-10-27 14:08:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:08:07,852 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-27 14:08:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:07,853 INFO L225 Difference]: With dead ends: 77 [2020-10-27 14:08:07,853 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:08:07,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:08:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:08:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-10-27 14:08:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:08:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 14:08:07,864 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 43 [2020-10-27 14:08:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:07,864 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 14:08:07,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:08:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 14:08:07,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:08:07,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:07,865 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:07,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:08:07,866 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:07,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1242037068, now seen corresponding path program 16 times [2020-10-27 14:08:07,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:07,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058449576] [2020-10-27 14:08:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:07,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:07,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:08,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:08:08,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:08,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-27 14:08:08,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:08:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:08:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:08:08,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:08,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:08,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:08,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:08,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:08,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:08,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:08,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:08,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:08,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:08,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:08,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058449576] [2020-10-27 14:08:08,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:08,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:08:08,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344668759] [2020-10-27 14:08:08,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:08:08,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:08,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:08:08,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:08:08,618 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2020-10-27 14:08:09,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:09,315 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-27 14:08:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:08:09,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-27 14:08:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:09,316 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:08:09,316 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 14:08:09,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:08:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 14:08:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 14:08:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:08:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-27 14:08:09,327 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-27 14:08:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:09,327 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-27 14:08:09,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:08:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-27 14:08:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:08:09,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:09,328 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:09,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:08:09,329 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:09,329 INFO L82 PathProgramCache]: Analyzing trace with hash 28941390, now seen corresponding path program 17 times [2020-10-27 14:08:09,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:09,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363399641] [2020-10-27 14:08:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:09,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:09,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:09,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:09,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:10,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:12,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:14,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:08:14,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:08:14,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:08:14,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:08:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:08:14,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:16,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:16,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:16,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:16,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:16,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:16,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:16,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:16,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363399641] [2020-10-27 14:08:16,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:16,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:08:16,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095999482] [2020-10-27 14:08:16,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:08:16,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:16,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:08:16,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1053, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:08:16,629 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 34 states. [2020-10-27 14:08:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:18,295 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-10-27 14:08:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:08:18,295 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-10-27 14:08:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:18,297 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:08:18,297 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:08:18,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:08:18,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:08:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2020-10-27 14:08:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 14:08:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-27 14:08:18,316 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2020-10-27 14:08:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:18,316 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-27 14:08:18,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:08:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-27 14:08:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:08:18,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:18,317 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:18,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:08:18,317 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:18,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1819867952, now seen corresponding path program 18 times [2020-10-27 14:08:18,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:18,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687902343] [2020-10-27 14:08:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:18,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:18,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:19,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:08:19,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 848 [2020-10-27 14:08:19,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:19,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:08:19,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:08:19,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:08:19,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:19,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:19,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:19,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:19,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:19,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:19,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:19,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:19,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:19,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:19,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687902343] [2020-10-27 14:08:19,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:19,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:08:19,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211338956] [2020-10-27 14:08:19,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:08:19,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:19,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:08:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:08:19,460 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 20 states. [2020-10-27 14:08:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:19,956 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-10-27 14:08:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:08:19,957 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-27 14:08:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:19,958 INFO L225 Difference]: With dead ends: 83 [2020-10-27 14:08:19,958 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 14:08:19,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:08:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 14:08:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-27 14:08:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:08:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-27 14:08:19,973 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 47 [2020-10-27 14:08:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:19,973 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-27 14:08:19,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:08:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-27 14:08:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:08:19,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:19,974 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:19,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:08:19,974 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2087615632, now seen corresponding path program 19 times [2020-10-27 14:08:19,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:19,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635988694] [2020-10-27 14:08:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:19,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:20,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:20,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:08:20,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:20,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-27 14:08:20,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:20,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:08:20,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:08:20,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:08:20,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:21,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:21,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:21,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:21,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:21,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:21,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:21,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:21,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:21,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:21,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:21,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:21,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635988694] [2020-10-27 14:08:21,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:21,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:08:21,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181925156] [2020-10-27 14:08:21,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:08:21,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:21,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:08:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:08:21,115 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 20 states. [2020-10-27 14:08:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:21,944 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-27 14:08:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:08:21,944 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-27 14:08:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:21,945 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:08:21,945 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:08:21,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:08:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:08:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 14:08:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:08:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-27 14:08:21,957 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2020-10-27 14:08:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:21,957 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-27 14:08:21,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:08:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-27 14:08:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:08:21,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:21,958 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:21,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:08:21,958 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:21,959 INFO L82 PathProgramCache]: Analyzing trace with hash 881122450, now seen corresponding path program 20 times [2020-10-27 14:08:21,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:21,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958027224] [2020-10-27 14:08:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:21,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:22,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:22,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:22,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:23,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:23,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:25,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:26,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:26,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:27,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:27,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:08:27,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:08:27,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-27 14:08:27,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:27,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:08:27,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:27,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 14:08:27,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:27,933 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-27 14:08:29,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:29,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:29,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:29,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:29,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:29,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:29,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:29,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:29,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:29,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:29,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:29,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958027224] [2020-10-27 14:08:29,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:29,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:08:29,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452138812] [2020-10-27 14:08:29,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:08:29,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:08:29,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1399, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:08:29,972 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 39 states. [2020-10-27 14:08:32,629 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2020-10-27 14:08:33,566 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 14:08:35,600 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 14:08:36,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:36,053 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-10-27 14:08:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 14:08:36,054 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 49 [2020-10-27 14:08:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:36,055 INFO L225 Difference]: With dead ends: 77 [2020-10-27 14:08:36,055 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:08:36,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 14:08:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:08:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-27 14:08:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:08:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-27 14:08:36,067 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 49 [2020-10-27 14:08:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:36,068 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-27 14:08:36,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:08:36,068 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-27 14:08:36,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:08:36,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:36,068 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:36,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:08:36,069 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:36,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:36,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1082344468, now seen corresponding path program 21 times [2020-10-27 14:08:36,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:36,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334305569] [2020-10-27 14:08:36,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:36,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:36,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:36,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:36,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:08:36,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:36,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-27 14:08:36,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:08:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:08:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:08:36,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:37,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:37,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:37,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:37,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:37,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:37,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:37,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:37,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:37,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:37,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:37,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334305569] [2020-10-27 14:08:37,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:37,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:08:37,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427468092] [2020-10-27 14:08:37,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:08:37,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:37,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:08:37,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:08:37,112 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 22 states. [2020-10-27 14:08:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:37,890 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-10-27 14:08:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:08:37,893 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-27 14:08:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:37,893 INFO L225 Difference]: With dead ends: 89 [2020-10-27 14:08:37,894 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:08:37,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:08:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:08:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-10-27 14:08:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:08:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-27 14:08:37,910 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 51 [2020-10-27 14:08:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:37,911 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-27 14:08:37,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:08:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-27 14:08:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:08:37,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:37,911 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:37,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:08:37,912 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:37,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1922315308, now seen corresponding path program 22 times [2020-10-27 14:08:37,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:37,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014154558] [2020-10-27 14:08:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:37,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:37,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:38,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:38,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:08:38,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:38,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-27 14:08:38,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:08:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:08:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:08:38,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:39,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:39,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:39,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:39,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:39,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:39,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:39,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:39,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:39,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:39,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:39,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014154558] [2020-10-27 14:08:39,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:39,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:08:39,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574175963] [2020-10-27 14:08:39,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:08:39,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:39,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:08:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:08:39,117 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 22 states. [2020-10-27 14:08:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:40,211 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-27 14:08:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:08:40,212 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-27 14:08:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:40,213 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:08:40,213 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:08:40,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:08:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:08:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 14:08:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:08:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-27 14:08:40,225 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-10-27 14:08:40,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:40,225 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-27 14:08:40,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:08:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-27 14:08:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:08:40,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:40,227 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:40,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:08:40,228 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash -76846378, now seen corresponding path program 23 times [2020-10-27 14:08:40,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:40,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299292179] [2020-10-27 14:08:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:40,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:40,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:40,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:41,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:42,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:44,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:44,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:45,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:45,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:45,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:08:45,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:08:45,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:08:45,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:45,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 14:08:45,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:08:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:46,445 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-27 14:08:46,702 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-27 14:08:49,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:49,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:49,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:49,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:49,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:49,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:08:49,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:49,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:49,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299292179] [2020-10-27 14:08:49,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:49,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 14:08:49,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924941727] [2020-10-27 14:08:49,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 14:08:49,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:49,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 14:08:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1795, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:08:49,715 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 44 states. [2020-10-27 14:08:50,320 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-27 14:08:50,648 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 14:08:50,949 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-27 14:08:51,260 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-27 14:08:51,576 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-27 14:08:51,906 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-27 14:08:52,227 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-27 14:08:52,540 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-27 14:08:53,724 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2020-10-27 14:08:54,874 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 14:08:57,575 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 14:08:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:58,127 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-10-27 14:08:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 14:08:58,129 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2020-10-27 14:08:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:58,130 INFO L225 Difference]: With dead ends: 83 [2020-10-27 14:08:58,130 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 14:08:58,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=274, Invalid=4282, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 14:08:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 14:08:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2020-10-27 14:08:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:08:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-27 14:08:58,145 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2020-10-27 14:08:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:58,145 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-27 14:08:58,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 14:08:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-27 14:08:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:08:58,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:58,146 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:58,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:08:58,146 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:58,147 INFO L82 PathProgramCache]: Analyzing trace with hash -402697896, now seen corresponding path program 24 times [2020-10-27 14:08:58,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:58,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131314951] [2020-10-27 14:08:58,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:58,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:58,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:58,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:08:58,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:58,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-27 14:08:58,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:58,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:08:58,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:08:58,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:08:58,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:59,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:59,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:59,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:59,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:59,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:59,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:08:59,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:59,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:59,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:59,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:59,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:59,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131314951] [2020-10-27 14:08:59,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:59,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:08:59,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461842265] [2020-10-27 14:08:59,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:08:59,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:59,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:08:59,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:08:59,318 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 24 states. [2020-10-27 14:09:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:00,070 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-10-27 14:09:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:09:00,072 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-27 14:09:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:00,072 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:09:00,072 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:09:00,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:09:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:09:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2020-10-27 14:09:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:09:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 14:09:00,087 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 55 [2020-10-27 14:09:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:00,087 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 14:09:00,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:09:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 14:09:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:09:00,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:00,088 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:00,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:09:00,089 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1662719720, now seen corresponding path program 25 times [2020-10-27 14:09:00,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:00,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680049976] [2020-10-27 14:09:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:00,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:00,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:00,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:00,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:09:00,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:09:00,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-27 14:09:00,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:00,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:09:00,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:09:00,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:09:00,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:01,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:01,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:01,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:01,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:01,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:01,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:01,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:01,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:01,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680049976] [2020-10-27 14:09:01,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:01,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:09:01,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621829064] [2020-10-27 14:09:01,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:09:01,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:01,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:09:01,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:09:01,340 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 24 states. [2020-10-27 14:09:02,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:02,655 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-27 14:09:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:09:02,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-27 14:09:02,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:02,658 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:09:02,658 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 14:09:02,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=455, Invalid=1525, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:09:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 14:09:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 14:09:02,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:09:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-27 14:09:02,668 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2020-10-27 14:09:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:02,669 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-27 14:09:02,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:09:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-27 14:09:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:09:02,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:02,669 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:02,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:09:02,670 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:02,670 INFO L82 PathProgramCache]: Analyzing trace with hash 286410522, now seen corresponding path program 26 times [2020-10-27 14:09:02,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:02,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927931846] [2020-10-27 14:09:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:02,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:02,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:02,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:03,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:04,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:05,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:06,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:07,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:09:07,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:09:07,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:09:07,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:07,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 14:09:07,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:07,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 14:09:07,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:11,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:12,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:12,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:12,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:12,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:12,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:12,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:12,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:12,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:12,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:12,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:12,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927931846] [2020-10-27 14:09:12,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:12,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 14:09:12,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476990617] [2020-10-27 14:09:12,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 14:09:12,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:12,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 14:09:12,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2150, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:09:12,028 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 48 states. [2020-10-27 14:09:15,478 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-27 14:09:16,379 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-27 14:09:19,073 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 14:09:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:19,656 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-10-27 14:09:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 14:09:19,657 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 57 [2020-10-27 14:09:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:19,659 INFO L225 Difference]: With dead ends: 89 [2020-10-27 14:09:19,659 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 14:09:19,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=289, Invalid=5113, Unknown=0, NotChecked=0, Total=5402 [2020-10-27 14:09:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 14:09:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2020-10-27 14:09:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 14:09:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-27 14:09:19,673 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2020-10-27 14:09:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:19,673 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-27 14:09:19,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 14:09:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-27 14:09:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:09:19,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:19,674 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:19,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:09:19,674 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:19,674 INFO L82 PathProgramCache]: Analyzing trace with hash 794832028, now seen corresponding path program 27 times [2020-10-27 14:09:19,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:19,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789772598] [2020-10-27 14:09:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:19,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:19,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:20,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:20,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:09:20,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:09:20,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 853 [2020-10-27 14:09:20,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:09:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:09:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:09:20,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:21,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:21,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:21,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:21,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:21,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:21,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:21,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:21,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789772598] [2020-10-27 14:09:21,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:21,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:09:21,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428207348] [2020-10-27 14:09:21,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:09:21,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:21,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:09:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:09:21,114 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 26 states. [2020-10-27 14:09:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:22,018 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-10-27 14:09:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:09:22,020 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 14:09:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:22,021 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:09:22,021 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:09:22,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:09:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:09:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-10-27 14:09:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:09:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-27 14:09:22,035 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 59 [2020-10-27 14:09:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:22,036 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-27 14:09:22,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:09:22,036 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-27 14:09:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:09:22,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:22,036 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:22,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:09:22,036 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:22,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1094636636, now seen corresponding path program 28 times [2020-10-27 14:09:22,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:22,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826413950] [2020-10-27 14:09:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:22,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:22,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:22,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:22,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:09:22,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:09:22,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-27 14:09:22,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:09:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:09:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:09:22,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:23,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:23,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:23,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:23,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:23,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:23,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:23,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:23,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:23,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826413950] [2020-10-27 14:09:23,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:23,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:09:23,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557187999] [2020-10-27 14:09:23,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:09:23,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:09:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:09:23,507 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 26 states. [2020-10-27 14:09:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:25,240 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-27 14:09:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:09:25,242 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 14:09:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:25,243 INFO L225 Difference]: With dead ends: 69 [2020-10-27 14:09:25,243 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:09:25,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=538, Invalid=1814, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:09:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:09:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 14:09:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:09:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-27 14:09:25,258 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 59 [2020-10-27 14:09:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:25,258 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-27 14:09:25,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:09:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-27 14:09:25,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:09:25,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:25,259 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:25,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:09:25,259 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:25,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:25,260 INFO L82 PathProgramCache]: Analyzing trace with hash 111047006, now seen corresponding path program 29 times [2020-10-27 14:09:25,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:25,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116647688] [2020-10-27 14:09:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:25,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:25,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:25,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:26,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:27,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:27,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:28,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:29,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:30,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:30,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:09:30,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:09:30,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:09:30,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:30,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 14:09:30,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:30,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 14:09:30,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:32,032 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-27 14:09:32,264 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 14:09:36,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:36,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:36,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:36,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:36,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:36,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:36,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:36,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:36,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:36,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:36,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:36,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116647688] [2020-10-27 14:09:36,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:36,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 14:09:36,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924954551] [2020-10-27 14:09:36,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 14:09:36,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:36,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 14:09:36,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2538, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 14:09:36,861 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 52 states. [2020-10-27 14:09:37,621 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-27 14:09:38,075 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 14:09:38,529 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 14:09:39,009 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-27 14:09:39,486 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-27 14:09:39,967 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-27 14:09:40,407 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-27 14:09:40,846 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 14:09:41,292 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 14:09:41,741 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 14:09:42,660 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2020-10-27 14:09:43,844 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 14:09:48,556 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 14:09:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:49,411 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-10-27 14:09:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 14:09:49,413 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 61 [2020-10-27 14:09:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:49,414 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:09:49,414 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:09:49,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=291, Invalid=6029, Unknown=0, NotChecked=0, Total=6320 [2020-10-27 14:09:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:09:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2020-10-27 14:09:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:09:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-27 14:09:49,432 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2020-10-27 14:09:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:49,432 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-27 14:09:49,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 14:09:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-27 14:09:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:09:49,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:49,433 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:49,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:09:49,433 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:49,434 INFO L82 PathProgramCache]: Analyzing trace with hash -225782304, now seen corresponding path program 30 times [2020-10-27 14:09:49,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:49,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029466256] [2020-10-27 14:09:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:49,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:49,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:50,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:50,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:09:50,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:09:50,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 973 [2020-10-27 14:09:50,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:09:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:09:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:09:50,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:51,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:51,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:51,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:51,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:51,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:51,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:51,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:51,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029466256] [2020-10-27 14:09:51,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:51,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:09:51,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850247406] [2020-10-27 14:09:51,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:09:51,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:51,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:09:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:09:51,239 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 28 states. [2020-10-27 14:09:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:52,318 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-27 14:09:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:09:52,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-27 14:09:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:52,321 INFO L225 Difference]: With dead ends: 107 [2020-10-27 14:09:52,322 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 14:09:52,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:09:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 14:09:52,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-10-27 14:09:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:09:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-27 14:09:52,335 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 63 [2020-10-27 14:09:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:52,335 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-27 14:09:52,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:09:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-27 14:09:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:09:52,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:52,335 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:52,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:09:52,336 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash 123637152, now seen corresponding path program 31 times [2020-10-27 14:09:52,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:52,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044017354] [2020-10-27 14:09:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:52,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:52,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:53,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:53,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:09:53,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:09:53,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-27 14:09:53,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:53,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:09:53,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:09:53,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:09:53,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:54,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:54,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:54,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:54,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:54,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:54,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:54,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:54,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:54,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:54,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:54,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:54,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044017354] [2020-10-27 14:09:54,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:54,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:09:54,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225060320] [2020-10-27 14:09:54,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:09:54,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:54,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:09:54,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:09:54,101 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 28 states. [2020-10-27 14:09:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:56,331 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-27 14:09:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:09:56,334 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-27 14:09:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:56,336 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:09:56,336 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:09:56,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=628, Invalid=2128, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 14:09:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:09:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 14:09:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:09:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 14:09:56,362 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2020-10-27 14:09:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:56,365 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 14:09:56,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:09:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 14:09:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:09:56,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:56,366 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:56,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:09:56,367 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:56,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:56,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1011553886, now seen corresponding path program 32 times [2020-10-27 14:09:56,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:56,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326589761] [2020-10-27 14:09:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:56,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:56,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:57,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:57,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:58,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:59,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:00,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:01,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:01,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:10:01,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:10:01,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:10:01,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 14:10:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:01,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:10:01,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:03,722 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-27 14:10:03,999 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-27 14:10:09,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:09,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:09,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:09,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:09,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:09,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:09,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:09,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:09,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:09,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:09,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:10:09,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326589761] [2020-10-27 14:10:09,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:09,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 14:10:09,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300422138] [2020-10-27 14:10:09,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 14:10:09,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:09,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 14:10:09,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2958, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 14:10:09,935 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 56 states. [2020-10-27 14:10:10,940 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-27 14:10:11,510 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-27 14:10:12,078 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-27 14:10:12,684 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-27 14:10:13,282 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-27 14:10:13,904 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-27 14:10:14,532 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-27 14:10:15,096 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-27 14:10:15,696 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 14:10:16,336 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-27 14:10:16,930 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-27 14:10:18,082 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2020-10-27 14:10:19,540 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 14:10:23,466 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 14:10:23,975 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 14:10:24,500 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 14:10:25,686 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 14:10:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:26,783 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-10-27 14:10:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 14:10:26,786 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 65 [2020-10-27 14:10:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:26,787 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:10:26,787 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 14:10:26,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=311, Invalid=6999, Unknown=0, NotChecked=0, Total=7310 [2020-10-27 14:10:26,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 14:10:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-27 14:10:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:10:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-27 14:10:26,805 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2020-10-27 14:10:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:26,806 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-27 14:10:26,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 14:10:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-27 14:10:26,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:10:26,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:26,807 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:26,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:10:26,807 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:26,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1008448220, now seen corresponding path program 33 times [2020-10-27 14:10:26,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:26,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128131155] [2020-10-27 14:10:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:26,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:26,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:28,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:28,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:10:28,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:10:28,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1238 [2020-10-27 14:10:28,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:28,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:10:28,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:10:28,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:10:28,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:29,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:29,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:29,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:29,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:29,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:29,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:10:29,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:29,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:29,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:29,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:29,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:10:29,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128131155] [2020-10-27 14:10:29,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:29,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:10:29,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004401561] [2020-10-27 14:10:29,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:10:29,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:29,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:10:29,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:10:29,227 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 30 states. [2020-10-27 14:10:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:30,969 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2020-10-27 14:10:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:10:30,972 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-27 14:10:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:30,974 INFO L225 Difference]: With dead ends: 113 [2020-10-27 14:10:30,974 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 14:10:30,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=438, Invalid=1454, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:10:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 14:10:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-10-27 14:10:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:10:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-27 14:10:30,989 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 67 [2020-10-27 14:10:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:30,989 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-27 14:10:30,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:10:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-27 14:10:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:10:30,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:30,990 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:30,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:10:30,990 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:30,990 INFO L82 PathProgramCache]: Analyzing trace with hash -223800092, now seen corresponding path program 34 times [2020-10-27 14:10:30,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:30,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209846541] [2020-10-27 14:10:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:31,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:31,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:32,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:32,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:10:32,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:10:32,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1196 [2020-10-27 14:10:32,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:32,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:10:32,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:10:32,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:10:32,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:33,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:33,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:33,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:33,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:33,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:33,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:33,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:33,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:33,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:33,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:33,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:10:33,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209846541] [2020-10-27 14:10:33,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:33,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:10:33,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453058143] [2020-10-27 14:10:33,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:10:33,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:33,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:10:33,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:10:33,425 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 30 states. [2020-10-27 14:10:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:36,340 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-27 14:10:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:10:36,343 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-27 14:10:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:36,348 INFO L225 Difference]: With dead ends: 77 [2020-10-27 14:10:36,348 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:10:36,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=725, Invalid=2467, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 14:10:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:10:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 14:10:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:10:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 14:10:36,371 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-27 14:10:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:36,372 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 14:10:36,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:10:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 14:10:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:10:36,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:36,373 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:36,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:10:36,373 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:36,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash 108703718, now seen corresponding path program 35 times [2020-10-27 14:10:36,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:36,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851048362] [2020-10-27 14:10:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:36,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:36,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:37,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:38,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:39,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:40,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:41,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:41,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:10:41,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:10:41,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:10:41,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:41,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 14:10:41,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:41,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:10:41,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:53,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:53,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:53,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:53,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:53,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:53,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:53,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:53,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:53,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:53,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:53,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:10:53,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851048362] [2020-10-27 14:10:53,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:53,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 14:10:53,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992679897] [2020-10-27 14:10:53,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 14:10:53,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:53,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 14:10:53,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3189, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 14:10:53,607 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 58 states. [2020-10-27 14:11:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:04,642 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-27 14:11:04,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 14:11:04,646 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 69 [2020-10-27 14:11:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:04,648 INFO L225 Difference]: With dead ends: 107 [2020-10-27 14:11:04,648 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:11:04,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=131, Invalid=3529, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 14:11:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:11:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2020-10-27 14:11:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:11:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-27 14:11:04,668 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2020-10-27 14:11:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:04,668 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-27 14:11:04,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 14:11:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-27 14:11:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:11:04,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:04,669 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:04,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:11:04,669 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:04,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1817285224, now seen corresponding path program 36 times [2020-10-27 14:11:04,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:04,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509059820] [2020-10-27 14:11:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:04,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:04,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:05,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:05,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:11:05,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:11:05,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1240 [2020-10-27 14:11:05,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:11:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:11:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:11:05,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:07,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:07,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:07,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:07,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:07,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:07,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:11:07,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:07,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:07,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:07,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:07,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:11:07,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509059820] [2020-10-27 14:11:07,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:07,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:11:07,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660576969] [2020-10-27 14:11:07,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:11:07,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:07,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:11:07,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:11:07,553 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 32 states. [2020-10-27 14:11:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:09,711 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2020-10-27 14:11:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:11:09,714 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-27 14:11:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:09,715 INFO L225 Difference]: With dead ends: 119 [2020-10-27 14:11:09,716 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 14:11:09,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=499, Invalid=1663, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:11:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 14:11:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2020-10-27 14:11:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:11:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-27 14:11:09,732 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 71 [2020-10-27 14:11:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:09,732 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-27 14:11:09,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:11:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-27 14:11:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:11:09,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:09,733 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:09,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:11:09,733 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash -50107864, now seen corresponding path program 37 times [2020-10-27 14:11:09,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:09,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954421167] [2020-10-27 14:11:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:09,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:09,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking...